计算器

 1     import java.awt.BorderLayout;
 2     import java.awt.Color;
 3     import java.awt.GridLayout;
 4 
 5     import javax.swing.*;
 6     public class ccccc{
 7         JFrame f;
 8         JPanel p;
 9         JTextField t;
10         JButton jb[];
11         GridLayout gi;
12         String title[]={"7","8","9","/","4","5","6","*","1","2","3","-","0",".","=","+"};
13         public ccccc(){
14              f=new JFrame();
15             p=new JPanel();
16             t=new JTextField();
17             jb=new JButton[title.length];
18             gi=new GridLayout(4,4);
19             p.setLayout(gi);
20             for(int i=0;i<title.length;i++)
21             {
22                 jb[i]=new JButton(title[i]);
23                 p.add(jb[i]);
24             }
25             p.setBackground(Color.gray);
26             f.add(t,BorderLayout.NORTH);
27             f.add(p,BorderLayout.CENTER);
28             f.add(p);
29             f.setSize(300,300);
30             f.setVisible(true);
31         }
32         public static void main(String[] args){
33             new ccccc();
34         }
35     }