Java使用彈簧和支柱

Java使用彈簧和支柱：

1. package com.han;
3. import java.awt.Container;
5. import javax.swing.JButton;
6. import javax.swing.JFrame;
7. import javax.swing.Spring;
8. import javax.swing.SpringLayout;
10. /**
11. * 使用彈簧和支柱
12. * @author HAN
13. *
14. */
15. public class SpringLayout_1 extends JFrame {
17. /**
18. *
19. */
20. private static final long serialVersionUID = -5240773865528158419L;
22. public SpringLayout_1() {
23. // TODO Auto-generated constructor stub
24. Container container = getContentPane();
25. SpringLayout springLayout = new SpringLayout();
26. container.setLayout(springLayout);
27. JButton buttonL = new JButton("buttonL");
28. JButton buttonR = new JButton("buttonR");
29. container.add(buttonL);
30. container.add(buttonR);
31. Spring vST = Spring.constant(5);
32. Spring hSP = Spring.constant(10, 30, 40); // the values are not very significative
34. springLayout.putConstraint(SpringLayout.NORTH, buttonR, 0,
35. SpringLayout.NORTH, buttonL);
36. springLayout.putConstraint(SpringLayout.NORTH, buttonL, vST,
37. SpringLayout.NORTH, container);
38. springLayout.putConstraint(SpringLayout.WEST, buttonL, hSP,
39. SpringLayout.WEST, container);
40. springLayout.putConstraint(SpringLayout.EAST, container, hSP,
41. SpringLayout.EAST, buttonR);
42. springLayout.putConstraint(SpringLayout.WEST, buttonR, Spring.scale(hSP, 2),
43. SpringLayout.EAST, buttonL);
44. }
46. /**
47. * @param args
48. */
49. public static void main(String[] args) {
50. // TODO Auto-generated method stub
51. SpringLayout_1 frame = new SpringLayout_1();
52. frame.setTitle("使用彈簧和支柱");
53. frame.setVisible(true);
54. frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
55. frame.setBounds(100, 100, 600, 100);
56. }
58. }