counterframe.java

java语言开发的计算器

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CounterFrame{
	Frame f = new Frame("counter");
	TextField  tf1 = new TextField(20);
	Panel p = new Panel();
	Button[] b = new Button[21];
	String[] s = {"退格","CE","C","/",
					"7","8","9","*",
					"4","5","6","-",
					"1","2","3","+",
					"0","+/-",".","="};
	public CounterFrame(){
		tf1.setForeground(Color.black);
		tf1.setFont(new Font("Arial Black",1,20));
		
		for(int i=1;i<21;i++){
			b[i] = new Button(s[i-1]);
			b[i].setFont(new Font("仿宋",1,15));	
		}
		
		p.setLayout(new GridLayout(5,4,3,3));
		p.setBackground(Color.LIGHT_GRAY);
		for(int i=1;i<21;i++){	 
			p.add(b[i]);
			b[i].setBackground(new Color(20,130,180));
			b[i].setForeground(Color.yellow);
		}
		for(int i=1;i<4;i++){
			b[i].setBackground(new Color(120,180,170));
			b[i].setForeground(Color.blue);
		}
		for(int i=1;i<=4;i++){	  
			b[i*4].setBackground(new Color(120,180,170));
			b[i*4].setForeground(Color.red);
		}
		b[20].setBackground(Color.red);
		f.setLayout(new BorderLayout(3,3));
		f.add(tf1,"North");
		f.add(p,"Center");
		f.setSize(300,200);
		f.setLocation(300,300);
		f.setBackground(Color.LIGHT_GRAY);
		f.setResizable(false);
		f.setVisible(true);
		
	}
	public static void main(String args[]){ 	          
		new CounterFrame();
	}
}