java组件更改颜色方法

关键代码：new JButton().setBackground(new Color(255,255,255));

                  new JButton().setBackground(Color.RED);

示例：
import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;


public class MyChessCover2 extends JFrame {
	public static int k=8;
	public MyChessCover2(){
		Container co=getContentPane();
		JPanel p1=new JPanel(new GridLayout(k,k,1,1));		
		JButton jb[]=new JButton[k*k]; 
		int r,g,b;
		for(int i=0;i<(k*k);i++){
			 r=(int)(Math.random()*100);
			 g=(int)(Math.random()*100);
			 b=(int)(Math.random()*100);
			jb[i]=new JButton();
			jb[i].setBackground(new Color(r,g,b));
			p1.add(jb[i]);
		}
		co.add(p1);
		setSize(300,300);
		setResizable(false);
		setVisible(true);
		setTitle("颜色设置");
		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new MyChessCover2();

	}

}

结果如图：