菜鸟求助，围棋界面颜色如何更改，谢谢
import java.awt.*; 
class TestGridLayout extends Frame{ 
public static void main(String[] args){ 
TestGridLayout tgl=new TestGridLayout(); 
tgl.setTitle("围棋界面"); 
tgl.setSize(300,300); 
GridLayout grid=new GridLayout(9,9); 

grid.setHgap(0); 
grid.setVgap(0); 

tgl.setLayout(grid); 

for(int i=0;i<=80;i++){ 
tgl.add(new Button()); 
} 
tgl.setVisible(true); 


} 
}我想把围棋棋盘的颜色设为黄色，请问怎么修改程序，谢谢

------解决方案--------------------

Java code

        for(int i=0;i<=80;i++){  
            Button btn = new Button();             
            tgl.add(btn);
            Color c = new Color(255,255,0);                
            btn.setBackground(c);
        }