java awt实现计算器功能

本文实例为大家分享了java awt实现计算器的具体代码，供大家参考，具体内容如下

上课老师演示了一遍他的写法，由于没给代码，因此按着他的思路撸了一遍，感觉还很简单。

代码以及解释如下：

import java.awt.gridlayout;
import java.awt.event.actionevent;
import java.awt.event.actionlistener;

import javax.swing.jbutton;
import javax.swing.jframe;
import javax.swing.jpanel;
import javax.swing.jtextfield;

public class caculate1 {
 static string s1="";
 static string s2="";
 static int f=9;
 static int num1=0,num2=0;
 public static void main(string[] args) {
 int x=0,y=0,z=0;
 jframe jf=new jframe( "我的计算器");
 jf.setbounds(0,0,300,400);
// jf.setbackground(bgcolor);
 jf.setvisible(true);
 jf.setdefaultcloseoperation(jframe.dispose_on_close);
 
 jtextfield show=new jtextfield("0");
 //此处为布局：也就是定义五个容器，（也可以理解为将定义的jframe空间分为5个容器）
 jpanel jp1=new jpanel(new gridlayout(1,3));//存储：
 jpanel jp2=new jpanel(new gridlayout(1,3));
 jpanel jp3=new jpanel(new gridlayout(1,3));
 jpanel jp4=new jpanel(new gridlayout(1,3));
 jpanel jp5=new jpanel(new gridlayout(1,3));
 
 jbutton bt_add=new jbutton("+");
 jbutton bt_sub=new jbutton("-");
 jbutton bt_mul=new jbutton("*");
 jbutton bt_div=new jbutton("/");
 jbutton bt_7=new jbutton("7");
 jbutton bt_8=new jbutton("8");
 jbutton bt_9=new jbutton("9");
 jbutton bt_4=new jbutton("4");
 jbutton bt_5=new jbutton("5");
 jbutton bt_6=new jbutton("6");
 jbutton bt_1=new jbutton("1");
 jbutton bt_2=new jbutton("2");
 jbutton bt_3=new jbutton("3");
 jbutton bt_0=new jbutton("0");
 jbutton bt_c=new jbutton("c");
 jbutton bt_equal=new jbutton("=");
 
 jf.setlayout(new gridlayout(6,1));
 //容器1 ：添加 '+','-','*','/'按钮
 jp1.add(bt_add);
 jp1.add(bt_sub);
 jp1.add(bt_mul);
 jp1.add(bt_div);
 //容器2：添加'7','8','9'按钮
 jp2.add(bt_7);
 jp2.add(bt_8);
 jp2.add(bt_9);
 //容器3：添加'4','5','6'按钮
 jp3.add(bt_4);
 jp3.add(bt_5);
 jp3.add(bt_6);
 //容器4：添加'1','2','3'按钮
 jp4.add(bt_1);
 jp4.add(bt_2);
 jp4.add(bt_3);
 //容器5：添加'0','c','='
 jp5.add(bt_0);
 jp5.add(bt_c);
 jp5.add(bt_equal);
 
 jf.add(show);
 jf.add(jp1);
 jf.add(jp2);
 jf.add(jp3);
 jf.add(jp4);
 jf.add(jp5);
//元素已经定义好了，思路也很简单：(1)jframe定义一个大容器jf,jf= 1个显示框(show)+5个容器，分别定义显示框和容器，
 //(2)类似树形添加元素的数据结构，为jf添加元素
 
 //下面便是时间监听了(又称加载驱动)
 bt_9.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+9;
  show.settext(s1);
  }
  
 });
 
 bt_8.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+8;
  show.settext(s1);
  }
  
 });
 
 bt_7.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+7;
  show.settext(s1);
  }
  
 });
 
 bt_6.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+6;
  show.settext(s1);
  }
  
 });
 
 bt_5.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+5;
  show.settext(s1);
  }
  
 });
 
 bt_4.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+4;
  show.settext(s1);
  }
  
 });
 
 bt_3.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+3;
  show.settext(s1);
  }
  
 });
 
 bt_0.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+0;
  show.settext(s1);
  }
  
 });
 
 bt_2.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+2;
  show.settext(s1);
  }
  
 });
 
 bt_1.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+1;
  show.settext(s1);
  }
  
 });
 
 bt_0.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  
  s1=s1+0;
  show.settext(s1);
  }
  
 });
 
 
 bt_equal.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  num1=integer.valueof(s2);
  num2=integer.valueof(s1);
  int z=0;
  char fg=' ';
  
  switch(f){
  case 0:
   z=num1+num2;
   fg='+';
   break;
  case 1:
   z=num1-num2;
   fg='-';
   break;
  case 2:
   z=num1*num2;
   fg='*';
   break;
  case 3:
   fg='/';
   if(num2==0)
   num2=num2+1;
   z=num1/num2;
   break;
  default:
   break;
  }
  show.settext(s2+" "+fg+" "+s1+" = "+z);
  }
  
 });
 bt_add.addactionlistener(new actionlistener(){

  @override
  public void actionperformed(actionevent e) {
  s2=s1;
  s1="";
  f=0;
  show.settext(s2+"+");
  }
  
 });
 bt_sub.addactionlistener(new actionlistener() {

  @override
  public void actionperformed(actionevent e) {
  // todo auto-generated method stub
  s2 = s1;
  s1 = "";
  f = 1;
  show.settext(s2 + " - ");
  }
 });
 bt_mul.addactionlistener(new actionlistener() {

  @override
  public void actionperformed(actionevent e) {
  // todo auto-generated method stub
  s2 = s1;
  s1 = "";
  f = 2;
  show.settext(s2 + " * ");
  }
 });
 bt_div.addactionlistener(new actionlistener() {

  @override
  public void actionperformed(actionevent e) {
  // todo auto-generated method stub
  s2 = s1;
  s1 = "";
  f = 3;
  show.settext(s2 + " / ");
  }
 });
 bt_c.addactionlistener(new actionlistener() {

  @override
  public void actionperformed(actionevent e) {
  // todo auto-generated method stub
  s2 = "";
  s1 = "";
  num1 = 0;
  num2 = 0;
  f = 9;
  show.settext("0");
  }
 });
 }

}

关于计算器的精彩文章请查看《计算器专题》 ，更多精彩等你来发现！

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