Updating an object from one class in another one

[Adrian Lukaszek]

Hey Guys. I have quite a riddle how to update object from one class in another one. More precisely I've got a JTable in one JFrame (wchich is obviously editable and might have different amount of rows as well) and want to import data from it to a Jtable which is located in another JFrame. The question is rather overall since I don't know how to refresh Integer neither:) Thanks in advance

	JButton btnImport = new JButton("Import");
		btnImport.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				DefaultTableModel model3=(DefaultTableModel) table1.getModel();
				for(int i=0; i<middlemethod.getcountRow();i++)
				model3.addRow(new Object[]{middlemethod.getMytable().getValueAt(i, 0),
                                middlemethod.getMytable().getValueAt(i, 1),
                                middlemethod.getMytable().getValueAt(i, 2),
                                middlemethod.getMytable().getValueAt(i, 3)});
				}
			
		});

[Les Morgan]

If you truly want to access one from the other, all you need do is add a reference to the object: You can do this with a parent object or in a 3rd object that has a reference to each and utilizing a setter in each class.

public class C1{
  C2 c = null; //reference to a C2 object
  public void setAccess(C2 c){
    this.c=c; //set the reference
  }
}
public class C2{
  C1 c = null; //reference to a C1 object
  pubic void setAccess(C1 c){
    this.c=c; //set the reference
  }
}
public class MyStuff{
  public static void main(String[] args){ //MyStuff has reference to c1 and c2
    C1 c1 = new C1();
    C2 c2 = new C2();
    c1.setAccess(c2);  //c1 has reference to c2
    c2.setAccess(c1);  //c2 has reference to c1
  }
}

[Adrian Lukaszek]

This is pretty clear for me. But I want to see changes in an object in the class C2 when object from class C1 is changed by user while program is working.

[Les Morgan]

Try it.

Adrian Lukaszek wrote:This is pretty clear for me. But I want to see changes in an object in the class C2 when object from class C1 is changed by user while program is working.

[Les Morgan]

Here ya go.

class C1{
  C2 c = null; //reference to a C2 object
  public void setAccess(C2 c){
    this.c=c; //set the reference
  }
  public void printIt(String s){
    System.out.println(s);
  }
}
class C2{
  public C1 c = null; //reference to a C1 object
  public void setAccess(C1 c){
    this.c=c; //set the reference
  }
  public void printIt(){
    System.out.println("This is printed by the C2 object");
    c.printIt("But this is the C1 object's printIt");
  }
}
public class Junk{
  public static void main(String[] args){ //MyStuff has reference to c1 and c2
    C1 c1 = new C1();
    C2 c2 = new C2();
    c1.setAccess(c2);  //c1 has reference to c2
    c2.setAccess(c1);//c2 has reference to c1
    c2.printIt();
    c2.c.printIt("And so is this--C1 object's printIt");
  }
}

Adrian Lukaszek wrote:This is pretty clear for me. But I want to see changes in an object in the class C2 when object from class C1 is changed by user while program is working.