cac.java

这个是关于java的代码

/**
* Calculator.java
*
* 创建日期：2007-8-29
* 
* @author Tofer
*/
package Calculator;

import java.awt.*;
import java.awt.event.*;
public class Calculator extends Frame implements ActionListener {
private Frame f;
private Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,badd,bjian,bchen,bchu,bdian,bdeng,bcls;
public TextField tf1;
private Panel p1,p2;
public Calculator(){
   f=new Frame("Calculator");
   p1=new Panel();
   p2=new Panel();
  
}
public void lauchCal(){
   f.setSize(400,300);
   p1.setLayout(new FlowLayout());
   p2.setLayout(new GridLayout(4,4,5,5));
   f.setLayout(new BorderLayout());
   tf1=new TextField(30);
   tf1.setText("");
   b0=new Button("0");
   b0.addActionListener(this);
   b1=new Button("1");
   b1.addActionListener(this);
   b2=new Button("2");
   b2.addActionListener(this);
   b3=new Button("3");
   b3.addActionListener(this);
   b4=new Button("4");
   b4.addActionListener(this);
   b5=new Button("5");
   b5.addActionListener(this);
   b6=new Button("6");
   b6.addActionListener(this);
   b7=new Button("7");
   b7.addActionListener(this);
   b8=new Button("8");
   b8.addActionListener(this);
   b9=new Button("9");
   b9.addActionListener(this);
   badd=new Button("+");
   badd.addActionListener(this);
   bjian=new Button("-");
   bjian.addActionListener(this);
   bchen=new Button("*");
   bchen.addActionListener(this);
   bchu=new Button("/");
   bchu.addActionListener(this);
   bdian=new Button(".");
   bdian.addActionListener(this);
   bdeng=new Button("=");
   bdeng.addActionListener(this);
   bcls=new Button("cls");
   bcls.addActionListener(this);
   p1.add(tf1);
   p2.add(b0);
   p2.add(b1);
   p2.add(b2);
   p2.add(b3);
   p2.add(b4);
   p2.add(b5);
   p2.add(b6);
   p2.add(b7);
   p2.add(b8);
   p2.add(b9);
   p2.add(badd);
   p2.add(bjian);
   p2.add(bchen);
   p2.add(bchu);
   p2.add(bdian);
   p2.add(bdeng);
   p1.add(bcls);
   f.add(p1,BorderLayout.NORTH);
   f.add(p2,BorderLayout.SOUTH);
   f.pack();
   f.setVisible(true);
   f.addWindowListener(new WindowAdapter(){ 
    public void windowClosing(WindowEvent e){ 
      System.exit(0);
       }   
     });  
}
public void actionPerformed(ActionEvent e)
{
   String temp,temp1,temp2,temp3;
   Double shu1,shu2=0.0,shu3=0.0;
   int comm;
   System.out.println(e.getActionCommand());
   temp=e.getActionCommand();
   if("cls".equals(temp)){tf1.setText("");}else{
   if("=".equals(temp)){
    temp1=tf1.getText();
    if(temp1.contains("+")){
    comm=temp1.indexOf("+");
    shu1=Double.parseDouble(temp1.substring(0,comm));
    shu2=Double.parseDouble(temp1.substring(comm+1));
    shu3=shu1+shu2;
    temp3=Double.toString(shu3);
    tf1.setText(temp3);
      }else if(temp1.contains("*")){
     comm=temp1.indexOf("*");
     shu1=Double.parseDouble(temp1.substring(0,comm));
     shu2=Double.parseDouble(temp1.substring(comm+1));
     shu3=shu1*shu2;
     temp3=Double.toString(shu3);
     tf1.setText(temp3);
     }else if(temp1.contains("/")){
      comm=temp1.indexOf("/");
      shu1=Double.parseDouble(temp1.substring(0,comm));
      shu2=Double.parseDouble(temp1.substring(comm+1));
      shu3=shu1/shu2;
      temp3=Double.toString(shu3);
      tf1.setText(temp3);
     }else if(temp1.contains("-")){
    comm=temp1.indexOf("-");
    shu1=Double.parseDouble(temp1.substring(0,comm));
    shu2=Double.parseDouble(temp1.substring(comm+1));
    shu3=shu1-shu2;
    temp3=Double.toString(shu3);
    tf1.setText(temp3);
     }else{
    tf1.setText("不能计算，缺少另一个运算数");
   }
   }else{
    temp2=tf1.getText();
    temp2=temp2+temp;
    tf1.setText(temp2);
   }
}
}
public static void main(String[] args){
   Calculator guiwindow=new Calculator();
   guiwindow.lauchCal();
}
}