usecolor.java

有大量的java的实例

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

public class UseColor extends Applet
{
	Color oldColor;	
	String[] ParamName = {"red","green","blue"};	//三个HTML参数的名称
	int[] RGBarray = new int[3];			//保存三色比例的数组

	public void init()
	{
	  for(int i=0;i<ParamName.length;i++)	//取得HTML文件指定的三色
		RGBarray[i] = Integer.parseInt(getParameter(ParamName[i]));
	}
	public void paint(Graphics g)
	{
	  oldColor = g.getColor();		//保存原有的缺省颜色
	  Color c1 = new Color(RGBarray[0],RGBarray[1],RGBarray[2]);//置新颜色

          g.setColor(c1);
	  g.drawString("How do you think about Current color:"
	     + g.getColor().toString(),10,20); //用新建颜色显示该颜色的三色分量
	  g.setColor(oldColor);		//恢复原有颜色
	  g.drawString("Back to old default color:"+  
                   g.getColor().toString(),10,40);
	}
}