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“WindowListener”`;窗口右上方的X无助于关闭窗口

2016-07-22 110 views
0

我正在尝试编写我的计算器，尚未完成。然而，我尝试了很多次，才在WindowListener中获得windowClosing事件，但它看起来根本不起作用，而且我已经和几个朋友讨论过了，但我们还没有弄明白。请善意帮助我们解决这个问题。下面是我的代码。第一个是设置框架。“WindowListener”`;窗口右上方的X无助于关闭窗口

package Calculator; 

import java.awt.Frame; 
import java.awt.Button; 
import java.awt.Color; 
import java.awt.Font; 
import java.awt.TextArea; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import java.awt.Panel; 
import java.awt.GridLayout; 





public class CalculatorFrame extends Frame { 

static GridLayout grid= new GridLayout(3,3); 
static Panel panel1= new Panel(); 
static Font newfont=new Font("",Font.BOLD,32); 
static Font newfont1=new Font("",Font.BOLD+Font.ITALIC,20); 
static Font newfont2=new Font("",Font.BOLD+Font.ITALIC,38); 
static TextArea txtarea=new TextArea("",20,15,TextArea.SCROLLBARS_VERTICAL_ONLY); 

static Button B[]=new Button[9]; 
static Button zero=new Button(); 
static Button posnneg=new Button(); 
static Button equal=new Button(); 
static Button dot=new Button(); 
static Button divide=new Button(); 
static Button plus=new Button(); 
static Button minus=new Button(); 
static Button multi=new Button(); 
static Button clear=new Button(); 
static Button square=new Button(); 
static Button squareroot=new Button(); 

          //virtuals 
static int operand; //for switch case 1=+ 2=- 3=* 4=/ 
static boolean firstnumber=true; 
static int continuecalculating; 
static Frame myframe=new Frame(); 
static double tempNumber[]=new double[2]; 
static TextArea txtarea2=new TextArea("",20,15,TextArea.SCROLLBARS_VERTICAL_ONLY); 
static boolean equalclicked=false; 
static boolean operandclicked=false; 
static boolean pnclicked=false; 


public CalculatorFrame(String name){ 

    myframe.setLayout(null); 
    myframe.setBounds(100, 100, 700, 700); 
    myframe.setVisible(true); 
    myframe.setBackground(Color.BLACK); 
    myframe.setTitle(name); 

    panel1.setBounds(50, 300, 240, 240); 
    panel1.setLayout(grid); 
    panel1.setBackground(Color.GRAY); 
    zero.setLabel("0"); 
    zero.setBounds(50, 540, 120, 80); 
    zero.setFont(newfont); 
    posnneg.setLabel("±"); 
    posnneg.setBounds(230,540,60,80); 
    posnneg.setFont(newfont); 
    dot.setLabel("."); 
    dot.setFont(newfont); 
    dot.setBounds(170, 540, 60, 80); 
    equal.setLabel("="); 
    equal.setBounds(50,620,180,50); 
    equal.setFont(newfont); 
    squareroot.setBounds(230,620,60,50); 
    squareroot.setLabel("√"); 
    squareroot.setFont(newfont); 
    plus.setLabel("+"); 
    plus.setBounds(290, 300, 60, 60); 
    plus.setFont(newfont); 
    minus.setLabel("-"); 
    minus.setBounds(290, 360, 60, 60); 
    minus.setFont(newfont); 
    multi.setLabel("×"); 
    multi.setBounds(290, 420, 60, 60); 
    multi.setFont(newfont); 
    divide.setLabel("÷"); 
    divide.setBounds(290, 480, 60, 60); 
    divide.setFont(newfont); 
    square.setLabel("X²"); 
    square.setBounds(290, 540, 60, 60); 
    square.setFont(newfont1); 
    clear.setLabel("Clear"); 
    clear.setBounds(290, 600, 60, 70); 
    clear.setFont(newfont1); 
    txtarea.setBounds(50, 50, 300, 180); 
    txtarea.setEditable(true); 
    txtarea.setFont(newfont2); 
    txtarea.setEditable(false); 


    txtarea2.setVisible(true);    
    txtarea2.setBounds(50, 230, 300, 60); 
    txtarea2.setFont(newfont1); 
    txtarea2.setEditable(false); 

    for(int i=0;i<9;i++) 
    { 
     B[i]=new Button(i+1+""); 
     B[i].setFont(newfont); 
    } 
    panel1.add(B[6]); 
    panel1.add(B[7]); 
    panel1.add(B[8]); 
    panel1.add(B[3]); 
    panel1.add(B[4]); 
    panel1.add(B[5]); 
    panel1.add(B[0]); 
    panel1.add(B[1]); 
    panel1.add(B[2]); 

    myframe.add(panel1); 
    myframe.add(zero); 
    myframe.add(dot); 
    myframe.add(equal); 
    myframe.add(plus); 
    myframe.add(minus); 
    myframe.add(multi); 
    myframe.add(divide); 
    myframe.add(square); 
    myframe.add(clear); 
    myframe.add(txtarea); 
    myframe.add(txtarea2); 
    myframe.add(squareroot); 
    myframe.add(posnneg); 

} 


static class MyActLis implements ActionListener{ 

public void actionPerformed(ActionEvent e) { 
    Button btn=(Button) e.getSource(); 
    if(btn==B[0]) 
    { 
    if(equalclicked) 
    {} 
    else{ 
    txtarea.append("1"); txtarea2.append("1"); 
    } 
    } 
    else if(btn==B[1]) 
    { 
    if(equalclicked) 
    {} 
    else{ 
    txtarea.append("2"); txtarea2.append("2");} 
    } 
    else if(btn==B[2]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("3");txtarea2.append("3");} 
    } 
    else if(btn==B[3]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("4");txtarea2.append("4");} 
    } 
    else if(btn==B[4]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("5");txtarea2.append("5");} 
    } 
    else if(btn==B[5]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("6");txtarea2.append("6");} 
    } 
    else if(btn==B[6]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("7");txtarea2.append("7");} 
    } 
    else if(btn==B[7]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("8");txtarea2.append("8");} 
    } 
    else if(btn==B[8]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("9");txtarea2.append("9");} 
    } 
    else if(btn==zero) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("0");txtarea2.append("0");}    
    } 
    else if(btn==dot) 
    { 
    if(equalclicked){}else{ 
    txtarea.append(".");txtarea2.append(".");}  
    } 
    else if(btn==posnneg) 
    { 
      if(pnclicked) 
      { 
       //+ 
       pnclicked=false; 

      }else 
      { 
       //- 
       pnclicked=true; 

      } 
    } 

    else if(btn==squareroot) 
    { 
     if(equalclicked) 
     { 
     tempNumber[0]= Math.sqrt(tempNumber[0]);    //good 
     txtarea.append("√= "+Double.toString(tempNumber[0])); 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     }else 
     { 
     if(operandclicked){} 
     else 
     { 
     tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
     tempNumber[0]= Math.sqrt(tempNumber[0]);    //good 
     txtarea.append("√= "+Double.toString(tempNumber[0])); 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     } 
     } 
    } 
    else if(btn==square) 
    { 
     if(equalclicked) 
     { 
     tempNumber[0]=tempNumber[0]*tempNumber[0]; 
     txtarea.append("²= "+Double.toString(tempNumber[0])); //good but how to continuously making calculation 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     } 
     else{ 
     if(operandclicked){} 
     else 
     { 
     tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
     tempNumber[0]=tempNumber[0]*tempNumber[0]; 
     txtarea.append("²= "+Double.toString(tempNumber[0])); //good but how to continuously making calculation 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     } 
     } 
    } 

    else if(btn==plus) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("+"); 
    operand=1;  //set operand for execution 
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 
    } 
     else 
     { 
     switch(operand) 
     { 
     case 1: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 
      break; 

     case 2: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 

      break; 
     case 3: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 
      break; 

     case 4: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 
      break; 
     } 
     } 

    } 
    else if(btn==minus) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("-"); 
    operand=2;  
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 
    } 
     else 
     { 
      switch(operand) 
      { 
      case 1: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 

      case 2: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 
      case 3: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 

      case 4: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 
      } 
     } 
    } 


    else if(btn==multi) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("×"); 
    operand=3;  
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 

    }else 
    { 
     switch(operand) 
     { 
     case 1: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 

     case 2: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 
     case 3: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 

     case 4: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 
     } 
    } 
    } 
    else if(btn==divide) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("÷");//÷ 
    operand=4; 
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 
    }else 
    { 
     switch(operand) 
     { 
     case 1: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 

     case 2: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 
     case 3: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 

     case 4: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 
     } 
    } 
    } 

    else if(btn==equal) 
    { 
    if(equalclicked){} 
    else{ 
    tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("="); 
    switch(operand) 
     { 
    case 1: 
     tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 

    case 2: 
     tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 

    case 3: 
     tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 

    case 4: 
     tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 
     } 
    equalclicked=true; 
    operandclicked=false; 
    } 
    } 
    else if(btn==clear) 
    { equalclicked=false; 
     firstnumber=true; 
     operandclicked=false; 
     txtarea.setText(" "); 
     txtarea.setText(""); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     tempNumber[0]=0.0; 
     tempNumber[1]=0.0; 
     tempNumber[2]=0.0; 
    } 

} 

    //try to use textEvent in the action event or try use switch case and the +-*/are the operands 

} 
}

这里是“主”文件，其中包含的WindowListener

package Calculator; 


import java.awt.event.WindowAdapter; 
import java.awt.event.WindowEvent; 

import Calculator.CalculatorFrame.MyActLis; 


public class CalculatorMain { 

    static CalculatorFrame cal=new CalculatorFrame("Yu-Ming's Multi-function Calculator Challenge"); 
    static MyActLis buttonLis=new MyActLis(); 
    static MyWindowLis winlis=new MyWindowLis(); 


    public static void main(String[] args) { 
     //Create Frame and windows 
     //register buttons,and text field, keyevent etc 


     for(int i=0;i<9;i++) 
     { 
     cal.B[i].addActionListener(buttonLis); 
     } 
     cal.dot.addActionListener(buttonLis); 
     cal.zero.addActionListener(buttonLis); 
     cal.plus.addActionListener(buttonLis); 
     cal.minus.addActionListener(buttonLis); 
     cal.multi.addActionListener(buttonLis); 
     cal.divide.addActionListener(buttonLis); 
     cal.equal.addActionListener(buttonLis); 
     cal.squareroot.addActionListener(buttonLis); 
     cal.square.addActionListener(buttonLis); 
     cal.clear.addActionListener(buttonLis); 
     cal.posnneg.addActionListener(buttonLis); 
     cal.addWindowListener(winlis); 


    } 
    static class MyWindowLis extends WindowAdapter 
    { 
     public void windowClosing(WindowEvent e) 
     { 
     cal.dispose(); 
     System.exit(0); 
     } 


    } 

}

来源

2016-07-22 Yu-Ming Chang

+0

欢迎来到StackOverflow！我建议你看看如何为你的问题创建一个[Minimal，Complete，and Verifiable example]（http://stackoverflow.com/help/mcve）。 –

回答

0

那么有基于Oracle文档本身来写你的WindowListener实现一个简单的方法。自从你自己取得了一些进展之后，我已经花时间为你实施了。为了更深入地了解我为什么使用了我的方法，请转至https://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html。 在您的CalculatorFrame类中，我已经进行了更正。

import java.awt.Frame; 
import java.awt.GridLayout; 
import java.awt.Button; 
import java.awt.Color; 
import java.awt.Font; 
import java.awt.TextArea; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.WindowEvent; 
import java.awt.event.WindowListener; 
import java.awt.Panel; 





public class CalculatorFrame extends Frame implements WindowListener { 

static GridLayout grid= new GridLayout(3,3); 
static Panel panel1= new Panel(); 
static Font newfont=new Font("",Font.BOLD,32); 
static Font newfont1=new Font("",Font.BOLD+Font.ITALIC,20); 
static Font newfont2=new Font("",Font.BOLD+Font.ITALIC,38); 
static TextArea txtarea=new TextArea("",20,15,TextArea.SCROLLBARS_VERTICAL_ONLY); 

static Button B[]=new Button[9]; 
static Button zero=new Button(); 
static Button posnneg=new Button(); 
static Button equal=new Button(); 
static Button dot=new Button(); 
static Button divide=new Button(); 
static Button plus=new Button(); 
static Button minus=new Button(); 
static Button multi=new Button(); 
static Button clear=new Button(); 
static Button square=new Button(); 
static Button squareroot=new Button(); 

          //virtuals 
static int operand; //for switch case 1=+ 2=- 3=* 4=/ 
static boolean firstnumber=true; 
static int continuecalculating; 
static Frame myframe=new Frame(); 
static double tempNumber[]=new double[2]; 
static TextArea txtarea2=new TextArea("",20,15,TextArea.SCROLLBARS_VERTICAL_ONLY); 
static boolean equalclicked=false; 
static boolean operandclicked=false; 
static boolean pnclicked=false; 


public CalculatorFrame(String name){ 

    myframe.setLayout(null); 
    myframe.setBounds(100, 100, 700, 700); 
    myframe.setVisible(true); 
    myframe.setBackground(Color.BLACK); 
    myframe.setTitle(name); 

    panel1.setBounds(50, 300, 240, 240); 
    panel1.setLayout(grid); 
    panel1.setBackground(Color.GRAY); 
    zero.setLabel("0"); 
    zero.setBounds(50, 540, 120, 80); 
    zero.setFont(newfont); 
    posnneg.setLabel("±"); 
    posnneg.setBounds(230,540,60,80); 
    posnneg.setFont(newfont); 
    dot.setLabel("."); 
    dot.setFont(newfont); 
    dot.setBounds(170, 540, 60, 80); 
    equal.setLabel("="); 
    equal.setBounds(50,620,180,50); 
    equal.setFont(newfont); 
    squareroot.setBounds(230,620,60,50); 
    squareroot.setLabel("√"); 
    squareroot.setFont(newfont); 
    plus.setLabel("+"); 
    plus.setBounds(290, 300, 60, 60); 
    plus.setFont(newfont); 
    minus.setLabel("-"); 
    minus.setBounds(290, 360, 60, 60); 
    minus.setFont(newfont); 
    multi.setLabel("×"); 
    multi.setBounds(290, 420, 60, 60); 
    multi.setFont(newfont); 
    divide.setLabel("÷"); 
    divide.setBounds(290, 480, 60, 60); 
    divide.setFont(newfont); 
    square.setLabel("X²"); 
    square.setBounds(290, 540, 60, 60); 
    square.setFont(newfont1); 
    clear.setLabel("Clear"); 
    clear.setBounds(290, 600, 60, 70); 
    clear.setFont(newfont1); 
    txtarea.setBounds(50, 50, 300, 180); 
    txtarea.setEditable(true); 
    txtarea.setFont(newfont2); 
    txtarea.setEditable(false); 


    txtarea2.setVisible(true); 
    txtarea2.setBounds(50, 230, 300, 60); 
    txtarea2.setFont(newfont1); 
    txtarea2.setEditable(false); 

    for(int i=0;i<9;i++) 
    { 
     B[i]=new Button(i+1+""); 
     B[i].setFont(newfont); 
    } 
    panel1.add(B[6]); 
    panel1.add(B[7]); 
    panel1.add(B[8]); 
    panel1.add(B[3]); 
    panel1.add(B[4]); 
    panel1.add(B[5]); 
    panel1.add(B[0]); 
    panel1.add(B[1]); 
    panel1.add(B[2]); 

    myframe.add(panel1); 
    myframe.add(zero); 
    myframe.add(dot); 
    myframe.add(equal); 
    myframe.add(plus); 
    myframe.add(minus); 
    myframe.add(multi); 
    myframe.add(divide); 
    myframe.add(square); 
    myframe.add(clear); 
    myframe.add(txtarea); 
    myframe.add(txtarea2); 
    myframe.add(squareroot); 
    myframe.add(posnneg); 
    myframe.addWindowListener(this); 

} 

//public void addListenerForClose(WindowListener windowListener) { 
    //addWindowListener(this); 
//} 


static class MyActLis implements ActionListener{ 

public void actionPerformed(ActionEvent e) { 
    Button btn=(Button) e.getSource(); 
    if(btn==B[0]) 
    { 
    if(equalclicked) 
    {} 
    else{ 
    txtarea.append("1"); txtarea2.append("1"); 
    } 
    } 
    else if(btn==B[1]) 
    { 
    if(equalclicked) 
    {} 
    else{ 
    txtarea.append("2"); txtarea2.append("2");} 
    } 
    else if(btn==B[2]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("3");txtarea2.append("3");} 
    } 
    else if(btn==B[3]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("4");txtarea2.append("4");} 
    } 
    else if(btn==B[4]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("5");txtarea2.append("5");} 
    } 
    else if(btn==B[5]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("6");txtarea2.append("6");} 
    } 
    else if(btn==B[6]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("7");txtarea2.append("7");} 
    } 
    else if(btn==B[7]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("8");txtarea2.append("8");} 
    } 
    else if(btn==B[8]) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("9");txtarea2.append("9");} 
    } 
    else if(btn==zero) 
    { 
    if(equalclicked){}else{ 
    txtarea.append("0");txtarea2.append("0");} 
    } 
    else if(btn==dot) 
    { 
    if(equalclicked){}else{ 
    txtarea.append(".");txtarea2.append(".");} 
    } 
    else if(btn==posnneg) 
    { 
      if(pnclicked) 
      { 
       //+ 
       pnclicked=false; 

      }else 
      { 
       //- 
       pnclicked=true; 

      } 
    } 

    else if(btn==squareroot) 
    { 
     if(equalclicked) 
     { 
     tempNumber[0]= Math.sqrt(tempNumber[0]);    //good 
     txtarea.append("√= "+Double.toString(tempNumber[0])); 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     }else 
     { 
     if(operandclicked){} 
     else 
     { 
     tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
     tempNumber[0]= Math.sqrt(tempNumber[0]);    //good 
     txtarea.append("√= "+Double.toString(tempNumber[0])); 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     } 
     } 
    } 
    else if(btn==square) 
    { 
     if(equalclicked) 
     { 
     tempNumber[0]=tempNumber[0]*tempNumber[0]; 
     txtarea.append("²= "+Double.toString(tempNumber[0])); //good but how to continuously making calculation 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     } 
     else{ 
     if(operandclicked){} 
     else 
     { 
     tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
     tempNumber[0]=tempNumber[0]*tempNumber[0]; 
     txtarea.append("²= "+Double.toString(tempNumber[0])); //good but how to continuously making calculation 
     txtarea2.setText(Double.toString(tempNumber[0])); 
     } 
     } 
    } 

    else if(btn==plus) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("+"); 
    operand=1;  //set operand for execution 
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 
    } 
     else 
     { 
     switch(operand) 
     { 
     case 1: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      //tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 
      break; 

     case 2: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      //tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 

      break; 
     case 3: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      //tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 
      break; 

     case 4: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("+"); 
      //tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=1; 
      break; 
     } 
     } 

    } 
    else if(btn==minus) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("-"); 
    operand=2; 
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 
    } 
     else 
     { 
      switch(operand) 
      { 
      case 1: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       //tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 

      case 2: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       //tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 
      case 3: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       //tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 

      case 4: 
       tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
       txtarea.append("-"); 
       //tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
       txtarea2.setText(" "); 
       txtarea2.setText(""); 
       operand=2; 
       break; 
      } 
     } 
    } 


    else if(btn==multi) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("×"); 
    operand=3; 
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 

    }else 
    { 
     switch(operand) 
     { 
     case 1: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      //tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 

     case 2: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      //tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 
     case 3: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      //tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 

     case 4: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("×"); 
      //tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=3; 
      break; 
     } 
    } 
    } 
    else if(btn==divide) 
    { 
    operandclicked=true; 
    if(equalclicked){firstnumber=true; equalclicked=false;} 
    if(firstnumber) 
    { 
    tempNumber[0]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("÷");//÷ 
    operand=4; 
    txtarea2.setText(" "); 
    txtarea2.setText(""); 
    firstnumber=false; 
    }else 
    { 
     switch(operand) 
     { 
     case 1: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      //tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 

     case 2: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      //tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 
     case 3: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      //tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 

     case 4: 
      tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
      txtarea.append("÷"); 
      //tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
      txtarea2.setText(" "); 
      txtarea2.setText(""); 
      operand=4; 
      break; 
     } 
    } 
    } 

    else if(btn==equal) 
    { 
    if(equalclicked){} 
    else{ 
    tempNumber[1]= Double.parseDouble(txtarea2.getText()); 
    txtarea.append("="); 
    switch(operand) 
     { 
    case 1: 
     //tempNumber[0]=CalculatorMethods.addition(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 

    case 2: 
     //tempNumber[0]=CalculatorMethods.substraction(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 

    case 3: 
     //tempNumber[0]=CalculatorMethods.multiply(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 

    case 4: 
     //tempNumber[0]=CalculatorMethods.division(tempNumber[0], tempNumber[1]); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     txtarea.append(Double.toString(tempNumber[0])); 
     txtarea2.append(Double.toString(tempNumber[0])); 
     break; 
     } 
    equalclicked=true; 
    operandclicked=false; 
    } 
    } 
    else if(btn==clear) 
    { equalclicked=false; 
     firstnumber=true; 
     operandclicked=false; 
     txtarea.setText(" "); 
     txtarea.setText(""); 
     txtarea2.setText(" "); 
     txtarea2.setText(""); 
     tempNumber[0]=0.0; 
     tempNumber[1]=0.0; 
     tempNumber[2]=0.0; 
    } 

} 

    //try to use textEvent in the action event or try use switch case and the +-*/are the operands 

} 


@Override 
public void windowActivated(WindowEvent e) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void windowClosed(WindowEvent e) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void windowClosing(WindowEvent e) { 
    dispose(); 
    System.exit(0); 

} 

@Override 
public void windowDeactivated(WindowEvent e) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void windowDeiconified(WindowEvent e) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void windowIconified(WindowEvent e) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void windowOpened(WindowEvent e) { 
    // TODO Auto-generated method stub 

}

您可能需要删除CalculatorMain类中的WindowListener实现。也知道我已经评论了一些代码来编译代码。

来源

2016-07-22 19:38:30 funaquarius24

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