How to align multiple buttons with different height in Java?

To align multiple buttons with different height in Java, try the following example, Here, we have set 5 buttons with GridBagConstraints −

GridBagConstraints constraints = new GridBagConstraints();
constraints.insets = new Insets(5, 5, 5, 5);
constraints.anchor = GridBagConstraints.WEST;

In addition, to set different height for different buttons, we have used −

component. getPreferredSize().height

The following is an example to align multiple buttons with different height −

Example

package my;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SwingDemo {
   public static void main(String[] args) {
      final JFrame frame = new JFrame(SwingDemo.class.getSimpleName());
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      JPanel panel = new JPanel(new GridBagLayout());
      GridBagConstraints constraints = new GridBagConstraints();
      constraints.insets = new Insets(5, 5, 5, 5);
      constraints.anchor = GridBagConstraints.WEST;
      JButton btn1 = new JButton("1");
      panel.add(btn1, constraints);
      JButton btn2 = new JButton("2");
      btn2.setPreferredSize(new Dimension(btn1.getPreferredSize().width, btn1 .getPreferredSize().height + 30));
      panel.add(btn2, constraints);
      JButton btn3 = new JButton("3");
      btn3.setPreferredSize(new Dimension(btn2.getPreferredSize().width, btn2 .getPreferredSize().height + 20));
      panel.add(btn3, constraints);
      JButton btn4 = new JButton("4");
      btn4.setPreferredSize(new Dimension(btn2.getPreferredSize().width, btn3 .getPreferredSize().height + 5));
      panel.add(btn4, constraints);
      JButton btn5 = new JButton("5");
      btn5.setPreferredSize(new Dimension(btn2.getPreferredSize().width, btn3 .getPreferredSize().height + 50));
      panel.add(btn5, constraints);
      frame.add(panel);
      frame.pack();
      frame.setVisible(true);
   }
}

Output