Create a class OuterJFrame.java, extends JFrame.
package javajframeapplication;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
public class OuterJFrame extends JFrame{
public OuterJFrame(){
this.setTitle("Java-Buddy");
this.setSize(300, 200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton buttonExit = new JButton("Exit");
buttonExit.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
this.add(buttonExit);
}
}
Modify main class, instantiate OuterJFrame class in main() method.
package javajframeapplication;
import javax.swing.SwingUtilities;
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaJFrameApplication {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
OuterJFrame myOuterJFrame = new OuterJFrame();
myOuterJFrame.setVisible(true);
}
});
}
}
We can also implement our custom JFrame as inner class. Refer:
- Create GUI application, by instantiating static inner class of JFrame.
- Create GUI application, by instantiating non-static inner class of JFrame.
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