简单计算器界面



import java.awt.Button;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.TextField;

public class Xi{
  public static void main(String[] args) {
     Frame a=new Frame("计算机");
     //创建窗体
     Panel b=new Panel();
     //创建panel容器
     b.add(new TextField(20));
     //向panel容器加组件
     a.add(b,"North");
     //往Frame窗体默认的BorderLayout加组件
     Panel c=new Panel();
     c.setLayout(new GridLayout(3,5,4,4));
     //使用setLayout布局管理器
     String[] mm={"0","1","2","3","4","5","6",
      "7", "8","9","+","-","*","/","="};   
     for (String string : mm) {
     c.add(new Button(string));
     }
     a.add(c);
     //向Frame窗体加Panel对象
     a.pack();
     //设置窗体最佳大小
     a.setVisible(true);
     //窗体显示出来
    }
}