“的WindowListener”`;窗口的右上角X无助于关闭我的窗口

Question

我正在尝试编写我的计算器，但还没有完成。但是，我尝试了很多次才能在WindowListener中获取windowClosing事件，但它似乎根本不起作用，我和几个朋友讨论过，但我们还没有想到它。请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。

NAudio.Wave.SampleProviders

这是包含windowListener

的“main”文件

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

}
}

Answer 1

有一种简单的方法可以根据oracle文档本身编写WindowListener实现。我已经花了我的时间为你实现它，因为你自己取得了一些进展。为了更深入地了解我使用该方法的原因，请转到https://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html。 在您的CalculatorFrame类中，我进行了更正。

$.ajax({
    url: "https://en.wikipedia.org/w/api.php?action=opensearch&format=json&search=Robert&limit=6&suggest=1&redirects=return&callback=ttt",
    jsonp: "callback",
    dataType: "jsonp",
    success: function( response ) {
        console.log( response );
    }
});

您可能需要删除CalculatorMain类中的WindowListener实现。还要知道我已经注释了一些行以允许代码编译。