mainswingframe.java

用JAVA实现排序等简单算法的演示

package testContextModels;

import java.awt.*;
import javax.swing.*;

/**
 * 创建使用 Swing 界面所必须的主框架
 * @author Administrator
 *
 */
public class MainSwingFrame {
	// 获取显示器的宽度和高度，并置为公有属性，使用者可据此计算画框的位置
	public static final int screenWidth = 
			(int)Toolkit.getDefaultToolkit().getScreenSize().getWidth();
	public static final int screenHeight = 
			(int)Toolkit.getDefaultToolkit().getScreenSize().getHeight();
	// 设置主画框的缺省宽度和缺省位置
	private static int width = screenWidth-12 ;
	private static int height = screenHeight-85;
	private static int startX = 2;
	private static int startY = 0;
	private static JFrame frame;
	private static JPanel contentPane;

	// 使用私有的构造方法可防止使用者创建MainFrame对象，这是工具类的常见做法
	private MainSwingFrame() { }
	
	/**
	 * 不使用构造方法，而使用init()方法初始化，任何使用类MainFrame的程序必须先调用init()方法
	 */
	public static void init(String title) {
		frame = new JFrame(title);
		frame.setLocation(new Point(startX, startY));
		contentPane = (JPanel)frame.getContentPane();
		contentPane.setPreferredSize(new Dimension(width, height));
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void init(String title, int w, int h, int x, int y) {
		width = w;  height = h;  startX = x;  startY = y;
		init(title);
	}
	
	/**
	 * 初始化画框并设置画框的观感
	 */
	public static void init(String title, int w, int h, int x, int y, String lookAndFeel){
		try {
			if (lookAndFeel.equalsIgnoreCase("windows"))
				UIManager.setLookAndFeel(
						"com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
			else if (lookAndFeel.equalsIgnoreCase("system")) 
				UIManager.setLookAndFeel(
						UIManager.getSystemLookAndFeelClassName());
			else if (lookAndFeel.equalsIgnoreCase("motif"))
				UIManager.setLookAndFeel(
						"com.sun.java.swing.plaf.motif.MotifLookAndFeel");
			else UIManager.setLookAndFeel(
					UIManager.getCrossPlatformLookAndFeelClassName());
		} catch (Exception e) {}
		width = w;  height = h;  startX = x;  startY = y;
		init(title);
	}
	
	/**
	 * 使画框可见，从而启动整个GUI
	 */
	public static void start() { frame.pack();  frame.setVisible(true); }
	
	/**
	 * 获取画框的内容窗格，使用者可往此窗格添加所创建的GUI组件
	 */
	public static JPanel getContentPane() { return contentPane; }
	
	/**
	 * 获取画框，使用对话框和菜单的程序要直接基于画框本身
	 */
	public static JFrame getMainFrame() { return frame; }

	public static int getWidth() { return width; }
	public static int getHeight() { return height; }
	public static int getStartX() { return startX; }
	public static int getStartY() { return startY; }
}