How to set Focus for Jcomponent such as JTextField, JRadioButton etc

First, when you create the component, you need to set it's requestFocusEnabled:
  JComponent myComp = new JComponent();
  myComp.setRequestFocusEnabled(true);
 
//then you request the focus:
  myComp.requestFocus();

That should do it!

Laminamia

I have try it out, it doesn't work.
Pls note that I used JPanel to
Layout these JComponets.
Sometime, Panel within Panel.
Any probelm to set focus for such layout ?

Thanks
Phua

hi heng03....
Invoke setFocus() after setVisible(). And add a line that disable request focus of the default component that has the focus by using setRequestFocusEnabled(false). By default, the requestFocus is enabled.

See code below...

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test extends JFrame {
    JTextField field1, field2, field3, field4;

    public Test(String title) {
        super(title);
        setLocation(300,220);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        JPanel myPanel = new JPanel();
        field1 = new JTextField("field1");
        field2 = new JTextField("field2");
        field3 = new JTextField("field3");
        field4 = new JTextField("field4");

        myPanel.add(field1);
        myPanel.add(field2);
        myPanel.add(field3);
        myPanel.add(field4);
        getContentPane().add(myPanel);
        pack();
        setVisible(true);
        field1.setRequestFocusEnabled(false); //disable field1 from requesting focus
        field3.requestFocus();
    }

    public static void main(String[] args) {
        Test myframe = new Test("Test");
    }
}

Hope this helped...

Jerson

hi heng03....
Invoke setFocus() after setVisible(). And add a line that disable request focus of the default component that has the focus by using setRequestFocusEnabled(false). By default, the requestFocus is enabled.

See code below...

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test extends JFrame {
    JTextField field1, field2, field3, field4;

    public Test(String title) {
        super(title);
        setLocation(300,220);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        JPanel myPanel = new JPanel();
        field1 = new JTextField("field1");
        field2 = new JTextField("field2");
        field3 = new JTextField("field3");
        field4 = new JTextField("field4");

        myPanel.add(field1);
        myPanel.add(field2);
        myPanel.add(field3);
        myPanel.add(field4);
        getContentPane().add(myPanel);
        pack();
        setVisible(true);
        field1.setRequestFocusEnabled(false); //disable field1 from requesting focus
        field3.requestFocus();
    }

    public static void main(String[] args) {
        Test myframe = new Test("Test");
    }
}

Hope this helped...

Jerson

Sorry I accidentally refreshed the browser... :)

Hi jerch, pls answer to this question
instead of comment.
I'll grant you the points.

Thanks

Thanks

heng03