Kendra Payne

Thanks,
I appreciate the help, this is the hardest subject I have ever taken. I just can't seem to grasp it.

Okay,
I will just go by number
#5. b
#6. a
#7. a
#8. b
#9. b
#10. b

Hi, well here goes, I have my final today and am studying past tests. I was sick and didn't get the answers to the last test and I am not sure I was right so I am asking for a little help to make sure I have the right answers to study. Thanks in advance.
There are 2 programs and 3 questions about each.

1. import java.io.FileInputStream; 2. import java.io.FileOutputStream; 3. import java.io.IOException; 4. 5. public class CopyBytes { 6. public static void main(String[] args) throws IOException { 7. FileInputStream in = null; 8. FileOutputStream out = null; 9. try { 10. in = new FileInputStream("xanadu.txt"); 11. out = new FileOutputStream("outagain.txt"); 12. int c; 13. 14. while ((c = in.read()) != -1) { 15. out.write(c); 16. } 17. 18. } finally { 19. if (in != null) { 20. in.close(); 21. } 22. if (out != null) { 23. out.close(); 24. } 25. } 26. } 27. }

5. What does the above program do?
a. Counts the number of lines of data is contained within outagain.txt
b. Counts the number of bytes of data in xanadu.txt
c. Copies the contents of xanadu.txt to outagain.txt
d. none of the above

6. What is a true statement about line 18?
a. The finally clause only excutes if there is an error in the program
b. The finally clause always executes
c. The finally clause causes the program to write the files
d. All the above

7. What kind of file access does the above program use?
a. Sequential file access
b. Random File Access
c. Symetric File Access
d. Asymetrical file access

1. import java.io.FileReader; 2. import java.io.FileWriter; 3. import java.io.BufferedReader; 4. import java.io.PrintWriter; 5. import java.io.IOException; 6. 7. public class CopyLines { 8. public static void main(String[] args) throws IOException { 9. BufferedReader inputStream = null; 10. PrintWriter outputStream = null; 11. 12. try { 13. inputStream = 14. new BufferedReader(new FileReader("xanadu.txt")); 15. outputStream = 16. new PrintWriter(new FileWriter("characteroutput.txt")); 17. 18. String l; 19. while ((l = inputStream.readLine()) != null) { 20. outputStream.println(l); 21. } 22. } finally { 23. if (inputStream != null) { 24. inputStream.close(); 25. } 26. if (outputStream != null) { 27. outputStream.close(); 28. } 29. } 30. } 31. }

8. What type of file access does the above program use?
a. Sequential file access
b. Random File Access
c. Symetric File Access
d. Asymetrical file access

9. The above program copies the input file how?
a. One character at a time
b. One Line at a time
c. One byte at a time
d. It doesn�t copy the file

10. The output file of the program above is
a. a text file
b. a binary file
c. a symetric file
d. an asymetric file


This is it for me! I am done with Java after today (I hope I pass).

Thanks for everything

Thanks,
this is my last Java class. I don't even know why we have to take 2 quarters of it, it is not enough to do anything with. Nobody in the class wants to be a programmer, we are business majors.

Thanks so much for your help. I have to turn in a final working program on Thurs(tomm) and have nowhere near the comprehension needed to develop one. (as the rest of the class doing this). So do I just put that code in my project? Does that save it somewhere? This has me frustrated to tears.

I am so confused as to what to do. Do you know of any examples anywhere that are similar to this?

This is probably very simple for someone with a little more knowledge than me but I am trying to get the program to save the new information that is entered into the input box. For example, if you enter a new charm, supplier, etc--having it actually add the charm to stay. when I close the program, the info entered is erased. Your help is really appreciated. I have been struggling with Java.
/* Programmer: */ import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; public class CHARM extends JFrame implements ActionListener { //construct components JLabel sortPrompt = new JLabel("Sort by:"); JComboBox fieldCombo = new JComboBox(); JTextPane textPane = new JTextPane(); //initialize data in arrays String title[] = {"Puffy Heart", "Octopus", "Goat","Cat"}; String supplier[] = {"Plum Island A", "Plum Island A", "Sunwest B", "Monster Slayer C"}; String charm[] = {"A-155", "A-558", "B-4567", "C-6247"}; String sales[] = {"15", "6", "8", "1"}; String inventory[] = {"2", "5", "11", "19"}; String totalsold[] = {"20", "12", "10", "4"}; //construct instance of Charm public CHARM() { super("Charm Farm Manager"); } //create the menu system public JMenuBar createMenuBar() { //create an instance of the menu JMenuBar mnuBar = new JMenuBar(); setJMenuBar(mnuBar); //construct and populate the File menu JMenu mnuFile = new JMenu("File", true); mnuFile.setMnemonic(KeyEvent.VK_F); mnuFile.setDisplayedMnemonicIndex(0); mnuBar.add(mnuFile); JMenuItem mnuFileExit = new JMenuItem("Exit"); mnuFileExit.setMnemonic(KeyEvent.VK_X); mnuFileExit.setDisplayedMnemonicIndex(1); mnuFile.add(mnuFileExit); mnuFileExit.setActionCommand("Exit"); mnuFileExit.addActionListener(this); //construct and pouplate the Edit menu JMenu mnuEdit = new JMenu("Edit", true); mnuEdit.setMnemonic(KeyEvent.VK_E); mnuEdit.setDisplayedMnemonicIndex(0); mnuBar.add(mnuEdit); JMenuItem mnuEditInsert = new JMenuItem("Insert new Charm"); mnuEditInsert.setMnemonic(KeyEvent.VK_I); mnuEditInsert.setDisplayedMnemonicIndex(0); mnuEdit.add(mnuEditInsert); mnuEditInsert.setActionCommand("Insert"); mnuEditInsert.addActionListener(this); JMenu mnuEditSearch = new JMenu("Search"); mnuEditSearch.setMnemonic(KeyEvent.VK_R); mnuEditSearch.setDisplayedMnemonicIndex(3); mnuEdit.add(mnuEditSearch); JMenuItem mnuEditSearchByTitle = new JMenuItem("by Title"); mnuEditSearchByTitle.setMnemonic(KeyEvent.VK_T); mnuEditSearchByTitle.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByTitle); mnuEditSearchByTitle.setActionCommand("title"); mnuEditSearchByTitle.addActionListener(this); JMenuItem mnuEditSearchBySupplier = new JMenuItem("by Supplier"); mnuEditSearchBySupplier.setMnemonic(KeyEvent.VK_S); mnuEditSearchBySupplier.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchBySupplier); mnuEditSearchBySupplier.setActionCommand("supplier"); mnuEditSearchBySupplier.addActionListener(this); JMenuItem mnuEditSearchByCharm = new JMenuItem("by Charm"); mnuEditSearchByCharm.setMnemonic(KeyEvent.VK_Y); mnuEditSearchByCharm.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByCharm); mnuEditSearchByCharm.setActionCommand("Charm"); mnuEditSearchByCharm.addActionListener(this); JMenuItem mnuEditSearchBySales = new JMenuItem("By Sales"); mnuEditSearchBySales.setMnemonic(KeyEvent.VK_L); mnuEditSearchBySales.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchBySales); mnuEditSearchBySales.setActionCommand("Sales"); mnuEditSearchBySales.addActionListener(this); JMenuItem mnuEditSearchByInventory = new JMenuItem("By Inventory"); mnuEditSearchByInventory.setMnemonic(KeyEvent.VK_V); mnuEditSearchByInventory.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByInventory); mnuEditSearchByInventory.setActionCommand("Inventory"); mnuEditSearchByInventory.addActionListener(this); JMenuItem mnuEditSearchByTotalsold = new JMenuItem("By Totalsold"); mnuEditSearchByTotalsold.setMnemonic(KeyEvent.VK_O); mnuEditSearchByTotalsold.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByTotalsold); mnuEditSearchByTotalsold.setActionCommand("Totalsold"); mnuEditSearchByTotalsold.addActionListener(this); return mnuBar; } //create content pane public Container createContentPane() { //populate the JCombobox fieldCombo.addItem("Title"); fieldCombo.addItem("Supplier"); fieldCombo.addItem("Charm"); fieldCombo.addItem("Sales"); fieldCombo.addItem("Inventory"); fieldCombo.addItem("Totalsold"); fieldCombo.addActionListener(this); fieldCombo.setToolTipText("click the drop down arrow to diplay sort fields."); //construct and populate the north panel JPanel northPanel = new JPanel(); northPanel.setLayout(new FlowLayout()); northPanel.add(sortPrompt); northPanel.add(fieldCombo); //create the JTextPane and cneter panel JPanel centerPanel = new JPanel(); setTabsAndStyles(textPane); textPane = addTextToTextPane(); JScrollPane scrollPane = new JScrollPane(textPane); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); scrollPane.setPreferredSize(new Dimension(850, 600)); centerPanel.add(scrollPane); //create Container and set attributes Container c = getContentPane(); c.setLayout(new BorderLayout(30,30)); c.add(northPanel,BorderLayout.NORTH); c.add(centerPanel,BorderLayout.CENTER); return c; } //method to create tab stops and set font styles protected void setTabsAndStyles(JTextPane textPane) { //create Tab Stops TabStop[] tabs = new TabStop[5]; tabs[0] = new TabStop(100, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); tabs[1] = new TabStop(305, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); tabs[2] = new TabStop(445, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); tabs[3] = new TabStop(530, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); tabs[4] = new TabStop(645, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); TabSet tabset = new TabSet(tabs); //set Tab Style StyleContext tabStyle = StyleContext.getDefaultStyleContext(); AttributeSet aset = tabStyle.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.TabSet, tabset); textPane.setParagraphAttributes(aset, false); //set Font Style Style fontStyle = StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE); Style regular = textPane.addStyle("regular", fontStyle); StyleConstants.setFontFamily(fontStyle, "SanSerif"); Style s = textPane.addStyle("italic", regular); StyleConstants.setItalic(s, true); s = textPane.addStyle("bold", regular); StyleConstants.setBold(s, true); s = textPane.addStyle("large", regular); StyleConstants.setFontSize(s, 16); } //method to add new text to the JTextPane public JTextPane addTextToTextPane() { Document doc = textPane.getDocument(); try { //clear previous text doc.remove(0, doc.getLength()); //insert title doc.insertString(0,"TITLE\tSUPPLIER\tCHARM\tSALES\tINVENTORY\tTOTALSOLD\n", textPane.getStyle("large")); //insert detail for (int j = 0; j<title.length; j++) { doc.insertString(doc.getLength(), title[j] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), supplier[j] + "\t", textPane.getStyle("italic")); doc.insertString(doc.getLength(), charm[j] + "\t", textPane.getStyle("regular")); doc.insertString(doc.getLength(), sales[j] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), inventory[j] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), totalsold[j] + "\n", textPane.getStyle("bold")); } } catch(BadLocationException ble) { System.err.println("Couldn't insert text."); } return textPane; } //event to process user clicks public void actionPerformed(ActionEvent e ) { String arg = e.getActionCommand(); //user clicks tthe sort by combo box if (e.getSource() == fieldCombo) { switch(fieldCombo.getSelectedIndex()) { case 0: sort(title); break; case 1: sort(supplier); break; case 2: sort(charm); break; case 3: sort(sales); break; case 4: sort(inventory); break; case 5: sort(inventory); break; } } //user clicks Exit on the File menu if (arg == "Exit") System.exit(0); //user clicks Insert New CHARM on the Edit menu if (arg == "Insert") { //accept new data String newTitle = JOptionPane.showInputDialog(null,"Please enter the new charm's title"); String newSupplier = JOptionPane.showInputDialog(null,"Please enter the supplier for" + newTitle); String newCharm = JOptionPane.showInputDialog(null,"Please enter the charm# for" + newTitle); String newSales = JOptionPane.showInputDialog(null,"Please enter the new sales for" + newTitle); String newInventory = JOptionPane.showInputDialog(null,"Please enter the inventory adjustment for" + newTitle); String newTotalsold = JOptionPane.showInputDialog(null,"Please enter the adjustment for total sold" + newTitle); //enlarge arrays title = enlargeArray(title); supplier = enlargeArray(supplier); charm = enlargeArray(charm); sales = enlargeArray(sales); inventory = enlargeArray(inventory); totalsold = enlargeArray(totalsold); //add new data to arrays title[title.length-1] = newTitle; supplier[supplier.length-1] = newSupplier; charm[charm.length-1] = newCharm; sales[sales.length-1] = newSales; inventory[inventory.length-1] = newInventory; totalsold[totalsold.length-1] = newTotalsold; //call sort method sort(title); fieldCombo.setSelectedIndex(0); } //user clicks title on the search submenu if (arg == "title") search(arg, title); //user clicks supplier on the search submenu if (arg == "supplier") search(arg, supplier); //user clicks charm on the search submenu if (arg == "charm#") search(arg, charm); //user clicks sales on the search submenu if (arg == "sales") search(arg, sales); //user clicks inventory on search submenu if (arg == "inventory") search(arg, inventory); //user clicks totalsold on search submenu if (arg == "totalsold") search(arg, totalsold); } //method to enlarge an array by 1 public String[] enlargeArray(String[] currentArray) { String[] newArray = new String[currentArray.length + 1]; for (int i = 0; i<currentArray.length; i++) newArray[i] = currentArray[i]; return newArray; } //method to sort arrays public void sort(String tempArray[]) { //loop to control number of passes for (int pass = 1; pass < tempArray.length; pass++) { for (int element = 0; element < tempArray.length - 1; element++) if (tempArray[element].compareTo(tempArray[element + 1])>0) { swap(title, element, element + 1); swap(supplier, element, element + 1); swap(charm, element, element + 1); swap(sales, element, element + 1); swap(inventory, element, element + 1); swap(totalsold, element, element + 1); } } addTextToTextPane(); } //method to swap two elements of an array public void swap(String swapArray[], int first, int second) { String hold; //temporary holding area for swap hold = swapArray[first]; swapArray[first] = swapArray[second]; swapArray[second] = hold; } public void search(String searchField, String searchArray[]) { try { Document doc = textPane.getDocument(); //assign text to document object doc.remove(0,doc.getLength()); //clear previous text //display column titles doc.insertString(0,"TITLE\tSUPPLIER\tCHARM\tSALES\tINVENTORY\tTOTALSOLD\n",textPane.getStyle("large")); //prompt user for search data String search = JOptionPane.showInputDialog(null, "Please enter the "+ searchField); boolean found = false; //search arrays for (int i = 0; i<title.length; i++) { if (search.compareTo(searchArray[i])==0) { doc.insertString(doc.getLength(), title[i] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), supplier[i] +"\t", textPane.getStyle("italic")); doc.insertString(doc.getLength(), charm[i] + "\t", textPane.getStyle("regular")); doc.insertString(doc.getLength(), sales[i] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), inventory[i] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), totalsold[i] + "\n", textPane.getStyle("bold")); found = true; } } if (found == false) { JOptionPane.showMessageDialog(null, "Your search produced no results.", "No results found",JOptionPane.INFORMATION_MESSAGE); sort(title); } } catch(BadLocationException ble) { System.err.println("Couldn't insert text."); } } //main method executes at run time public void createAndShowGUI() { JFrame.setDefaultLookAndFeelDecorated(true); CHARM f = new CHARM(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setJMenuBar(f.createMenuBar()); f.setContentPane(f.createContentPane()); f.setSize(900,475); f.setVisible(true); } }

Edit by mw: Changed subject line to be more accurate.
[ March 06, 2007: Message edited by: marc weber ]

THANK YOU, THANK YOU, THANK YOU!

Hi,
newbie here. I have a program I am working on and-it opens with a splash screen then the following code runs. The problem is when I do a sort by...it comes up please enter comboBoxChanged with a field below it. I am so confused and don't know what the problem is. I realllllly appreciate your help.

/* Programmer: */ import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; public class CHARM extends JFrame implements ActionListener { //construct components JLabel sortPrompt = new JLabel("Sort by:"); JComboBox fieldCombo = new JComboBox(); JTextPane textPane = new JTextPane(); //initialize data in arrays String title[] = {"Puffy Heart", "Octopus", "Goat","Cat"}; String supplier[] = {"Plum Island A", "Plum Island A", "Sunwest B", "Monster Slayer C"}; String charm[] = {"A-155", "A-558", "B-4567", "C-6247"}; //construct instance of Charm public CHARM() { super("Charm Farm Manager"); } //create the menu system public JMenuBar createMenuBar() { //create an instance of the menu JMenuBar mnuBar = new JMenuBar(); setJMenuBar(mnuBar); //construct and populate the File menu JMenu mnuFile = new JMenu("File", true); mnuFile.setMnemonic(KeyEvent.VK_F); mnuFile.setDisplayedMnemonicIndex(0); mnuBar.add(mnuFile); JMenuItem mnuFileExit = new JMenuItem("Exit"); mnuFileExit.setMnemonic(KeyEvent.VK_X); mnuFileExit.setDisplayedMnemonicIndex(1); mnuFile.add(mnuFileExit); mnuFileExit.setActionCommand("Exit"); mnuFileExit.addActionListener(this); //construct and pouplate the Edit menu JMenu mnuEdit = new JMenu("Edit", true); mnuEdit.setMnemonic(KeyEvent.VK_E); mnuEdit.setDisplayedMnemonicIndex(0); mnuBar.add(mnuEdit); JMenuItem mnuEditInsert = new JMenuItem("Insert new Charm"); mnuEditInsert.setMnemonic(KeyEvent.VK_I); mnuEditInsert.setDisplayedMnemonicIndex(0); mnuEdit.add(mnuEditInsert); mnuEditInsert.setActionCommand("Insert"); mnuEditInsert.addActionListener(this); JMenu mnuEditSearch = new JMenu("Search"); mnuEditSearch.setMnemonic(KeyEvent.VK_R); mnuEditSearch.setDisplayedMnemonicIndex(3); mnuEdit.add(mnuEditSearch); JMenuItem mnuEditSearchByTitle = new JMenuItem("by Title"); mnuEditSearchByTitle.setMnemonic(KeyEvent.VK_T); mnuEditSearchByTitle.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByTitle); mnuEditSearchByTitle.setActionCommand("title"); mnuEditSearchByTitle.addActionListener(this); JMenuItem mnuEditSearchBySupplier = new JMenuItem("by Supplier"); mnuEditSearchBySupplier.setMnemonic(KeyEvent.VK_S); mnuEditSearchBySupplier.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchBySupplier); mnuEditSearchBySupplier.setActionCommand("supplier"); mnuEditSearchBySupplier.addActionListener(this); JMenuItem mnuEditSearchByCharm = new JMenuItem("by Charm"); mnuEditSearchByCharm.setMnemonic(KeyEvent.VK_Y); mnuEditSearchByCharm.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByCharm); mnuEditSearchByCharm.setActionCommand("Charm"); mnuEditSearchByCharm.addActionListener(this); return mnuBar; } //create content pane public Container createContentPane() { //populate the JCombobox fieldCombo.addItem("Title"); fieldCombo.addItem("Supplier"); fieldCombo.addItem("Charm"); fieldCombo.addActionListener(this); fieldCombo.setToolTipText("click the drop down arrow to diplay sort fields."); //construct and populate the north panel JPanel northPanel = new JPanel(); northPanel.setLayout(new FlowLayout()); northPanel.add(sortPrompt); northPanel.add(fieldCombo); //create the JTextPane and cneter panel JPanel centerPanel = new JPanel(); setTabsAndStyles(textPane); textPane = addTextToTextPane(); JScrollPane scrollPane = new JScrollPane(textPane); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); scrollPane.setPreferredSize(new Dimension(500, 200)); centerPanel.add(scrollPane); //create Container and set attributes Container c = getContentPane(); c.setLayout(new BorderLayout(10,10)); c.add(northPanel,BorderLayout.NORTH); c.add(centerPanel,BorderLayout.CENTER); return c; } //method to create tab stops and set font styles protected void setTabsAndStyles(JTextPane textPane) { //create Tab Stops TabStop[] tabs = new TabStop[2]; tabs[0] = new TabStop(200, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); tabs[1] = new TabStop(350, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); TabSet tabset = new TabSet(tabs); //set Tab Style StyleContext tabStyle = StyleContext.getDefaultStyleContext(); AttributeSet aset = tabStyle.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.TabSet, tabset); textPane.setParagraphAttributes(aset, false); //set Font Style Style fontStyle = StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE); Style regular = textPane.addStyle("regular", fontStyle); StyleConstants.setFontFamily(fontStyle, "SanSerif"); Style s = textPane.addStyle("italic", regular); StyleConstants.setItalic(s, true); s = textPane.addStyle("bold", regular); StyleConstants.setBold(s, true); s = textPane.addStyle("large", regular); StyleConstants.setFontSize(s, 16); } //method to add new text to the JTextPane public JTextPane addTextToTextPane() { Document doc = textPane.getDocument(); try { //clear previous text doc.remove(0, doc.getLength()); //insert title doc.insertString(0,"TITLE\tSUPPLIER\tCHARM\n", textPane.getStyle("large")); //insert detail for (int j = 0; j<title.length; j++) { doc.insertString(doc.getLength(), title[j] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), supplier[j] + "\t", textPane.getStyle("italic")); doc.insertString(doc.getLength(), charm[j] + "\n", textPane.getStyle("regular")); } } catch(BadLocationException ble) { System.err.println("Couldn't insert text."); } return textPane; } //event to process user clicks public void actionPerformed(ActionEvent e ) { String arg = e.getActionCommand(); //user clicks tthe sort by combo box if (e.getSource() == fieldCombo) { switch(fieldCombo.getSelectedIndex()) { case 0: sort(title); break; case 1: sort(supplier); break; case 2: sort(charm); break; } } //user clicks Exit on the File menu if (arg == "Exit") System.exit(0); //user clicks Insert New CHARM on the Edit menu if (arg == "Insert") { //accept new data String newTitle = JOptionPane.showInputDialog(null,"Please enter the new charm's title"); String newSupplier = JOptionPane.showInputDialog(null,"Please enter the supplier for" + newTitle); String newCharm = JOptionPane.showInputDialog(null,"Please enter the charm# for" + newTitle); //enlarge arrays title = enlargeArray(title); supplier = enlargeArray(supplier); charm = enlargeArray(charm); //add new data to arrays title[title.length-1] = newTitle; supplier[supplier.length-1] = newSupplier; charm[charm.length-1] = newCharm; //call sort method sort(title); fieldCombo.setSelectedIndex(0); } //user clicks title on the search submenu if (arg == "title"); search(arg, title); //user clicks studio on the search submenu if (arg == "supplier"); search(arg, supplier); //user clicks Year on the search submenu if (arg == "charm#"); search(arg, charm); } //method to enlarge an array by 1 public String[] enlargeArray(String[] currentArray) { String[] newArray = new String[currentArray.length + 1]; for (int i = 0; i<currentArray.length; i++) newArray[i] = currentArray[i]; return newArray; } //method to sort arrays public void sort(String tempArray[]) { //loop to control number of passes for (int pass = 1; pass < tempArray.length; pass++) { for (int element = 0; element < tempArray.length - 1; element++) if (tempArray[element].compareTo(tempArray[element + 1])>0) { swap(title, element, element + 1); swap(supplier, element, element + 1); swap(charm, element, element + 1); } } addTextToTextPane(); } //method to swap two elements of an array public void swap(String swapArray[], int first, int second) { String hold; //temporary holding area for swap hold = swapArray[first]; swapArray[first] = swapArray[second]; swapArray[second] = hold; } public void search(String searchField, String searchArray[]) { try { Document doc = textPane.getDocument(); //assign text to document object doc.remove(0,doc.getLength()); //clear previous text //display column titles doc.insertString(0,"TITLE\tSUPPLIER\tCHARM\n",textPane.getStyle("large")); //prompt user for search data String search = JOptionPane.showInputDialog(null, "Please enter the "+ searchField); boolean found = false; //search arrays for (int i = 0; i<title.length; i++) { if (search.compareTo(searchArray[i])==0) { doc.insertString(doc.getLength(), title[i] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), supplier[i] +"\t", textPane.getStyle("italic")); doc.insertString(doc.getLength(), charm[i] + "\n", textPane.getStyle("regular")); found = true; } } if (found == false) { JOptionPane.showMessageDialog(null, "Your search produced no results.", "No results found",JOptionPane.INFORMATION_MESSAGE); sort(title); } } catch(BadLocationException ble) { System.err.println("Couldn't insert text."); } } //main method executes at run time public void createAndShowGUI() { JFrame.setDefaultLookAndFeelDecorated(true); CHARM f = new CHARM(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setJMenuBar(f.createMenuBar()); f.setContentPane(f.createContentPane()); f.setSize(600,375); f.setVisible(true); } }

I am sorry but I just don't understand how to put the two together.

Thanks so much, would I just put the name of the program in place of the MainFrame?

Hi, I am trying to put these two programs together to show a splash screen at the beginning of my program. I don't have a clue as to how to do this. Here are the two programs. I am new to Java and really having a hard time. I have read and read and still don't get it. Your help is really appreciated.



import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; public class DVD extends JFrame implements ActionListener { //construct components JLabel sortPrompt = new JLabel("Sort by:"); JComboBox fieldCombo = new JComboBox(); JTextPane textPane = new JTextPane(); //initialize data in arrays String title[] = {"Casablanca", "Citizen Kane", "singin in the Rain","The Wizard of Oz"}; String studio[] = {"Warner Brothers", "RKO PIctures", "MGM", "MGM"}; String year[] = {"1942", "1941", "1952", "1939"}; //construct instance of Charm public DVD() { super("Charm Farm Manager"); } //create the menu system public JMenuBar createMenuBar() { //create an instance of the menu JMenuBar mnuBar = new JMenuBar(); setJMenuBar(mnuBar); //construct and populate the File menu JMenu mnuFile = new JMenu("File", true); mnuFile.setMnemonic(KeyEvent.VK_F); mnuFile.setDisplayedMnemonicIndex(0); mnuBar.add(mnuFile); JMenuItem mnuFileExit = new JMenuItem("Exit"); mnuFileExit.setMnemonic(KeyEvent.VK_X); mnuFileExit.setDisplayedMnemonicIndex(1); mnuFile.add(mnuFileExit); mnuFileExit.setActionCommand("Exit"); mnuFileExit.addActionListener(this); //construct and pouplate the Edit menu JMenu mnuEdit = new JMenu("Edit", true); mnuEdit.setMnemonic(KeyEvent.VK_E); mnuEdit.setDisplayedMnemonicIndex(0); mnuBar.add(mnuEdit); JMenuItem mnuEditInsert = new JMenuItem("Insert new Charm"); mnuEditInsert.setMnemonic(KeyEvent.VK_I); mnuEditInsert.setDisplayedMnemonicIndex(0); mnuEdit.add(mnuEditInsert); mnuEditInsert.setActionCommand("Insert"); mnuEditInsert.addActionListener(this); JMenu mnuEditSearch = new JMenu("Search"); mnuEditSearch.setMnemonic(KeyEvent.VK_R); mnuEditSearch.setDisplayedMnemonicIndex(3); mnuEdit.add(mnuEditSearch); JMenuItem mnuEditSearchByTitle = new JMenuItem("by Title"); mnuEditSearchByTitle.setMnemonic(KeyEvent.VK_T); mnuEditSearchByTitle.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByTitle); mnuEditSearchByTitle.setActionCommand("title"); mnuEditSearchByTitle.addActionListener(this); JMenuItem mnuEditSearchByStudio = new JMenuItem("by Studio"); mnuEditSearchByStudio.setMnemonic(KeyEvent.VK_S); mnuEditSearchByStudio.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByStudio); mnuEditSearchByStudio.setActionCommand("studio"); mnuEditSearchByStudio.addActionListener(this); JMenuItem mnuEditSearchByYear = new JMenuItem("by year"); mnuEditSearchByYear.setMnemonic(KeyEvent.VK_Y); mnuEditSearchByYear.setDisplayedMnemonicIndex(3); mnuEditSearch.add(mnuEditSearchByYear); mnuEditSearchByYear.setActionCommand("year"); mnuEditSearchByYear.addActionListener(this); return mnuBar; } //create content pane public Container createContentPane() { //populate the JCombobox fieldCombo.addItem("Title"); fieldCombo.addItem("Studio"); fieldCombo.addItem("Year"); fieldCombo.addActionListener(this); fieldCombo.setToolTipText("click the drop down arrow to diplay sort fields."); //construct and populate the north panel JPanel northPanel = new JPanel(); northPanel.setLayout(new FlowLayout()); northPanel.add(sortPrompt); northPanel.add(fieldCombo); //create the JTextPane and cneter panel JPanel centerPanel = new JPanel(); setTabsAndStyles(textPane); textPane = addTextToTextPane(); JScrollPane scrollPane = new JScrollPane(textPane); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); scrollPane.setPreferredSize(new Dimension(500, 200)); centerPanel.add(scrollPane); //create Container and set attributes Container c = getContentPane(); c.setLayout(new BorderLayout(10,10)); c.add(northPanel,BorderLayout.NORTH); c.add(centerPanel,BorderLayout.CENTER); return c; } //method to create tab stops and set font styles protected void setTabsAndStyles(JTextPane textPane) { //create Tab Stops TabStop[] tabs = new TabStop[2]; tabs[0] = new TabStop(200, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); tabs[1] = new TabStop(350, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE); TabSet tabset = new TabSet(tabs); //set Tab Style StyleContext tabStyle = StyleContext.getDefaultStyleContext(); AttributeSet aset = tabStyle.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.TabSet, tabset); textPane.setParagraphAttributes(aset, false); //set Font Style Style fontStyle = StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE); Style regular = textPane.addStyle("regular", fontStyle); StyleConstants.setFontFamily(fontStyle, "SanSerif"); Style s = textPane.addStyle("italic", regular); StyleConstants.setItalic(s, true); s = textPane.addStyle("bold", regular); StyleConstants.setBold(s, true); s = textPane.addStyle("large", regular); StyleConstants.setFontSize(s, 16); } //method to add new text to the JTextPane public JTextPane addTextToTextPane() { Document doc = textPane.getDocument(); try { //clear previous text doc.remove(0, doc.getLength()); //insert title doc.insertString(0,"TITLE\tSTUDIO\tYEAR\n", textPane.getStyle("large")); //insert detail for (int j = 0; j<title.length; j++) { doc.insertString(doc.getLength(), title[j] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), studio[j] + "\t", textPane.getStyle("italic")); doc.insertString(doc.getLength(), year[j] + "\n", textPane.getStyle("regular")); } } catch(BadLocationException ble) { System.err.println("Couldn't insert text."); } return textPane; } //event to process user clicks public void actionPerformed(ActionEvent e ) { String arg = e.getActionCommand(); //user clicks tthe sort by combo box if (e.getSource() == fieldCombo) { switch(fieldCombo.getSelectedIndex()) { case 0: sort(title); break; case 1: sort(studio); break; case 2: sort(year); break; } } //user clicks Exit on the File menu if (arg == "Exit") System.exit(0); //user clicks Insert New DVD on the Edit menu if (arg == "Insert") { //accept new data String newTitle = JOptionPane.showInputDialog(null,"Please enter the new movie's title"); String newStudio = JOptionPane.showInputDialog(null,"Please enter the studio for" + newTitle); String newYear = JOptionPane.showInputDialog(null,"Please enter the year for" + newTitle); //enlarge arrays title = enlargeArray(title); studio = enlargeArray(studio); year = enlargeArray(year); //add new data to arrays title[title.length-1] = newTitle; studio[studio.length-1] = newStudio; year[year.length-1] = newYear; //call sort method sort(title); fieldCombo.setSelectedIndex(0); } //user clicks title on the search submenu if (arg == "title"); search(arg, title); //user clicks studio on the search submenu if (arg == "studio"); search(arg, studio); //user clicks Year on the search submenu if (arg == "year"); search(arg, year); } //method to enlarge an array by 1 public String[] enlargeArray(String[] currentArray) { String[] newArray = new String[currentArray.length + 1]; for (int i = 0; i<currentArray.length; i++) newArray[i] = currentArray[i]; return newArray; } //method to sort arrays public void sort(String tempArray[]) { //loop to control number of passes for (int pass = 1; pass < tempArray.length; pass++) { for (int element = 0; element < tempArray.length - 1; element++) if (tempArray[element].compareTo(tempArray[element + 1])>0) { swap(title, element, element + 1); swap(studio, element, element + 1); swap(year, element, element + 1); } } addTextToTextPane(); } //method to swap two elements of an array public void swap(String swapArray[], int first, int second) { String hold; //temporary holding area for swap hold = swapArray[first]; swapArray[first] = swapArray[second]; swapArray[second] = hold; } public void search(String searchField, String searchArray[]) { try { Document doc = textPane.getDocument(); //assign text to document object doc.remove(0,doc.getLength()); //clear previous text //display column titles doc.insertString(0,"TITLE\tSTUDIO\tYEAR\n",textPane.getStyle("large")); //prompt user for search data String search = JOptionPane.showInputDialog(null, "Please enter the "+ searchField); boolean found = false; //search arrays for (int i = 0; i<title.length; i++) { if (search.compareTo(searchArray[i])==0) { doc.insertString(doc.getLength(), title[i] + "\t", textPane.getStyle("bold")); doc.insertString(doc.getLength(), studio[i] +"\t", textPane.getStyle("italic")); doc.insertString(doc.getLength(), year[i] + "\n", textPane.getStyle("regular")); found = true; } } if (found == false) { JOptionPane.showMessageDialog(null, "Your search produced no results.", "No results found",JOptionPane.INFORMATION_MESSAGE); sort(title); } } catch(BadLocationException ble) { System.err.println("Couldn't insert text."); } } //main method executes at run time public static void main(String args[]) { JFrame.setDefaultLookAndFeelDecorated(true); DVD f = new DVD(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setJMenuBar(f.createMenuBar()); f.setContentPane(f.createContentPane()); f.setSize(600,375); f.setVisible(true); } } import java.awt.*; import javax.swing.*; public class SplashScreen extends JWindow { //private static FoodDailog dailog; private int duration; public SplashScreen(int d) { duration = d; } // A simple little method to show a title screen in the center // of the screen for the amount of time given in the constructor public void showSplash() { JPanel content = (JPanel)getContentPane(); content.setBackground(Color.blue); // Set the window's bounds, centering the window int width = 900; int height =400; Dimension screen = Toolkit.getDefaultToolkit().getScreenSize(); int x = (screen.width-width)/2; int y = (screen.height-height)/2; setBounds(x,y,width,height); // Build the splash screen JLabel label = new JLabel(new ImageIcon("computer.gif")); JLabel copyrt = new JLabel ("CHARM FARM MANAGER", JLabel.CENTER); copyrt.setFont(new Font("Sans-Serif", Font.BOLD, 36)); content.add(label, BorderLayout.CENTER); content.add(copyrt, BorderLayout.SOUTH); Color oraRed = new Color(156, 20, 20, 255); content.setBorder(BorderFactory.createLineBorder(oraRed, 50)); // Display it setVisible(true); // Wait a little while, maybe while loading resources try { Thread.sleep(duration); } catch (Exception e) {} setVisible(false); } public void showSplashAndExit() { showSplash(); System.exit(0); } public static void main(String[] args) { // Throw a nice little title page up on the screen first SplashScreen splash = new SplashScreen(10000); // Normally, we'd call splash.showSplash() and get on with the program. // But, since this is only a test... splash.showSplashAndExit(); //splash } }

Thanks!
Do you know you to change the names of the columns? I can get the table to create but when I change the names from say MyColumn1 to a title I would like to have, I get a syntax error when I run the application.

Hi,
I am new to Java and don't know much. I am trying to build a simple program to access my MS Access database. I am not sure how to put all of the components together. My ins gave us parts but I don't know what to do with them.

Any help is appreciated-thanks so much
//******THIS IS THE FIRST PART OF THE CODE import java.sql.*; public class CreateTable { public static void main(String[] args) { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // Connect to the database mdbTEST String dataSourceName = "CharmFarm"; String dbURL = "jdbc :-o dbc:" + dataSourceName; Connection con = DriverManager.getConnection(dbURL, "",""); // try and create a java.sql.Statement so we can run queries Statement s = con.createStatement(); // create a table and first column s.execute("create table CharmFarm ( myColumn1 integer, myColumn2 string )"); s.close(); // close the Statement to let the database know we're done with it con.close(); // close the Connection to let the database know we're done with it } // end of try catch (Exception err) { System.out.println("ERROR: " + err); } // end of catch } //end of main method } // end of Class //*************THIS IS THE 2ND PART OF THE CODE import java.sql.*; public class InsertRecord { public static void main(String[] args) { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // Connect to the database mdbTEST String dataSourceName = "CharmFarm"; String dbURL = "jdbc :-o dbc:" + dataSourceName; Connection con = DriverManager.getConnection(dbURL, "CharmFarm",""); // try and create a java.sql.Statement so we can run queries Statement s = con.createStatement(); // insert some data into the table s.execute("insert into CharmFarm values(1, 'Sunwest Silver')"); s.execute("insert into CharmFarm values(2, 'Roger')"); s.close(); // close the Statement to let the database know we're done with it con.close(); // close the Connection to let the database know we're done with it } // End of try catch (Exception err) { System.out.println("ERROR: " + err); } // end of catch }// end of main method } // end of class //***********************THIS IS THE THIRD import java.sql.*; public class ViewDB { public static void main(String[] args) { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // Connect to the database mdbTEST String dataSourceName = "CharmFarm"; String dbURL = "jdbc :-o dbc:" + dataSourceName; Connection con = DriverManager.getConnection(dbURL, "",""); // try and create a java.sql.Statement so we can run queries Statement s = con.createStatement(); // select the data from the table s.execute("select * FROM CharmFarm"); // get any ResultSet that came from our query ResultSet rs = s.getResultSet(); // if rs == null, then there is no ResultSet to view if (rs != null) // this will step through our data row-by-row while ( rs.next() ) { /* the next line will get the first column in our current row's ResultSet as a String ( getString( columnNumber) ) and output it to the screen */ System.out.println("Data from myColumn1: " + rs.getString(1) + ", " + rs.getString(2)); } // end of while s.close(); // close the Statement to let the database know we're done with it con.close(); // close the Connection to let the database know we're done with it } // End of try catch (Exception err) { System.out.println("ERROR: " + err); } // end of catch }// end of main method } // end of class

[ February 04, 2007: Message edited by: Kendra Payne ]
[ February 04, 2007: Message edited by: Kendra Payne ]

I fixed and got it to compile but it is a blank white frame. The buttons are not there.