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
}
}
