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How can we minimize/maximize a JFrame programmatically in Java?
A JFrame class is a subclass of Frame class and the components added to a frame are referred to as its contents, these are managed by the contentPane. A JFrame contains a window with title, border, (optional) menu bar and user-specific components. By default, we can minimize a JFrame by clicking on minimize button and maximize a JFrame by clicking on maximize button at the top-right position of the screen. We can also do programmatically by using setState(JFrame.ICONIFIED) to minimize a JFrame and setState(JFrame.MAXIMIZED_BOTH) to maximize a JFrame.
Example
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JFrameIconifiedTest extends JFrame implements ActionListener {
private JButton iconifyButton, maximizeButton;
public JFrameIconifiedTest() {
setTitle("JFrameIconified Test");
iconifyButton = new JButton("JFrame Iconified");
add(iconifyButton, BorderLayout.NORTH);
iconifyButton.addActionListener(this);
maximizeButton = new JButton("JFrame Maximized");
add(maximizeButton, BorderLayout.SOUTH);
maximizeButton.addActionListener(this);
setSize(400, 275);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
}
public void actionPerformed(ActionEvent ae) {
if(ae.getSource().equals(iconifyButton)) {
setState(JFrame.ICONIFIED); // To minimize a frame
} else if(ae.getSource().equals(maximizeButton)) {
setExtendedState(JFrame.MAXIMIZED_BOTH); // To maximize a frame
}
}
public static void main(String args[]) {
new JFrameIconifiedTest();
}
}Output
In the above program, if we click on "JFrame Iconified" button, the frame is minimized and click on "JFrame Maximized" button, the frame is maximized.
Updated on: 10-Feb-2020
3K+ Views
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