usecolor.java

用户输入自己想要的颜色即可实现

/**
   p242
   e.g. 8.6
   定义并使用颜色
*/
 
import java.awt.*;
import java.applet.*;


public class UseColor extends Applet {
	Color oldColor;
	String[] ParamName = {"red", "green", "blue"};
	int[] RGBarray= new int[3];
	 
	public void init() {
		for (int i = 0; i < ParamName.length; i++){
		    RGBarray[i] = Integer.parseInt(getParameter(ParamName[i]));
		}
	}

	public void paint(Graphics g) {		
		oldColor = g.getColor();
		g.setColor(new Color(RGBarray[0], RGBarray[1], RGBarray[2]));
		g.drawString("How do u think about Current color: " + g.getColor().toString(),
		           10, 20);
		g.setColor(oldColor);
		g.drawString("Back to old default color:" + g.getColor().toString(), 10 ,40);
		}
}