Java tutorial
import java.awt.Component; import java.awt.Container; import java.awt.FlowLayout; import javax.swing.BorderFactory; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class YAxisAlignX { private static Container makeIt(String title, float alignment) { String labels[] = { "--", "----", "--------", "------------" }; JPanel container = new JPanel(); container.setBorder(BorderFactory.createTitledBorder(title)); BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS); container.setLayout(layout); for (int i = 0, n = labels.length; i < n; i++) { JButton button = new JButton(labels[i]); button.setAlignmentX(alignment); container.add(button); } return container; } public static void main(String args[]) { JFrame frame = new JFrame("Alignment Example"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container panel1 = makeIt("Left", Component.LEFT_ALIGNMENT); Container panel2 = makeIt("Center", Component.CENTER_ALIGNMENT); Container panel3 = makeIt("Right", Component.RIGHT_ALIGNMENT); Container contentPane = frame.getContentPane(); contentPane.setLayout(new FlowLayout()); contentPane.add(panel1); contentPane.add(panel2); contentPane.add(panel3); frame.pack(); frame.setVisible(true); } }