Use the setMinimumSize() method to set the minimum size limit for a JFrame −
JFrame frame = new JFrame();
frame.setMinimumSize(new Dimension(500, 300));
The following is an example to set minimum size limit for a JFrame −
Example
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JButton;
import javax.swing.JFrame;
public class SwingDemo {
public static void main(String[] args) {
JFrame frame = new JFrame();
JButton button = new JButton("Close!");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(button);
button.addActionListener(e -> {
frame.dispose();
});
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setMinimumSize(new Dimension(500, 300));
frame.getContentPane().setBackground(Color.ORANGE);
frame.pack();
frame.setVisible(true);
}
}
Output