Java利用彈簧控制組件大小

Java利用彈簧控制組件大小：

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;
9. import javax.swing.SpringLayout.Constraints; // Constraints為SpringLayout的內部類
11. /**
12. * 利用彈簧控制組件大小
13. * @author HAN
14. *
15. */
16. public class SpringLayout_2 extends JFrame {
18. /**
19. *
20. */
21. private static final long serialVersionUID = -5240773865528158419L;
23. public SpringLayout_2() {
24. // TODO Auto-generated constructor stub
25. Container container = getContentPane();
26. SpringLayout springLayout = new SpringLayout();
27. container.setLayout(springLayout);
28. JButton buttonL = new JButton("buttonL");
29. JButton buttonR = new JButton("buttonR");
30. container.add(buttonL);
31. container.add(buttonR);
32. Spring vST = Spring.constant(5);
33. Spring hSP = Spring.constant(10, 60, 100);
35. springLayout.putConstraint(SpringLayout.NORTH, buttonR, 0,
36. SpringLayout.NORTH, buttonL);
37. springLayout.putConstraint(SpringLayout.NORTH, buttonL, vST,
38. SpringLayout.NORTH, container);
39. springLayout.putConstraint(SpringLayout.WEST, buttonL, hSP,
40. SpringLayout.WEST, container);
41. springLayout.putConstraint(SpringLayout.EAST, container, hSP,
42. SpringLayout.EAST, buttonR);
43. springLayout.putConstraint(SpringLayout.WEST, buttonR, Spring.scale(hSP, 2),
44. SpringLayout.EAST, buttonL);
46. Spring heightST = Spring.constant(60);
47. Spring widthSP = Spring.constant(60, 300, 600);
48. Constraints buttonLConstraints = springLayout.getConstraints(buttonL);
49. buttonLConstraints.setHeight(heightST);
50. buttonLConstraints.setWidth(widthSP);
51. Constraints buttonRConstraints = springLayout.getConstraints(buttonR);
52. buttonRConstraints.setHeight(heightST);
53. buttonRConstraints.setWidth(widthSP);
55. }
57. /**
58. * @param args
59. */
60. public static void main(String[] args) {
61. // TODO Auto-generated method stub
62. SpringLayout_2 frame = new SpringLayout_2();
63. frame.setTitle("利用彈簧控制組件大小");
64. frame.setVisible(true);
65. frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
66. frame.setBounds(100, 100, 600, 300);
67. }
69. }