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Using a SpringLayout Manager

Allows components to have their position defined by "springs" or "struts " fixed to an edge of the container or another component in the container. import java.awt.Container; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.Spring; import javax.swing.SpringLayout; public class TrySpringLayout {   public static void main(String[] args) {     JFrame aWindow = new JFrame("This is a Spring Layout");     aWindow.setBounds(30, 30, 300, 300);     aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     SpringLayout layout = new SpringLayout();     Container content = aWindow.getContentPane();     content.setLayout(layout);     JButton[] buttons = new JButton[6];     SpringLayout.Constraints constr = null;     for (int i = 0; i < buttons.length; i++) {       buttons[i] = new JButton("Press " + (i + 1));       content.add(buttons[i]);     }     Spring xSpring = Spring.constant(5, 15, 25);     Spring ySpring = Spring.constant(10, 30, 50);     constr = layout.getConstraints(buttons[0]);     constr.setX(xSpring);     constr.setY(ySpring);     // Hook buttons together with springs     for (int i = 1; i < buttons.length; i++) {       constr = layout.getConstraints(buttons[i]);       layout.putConstraint(SpringLayout.WEST, buttons[i], xSpring, SpringLayout.EAST,           buttons[i - 1]);       layout.putConstraint(SpringLayout.NORTH, buttons[i], ySpring, SpringLayout.SOUTH,           buttons[i - 1]);     }     aWindow.setVisible(true); // Display the window   } }