一个简单java布局管理器

import java.awt.*;
public class ExGui {
private Frame f;
private Button b1;
private Button b2;
public static void main(String[] args) {
ExGui that=new ExGui();
that.go();

}
public  void go() {
f=new Frame("GUI example");
f.setLayout(new FlowLayout());
b1=new Button("确定");
b2=new Button("取消");
f.add(b1);
f.add(b2);
f.pack();
f.setVisible(true);

}

}