oh. i am using db4o as my database. so it's a object database. i don't think there is any command for me to sort. but my team mate already sorted that out. i am not sure how yet but i will ask her and see. thanks alot for your help

18 years ago

Java in General

sorting of data during String Tokenizer method

i already can read from text file using string tokenizer and store it into the database. now the problem is, after it read line by line... but when it stores it.. it doesn't store the data in orderly format. it jumble up everything without following the sequence like in the text file?
can anyone help me on this? thanks

18 years ago

Java in General

IntervalCategoryDataset error in JSP page

org.apache.jasper.JasperException: org/jfree/data/category/IntervalCategoryDataset
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

18 years ago

Java in General

Submit button calling Java Methods

Can anyone please guide me if i have two jsp pages and after i press the submit button in the first page, i want to run two methods in java, that is stored and retrieve method whereby i want to display the results after i have retrieved in the second jsp page?

thanks alot

18 years ago

JSP

Passing objects to different methods

yeah. correct. what you said is my problem

18 years ago

Java in General

Passing objects to different methods

really sorry about that.

ok, let's get to the point

createDataset() method wants to generate a graph. but it needs values.
StartDate() and EndDate() is the methods to extract out the necessary values to be used in the createDataset(), surely i will need a loop. can anyone help me or guide me on the getting values with the loop into createDataset()?

18 years ago

Java in General

Passing objects to different methods

As you can see that
"public static IntervalCategoryDataset createDataset()" want to get the data and attributes from storeStartDate and storeEndDate methods. i have class files, StartDate and EndDate that contains all the accessor methods. after i have store the relevant attributes, i want to call it out in the "public static IntervalCategoryDataset createDataset()" method to manipulate it.

i hope that my question doesn't confuse you all. hope that you all can guide me on this. Thank you

package ericTest;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.text.ParseException;
import java.util.StringTokenizer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Calendar;
import java.util.Date;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.category.IntervalCategoryDataset;
import org.jfree.data.gantt.Task;
import org.jfree.data.gantt.TaskSeries;
import org.jfree.data.gantt.TaskSeriesCollection;
import org.jfree.data.time.SimpleTimePeriod;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import Gantt.Chart;
import com.db4o.Db4o;
import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;
public class GanttDemo3 extends ApplicationFrame {
private static ObjectContainer db;
private static String day;
private static String month;
private static String year;
private static String task;
private static String startDate;
private static String endDate;
private static String startDay;
private static String startMonth;
private static String startYear;
public static int startDay1;
public static int startMonth1;
public static int startYear1;
public static int startDay2;
public static int startMonth2;
public static int startYear2;
public static String endDay;
public static String endMonth;
public static String endYear;
public static int endDay1;
public static int endMonth1;
public static int endYear1;
public static int endDay2;
public static int endMonth2;
public static int endYear2;
DataInputStream dis = null;
String fileRecord = null;
public GanttDemo3(final String title) {
super(title);
final IntervalCategoryDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
// add the chart to a panel...
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
public final static String filename = "C:\\KLGCC Mock Up.yap";
public void storeData() throws IOException{
new File(filename).delete();
db = Db4o.openFile(filename);
File f = new File("C:\\KLGCC Mock Up.txt");
FileReader fis = new FileReader(f);
BufferedReader bis = new BufferedReader(fis);
while((fileRecord = bis.readLine()) != null){
StringTokenizer st = new StringTokenizer(fileRecord,",");
task = st.nextToken();
startDate = st.nextToken();
endDate = st.nextToken();
Country c = new Country(task, startDate, endDate);
db.set(c);
}
db.close();
}
public void storeStartDate() throws ParseException{
db = Db4o.openFile(filename);
Country c = new Country();
ObjectSet result = db.get(c);
while(result.hasNext()){
Country obj = (Country)result.next();
String sDate = obj.getStartDate();
StringTokenizer str = new StringTokenizer(sDate, "/");
startMonth = str.nextToken();
startDay = str.nextToken();
startYear = str.nextToken();
int startMonth1 = Integer.parseInt(startMonth);
int startDay1 = Integer.parseInt(startDay);
int startYear1 = Integer.parseInt(startYear);
StartDate sd = new StartDate(startDay1, startMonth1, startYear1);
ArrayList<Integer> startDay2 = new ArrayList<Integer>();
startDay2.add(startDay1);
ArrayList<Integer> startMonth2 = new ArrayList<Integer>();
startMonth2.add(startMonth1);
ArrayList<Integer> startYear2 = new ArrayList<Integer>();
startYear2.add(startYear1);
}
db.close();
}
public void storeEndDate() throws ParseException{
db = Db4o.openFile(filename);
Country c = new Country();
ObjectSet result = db.get(c);
while(result.hasNext()){
Country obj = (Country)result.next();
String sEndDate = obj.getEndDate();
StringTokenizer str1 = new StringTokenizer(sEndDate, "/");
endMonth = str1.nextToken();
endDay = str1.nextToken();
endYear = str1.nextToken();
int endMonth1 = Integer.parseInt(endMonth);
int endDay1 = Integer.parseInt(endDay);
int endYear1 = Integer.parseInt(endYear);
EndDate ed = new EndDate(endDay1, endMonth1, endYear1);
ArrayList<Integer> endDay2 = new ArrayList<Integer>();
endDay2.add(startDay1);
ArrayList<Integer> endMonth2 = new ArrayList<Integer>();
endMonth2.add(endMonth1);
ArrayList<Integer> endYear2 = new ArrayList<Integer>();
endYear2.add(endYear1);
}
db.close();
}
public static IntervalCategoryDataset createDataset() {
final TaskSeries s1 = new TaskSeries("Scheduled");
StartDate sd = new StartDate(startDay1, startMonth1, startYear1);
EndDate ed = new EndDate(endDay1, endMonth1, endYear1);
s1.add(new Task(task,
new SimpleTimePeriod(date(sd.getStartDay1(),sd.getStartDay1(), sd.getStartYear1()),
date(ed.getEndDay1(), ed.getEndMonth1(), ed.getendYear1()))));
System.out.println("dumb");
final TaskSeriesCollection collection = new TaskSeriesCollection();
collection.add(s1);
return collection;
}
/**
* Utility method for creating <code>Date</code> objects.
*
* @param day the date.
* @param month the month.
* @param year the year.
*
* @return a date.
*/
private static Date date(final int startDay2, final int startMonth2, final int startYear2) {
System.out.println("sdojsodj");
final Calendar calendar = Calendar.getInstance();
calendar.set(startYear2, startMonth2, startDay2);
final Date result = calendar.getTime();
return result;
}
/**
* Creates a chart.
*
* @param dataset the dataset.
*
* @return The chart.
*/
private JFreeChart createChart(final IntervalCategoryDataset dataset) {
final JFreeChart chart = ChartFactory.createGanttChart(
"Gantt Chart Demo", // chart title
"Task", // domain axis label
"Date", // range axis label
dataset, // data
true, // include legend
true, // tooltips
false // urls
);
// chart.getCategoryPlot().getDomainAxis().setMaxCategoryLabelWidthRatio(10.0f);
return chart;
}
public static void main(final String[] args) throws IOException, ParseException
{
final GanttDemo3 demo = new GanttDemo3("Gantt Chart Demo 1");
demo.storeData();
demo.storeStartDate();
//demo.storeEndDate();
//demo.pack();
//RefineryUtilities.centerFrameOnScreen(demo);
//demo.setVisible(true);
}
}

18 years ago

Java in General

While Loop in Gantt Chart values

the problem is in the "createDataset" method whereby i want to do a while loop where i can check the data inside the database that i just inserted. after that i want to pass in all the data that is needed to generate the Gantt Chart. can anyone help me on this?
thanks

package ericTest;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.text.ParseException;
import java.util.StringTokenizer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Calendar;
import java.util.Date;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.category.IntervalCategoryDataset;
import org.jfree.data.gantt.Task;
import org.jfree.data.gantt.TaskSeries;
import org.jfree.data.gantt.TaskSeriesCollection;
import org.jfree.data.time.SimpleTimePeriod;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import com.db4o.Db4o;
import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;
public class GanttDemo3 extends ApplicationFrame {
public GanttDemo3(final String title) {
super(title);
final IntervalCategoryDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
// add the chart to a panel...
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
public final static String filename = "C:\\KLGCC Mock Up.yap";
private static ObjectContainer db;
private static String day;
private static String month;
private static String year;
private static String task;
private static String startDate;
private static String endDate;
private static String startDay;
private static String startMonth;
private static String startYear;
public static int startDay1;
public static int startMonth1;
public static int startYear1;
public static String endDay;
public static String endMonth;
public static String endYear;
public static int endDay1;
public static int endMonth1;
public static int endYear1;
DataInputStream dis = null;
String fileRecord = null;
public void storeData() throws IOException{
new File(filename).delete();
db = Db4o.openFile(filename);
File f = new File("C:\\KLGCC Mock Up.txt");
FileReader fis = new FileReader(f);
BufferedReader bis = new BufferedReader(fis);
while((fileRecord = bis.readLine()) != null){
StringTokenizer st = new StringTokenizer(fileRecord,",");
task = st.nextToken();
startDate = st.nextToken();
endDate = st.nextToken();
System.out.println(task+ " - " +startDate+ " - " +endDate);
Country c = new Country(task, startDate, endDate);
db.set(c);
}
db.close();
}
public void storeStartDate() throws ParseException{
db = Db4o.openFile(filename);
Country c = new Country();
ObjectSet result = db.get(c);
while(result.hasNext()){
Country obj = (Country)result.next();
String sDate = obj.getStartDate();
StringTokenizer str = new StringTokenizer(sDate, "/");
startMonth = str.nextToken();
startDay = str.nextToken();
startYear = str.nextToken();
System.out.println(startYear);
int startMonth1 = Integer.parseInt(startMonth);
int startDay1 = Integer.parseInt(startDay);
int startYear1 = Integer.parseInt(startYear);
//startMonth1 = startMonth1 + 1;
ArrayList<Integer> startDay2 = new ArrayList<Integer>();
startDay2.add(startDay1);
ArrayList<Integer> startMonth2 = new ArrayList<Integer>();
startMonth2.add(startMonth1);
ArrayList<Integer> startYear2 = new ArrayList<Integer>();
startYear2.add(startYear1);
System.out.println("Heloo" +startDay2+ "/" +startMonth2+ "/" +startYear2);
}
db.close();
}
public void storeEndDate() throws ParseException{
db = Db4o.openFile(filename);
Country c = new Country();
ObjectSet result = db.get(c);
while(result.hasNext()){
Country obj = (Country)result.next();
String sEndDate = obj.getEndDate();
StringTokenizer str1 = new StringTokenizer(sEndDate, "/");
endMonth = str1.nextToken();
endDay = str1.nextToken();
endYear = str1.nextToken();
int endMonth1 = Integer.parseInt(endMonth);
int endDay1 = Integer.parseInt(endDay);
int endYear1 = Integer.parseInt(endYear);
ArrayList<Integer> endDay2 = new ArrayList<Integer>();
endDay2.add(startDay1);
ArrayList<Integer> endMonth2 = new ArrayList<Integer>();
endMonth2.add(endMonth1);
ArrayList<Integer> endYear2 = new ArrayList<Integer>();
endYear2.add(endYear1);
System.out.println("END" +endDay2+ "/" +endMonth2+ "/" +endYear2);
}
db.close();
}
public static IntervalCategoryDataset createDataset() {
final TaskSeries s1 = new TaskSeries("Scheduled");
//Country chart = new Country();
ArrayList ar = new Arraylist;
Iterator it = ar.iterator();
while it.hasNext();{
s1.add(new Task("abc",
new SimpleTimePeriod(date(startDay1, startMonth1, startYear1),
date(endDay1, endMonth1, endYear1))));
}
final TaskSeriesCollection collection = new TaskSeriesCollection();
collection.add(s1);
return collection;
}
/**
* Utility method for creating <code>Date</code> objects.
*
* @param day the date.
* @param month the month.
* @param year the year.
*
* @return a date.
*/
private static Date date(final int day, final int month, final int year) {
final Calendar calendar = Calendar.getInstance();
calendar.set(year, month, day);
final Date result = calendar.getTime();
return result;
}
/**
* Creates a chart.
*
* @param dataset the dataset.
*
* @return The chart.
*/
private JFreeChart createChart(final IntervalCategoryDataset dataset) {
final JFreeChart chart = ChartFactory.createGanttChart(
"Gantt Chart Demo", // chart title
"Task", // domain axis label
"Date", // range axis label
dataset, // data
true, // include legend
true, // tooltips
false // urls
);
// chart.getCategoryPlot().getDomainAxis().setMaxCategoryLabelWidthRatio(10.0f);
return chart;
}
public static void main(final String[] args) throws IOException, ParseException
{
final GanttDemo3 demo = new GanttDemo3("Gantt Chart Demo 1");
demo.storeData();
demo.storeStartDate();
demo.storeEndDate();
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}

18 years ago

Java in General

Calendar class

This is one part of my coding to generate a Gantt Chart.
the problem is how can i convert from my chart.java that i kept the month integer to be put into the calendar in this codes below. as you can see that i retrieve from chart class the start day and the year also. but the calendar, i am not sure how. can anyone guide me on this?

thanks

this is my chart.java. where i set and get all the values

package Gantt;
public class Chart {
private String title="MyNameIsEricTan";
private int startDay=10;
private int startMonth=4;
private int startYear=2006;
private int endDay=28;
private int endMonth=4;
private int endYear=2006;
public Chart ()
{
this.title = title;
this.startDay = startDay;
this.startMonth = startMonth;
this.startYear = startYear;
this.endDay = endDay;
this.endMonth = endMonth;
this.endYear = endYear;
}
public void setTitle(String title)
{
this.title = title;
}
public void setStartDay(int startDay)
{
this.startDay = startDay;
}
public void setStartMonth(int startMonth)
{
this.startMonth = startMonth;
}
public void setStartYear(int startYear)
{
this.startYear = startYear;
}
public void setEndDay(int endDay)
{
this.endDay = endDay;
}
public void setEndMonth(int endMonth)
{
this.endMonth = endMonth;
}
public void setEndYear(int endYear)
{
this.endYear = endYear;
}
public String getTitle()
{
return title;
}
public int getStartDay()
{
return startDay;
}
public int getStartMonth()
{
return startMonth;
}
public int getStartYear()
{
return startYear;
}
public int getEndDay()
{
return endDay;
}
public int getEndMonth()
{
return endMonth;
}
public int getEndYear()
{
return endYear;
}
}

18 years ago

Java in General

Converting Date into Day, Month, Year

this is a workable sample i got the net. i want to ask some help on, how to retrieve just the day or the month from the startDate? for example, 2001-01-01... so if i want to display the day, it's going to print out "01". how can i do that? can anyone guide me one this? i tried on the codes that i just bold on. but still got error

18 years ago

Java in General

Converting Date into Day, Month, Year

yea. i got what you meant. look through it already. thanks alot for the info. now i have small little problem. as everyone know that i am using Stringtokenizer to read the token to token. the problem i tried how to embed the SimpleDateFormat into StringTokenizer to read it into day, month, year but fail. can anyone guide me on this?

and another update is, the user that pass me the text file successfully grab it without have the day together the date
so the text file will be read in this way

Testing,12/15/06,12/15/06

so this will be the new type of data that i have to read. another issue is, can i use StringTokenizer to start reading only from the 2nd line because the 1st line is just the header of the file??

thanks alot guys. for your help. really appreciate it

18 years ago

Java in General

Converting Date into Day, Month, Year

I have a text file that shows like this in every row

Testing,Fri 12/15/06,Fri 12/15/06,0 hrs

i will be using a delimiter to tokenized it by the symbol " , ". the problem now is the text files contain the day and date together as one attribute. how can i cut the day off and just read the date and split the dates into month/day/year? so that i can generate the gantt chart using this values?

can anyone help me on this? Thanks

18 years ago

Java in General

Dynamic Value in File Reader

The one that i highlighted, before that it was a hard code whereby i specific the location of the file. Now i allow the user to browse the file that wanted to be uploaded to the server. I declared in italic. the bold would the value of the parent class inherit into an object and stored the value after executing the method

hope that you all don't if my explanation is quite confusing

Thanks alot.

TokenTest.java
--------------------------------------------------------------

package test;
import java.io.*;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.File;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;
import test.Country;
import com.db4o.*;
import com.db4o.query.Query;
public class TokenTest {
public final static String filename = "abc.yap";
final String pic = "C://CountryPieChart.jpg";
public String record;
public int value;
public String cName1;
private ObjectSet result;
private DefaultPieDataset dataset;
private JFreeChart chart1;
private String chart;
private static ObjectContainer db;
public void storeData(){
// delete existing data file
new File(filename).delete();
//open database
db = Db4o.openFile(filename);
DataInputStream dis = null;
String dbRecord = null;
[B]TextFile tf = new TextFile();
String txtname1 = tf.getTxtName();[/B]
try {
File f = new File([I]txtname1[/I]);
FileReader fis = new FileReader(f);
BufferedReader bis = new BufferedReader(fis);
// read the first record of the database
while ( (dbRecord = bis.readLine()) != null) {
StringTokenizer st = new StringTokenizer(dbRecord, "|");
String country = st.nextToken();
String countryPopulation = st.nextToken();
Country c1 = new Country(country,countryPopulation);
//Country c2 = new Country(fname,lname, city, state);
db.set(c1);
}
} catch (IOException e) {
// catch io errors from FileInputStream or readLine()
System.out.println("Uh oh, got an IOException error: " + e.getMessage());
} finally {
// if the file opened okay, make sure we close it
if (dis != null) {
try {
dis.close();
} catch (IOException ioe) {
System.out.println("IOException error trying to close the file: " +
ioe.getMessage());
}
} // end if
} // end finally
} // end storeData
public void RetrieveData1(){
db = Db4o.openFile(filename);
Query query = db.query();
query.constrain(Country.class);
ObjectSet result = query.execute();
while(result.hasNext()){
System.out.println(result.next());
}
}
public ArrayList RetrieveData2() {
db = Db4o.openFile(filename);
Query query = db.query();
query.constrain(Country.class);
result = query.execute();
ArrayList list = new ArrayList();
if(result.hasNext()){
for(int i=0; i<result.size(); i++){
list.add(result.next());
}
}else{
System.out.println("Error");
}
return list;
}
public String DisplayChart(){
db = Db4o.openFile(filename);
Query query = db.query();
query.constrain(Country.class);
result = query.execute();
dataset = new DefaultPieDataset();
while(result.hasNext()){
Country c1 = (Country) result.next();
int a = Integer.parseInt(c1.getCountryPopulation());
dataset.setValue(c1.getCountry(), a);
System.out.println(a);
}
chart1 = ChartFactory.createPieChart(
"Sample Chart",
dataset,
true, //Display the field
true,
false);
try {
//save the pie chart as JPEG file
ChartUtilities.saveChartAsJPEG(new File(pic), chart1, 500, 300);
chart = "C://CountryPieChart.jpg";
} catch(Exception e) {
System.out.println("Problem for creating chart");
}
return chart;
}
public static void main (String[] args){
TokenTest tt = new TokenTest();
tt.storeData();
tt.RetrieveData2();
tt.DisplayChart();
}
} //end class

TextFile.java
--------------------------------------------------------------

18 years ago

JSP