Java GUI之位置控制與尺寸控制

以下四個類都包含在java.awt包內。

1. Toolkit類：

Toolkit類是一個包含了本機系統屬性和參數的抽象類，比如Clipboard內容、光標、桌面屬性、字體族、顏色類型、屏幕參數和系統事件。

2. Dimension類：

Dimension類通常用來獲取或設置組件的尺寸。與Toolkit類配合使用，則可以獲取屏幕尺寸。

3. GraphicsEnvironment類：

GraphicsEnvironment類是一個包含本級系統圖像環境的類。

4. Rectangle類：

Rectangle類是矩形類。

1. package com.sinosuperman.driver;
3. import java.awt.Dimension;
4. import java.awt.GraphicsEnvironment;
5. import java.awt.Point;
6. import java.awt.Rectangle;
7. import java.awt.Toolkit;
9. public class MainBench {
10. public static void main(String[] args) {
11. // Get a Toolkit object containing system properties and parameters.
12. Toolkit tk = Toolkit.getDefaultToolkit();
13. // Get a Dimension object containing screen size.
14. Dimension d = tk.getScreenSize();
15. // Get the screen width.
16. System.out.println(d.getWidth());
17. // Get the screen height.
18. System.out.println(d.getHeight());
20. // Get a GraphicsEnvironment object containing system graphics environment.
21. GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
22. // Get a Rectangle object containing the maximum window bounds of current window.
23. Rectangle rec = environment.getMaximumWindowBounds();
24. // Get the x-coordinate of the center point of rec.
25. System.out.println(rec.getCenterX());
26. // Get the y-coordinate of the center point of rec.
27. System.out.println(rec.getCenterY());
28. System.out.println(rec);
30. // Get the center point of system graphics environment.
31. Point point = environment.getCenterPoint();
32. System.out.println(point);
34. // Get the location of rec.
35. point = rec.getLocation();
36. System.out.println(point);
37. }
38. }