SpringLayout的使用

import java.awt.*;import javax.swing.*;public class SpringFormTest {  public static void main(String args[]) {    JFrame frame = new JFrame("Spring Form");    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    Container contentPane = frame.getContentPane();    SpringLayout layout = new SpringLayout();    contentPane.setLayout(layout);    Component left = new JLabel("Left");    Component right = new JTextField(15);    contentPane.add(left);    contentPane.add(right);    layout.putConstraint(SpringLayout.WEST,  left, 10,      SpringLayout.WEST,  contentPane);    layout.putConstraint(SpringLayout.NORTH, left, 25,      SpringLayout.NORTH, contentPane);    layout.putConstraint(SpringLayout.NORTH, right, 25,      SpringLayout.NORTH, contentPane);    layout.putConstraint(SpringLayout.WEST, right, 20,      SpringLayout.EAST, left);    frame.setSize(300, 100);    frame.show();  }}