util.java

java 写的几个图型程序

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   Util.java

package sGraphics;

import java.applet.Applet;
import java.awt.*;

// Referenced classes of package sGraphics:
//            Assert

public class Util
{

    public Util()
    {
    }

    public static Dialog getDialog(Component component)
    {
        if(component instanceof Dialog)
            return (Dialog)component;
        while((component = component.getParent()) != null) 
            if(component instanceof Dialog)
                return (Dialog)component;
        return null;
    }

    public static Frame getFrame(Component component)
    {
        if(component instanceof Frame)
            return (Frame)component;
        while((component = component.getParent()) != null) 
            if(component instanceof Frame)
                return (Frame)component;
        return null;
    }

    public static Applet getApplet(Component component)
    {
        if(component instanceof Applet)
            return (Applet)component;
        while((component = component.getParent()) != null) 
            if(component instanceof Applet)
                return (Applet)component;
        return null;
    }

    public static void waitForImage(Component component, Image image)
    {
        MediaTracker mediatracker = new MediaTracker(component);
        try
        {
            mediatracker.addImage(image, 0);
            mediatracker.waitForID(0);
        }
        catch(InterruptedException interruptedexception)
        {
            interruptedexception.printStackTrace();
        }
    }

    public static void wallPaper(Component component, Graphics g, Image image)
    {
        Dimension dimension = component.getSize();
        waitForImage(component, image);
        int i = image.getWidth(component);
        int j = image.getHeight(component);
        Assert.notFalse(i != -1 && j != -1);
        for(int k = 0; k < dimension.width; k += i)
        {
            for(int l = 0; l < dimension.height; l += j)
                g.drawImage(image, k, l, component);

        }

    }

    public static void stretchImage(Component component, Graphics g, Image image)
    {
        Dimension dimension = component.getSize();
        waitForImage(component, image);
        g.drawImage(image, 0, 0, dimension.width, dimension.height, component);
    }

    public static void setCursor(int i, Component component)
    {
        component.setCursor(Cursor.getPredefinedCursor(i));
    }

    public static boolean isMicrosoft()
    {
        String s = System.getProperty("java.vendor").toLowerCase();
        return s.startsWith("microsoft");
    }
}