它与这个值有关；numOverall = (Integer.toString(theModel.getCalculationValue()));
我认为它没有在班级之间正确转移？
计算类
/*
* calc view class
*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Calc extends JFrame implements ActionListener {
private JButton plusButton = new JButton("+");
private JButton minusButton = new JButton("-");
private JButton clearButton = new JButton("Clear");
private JButton equalsButton = new JButton("=");
private JButton zeroButton = new JButton("0");
private JButton oneButton = new JButton("1");
private JButton twoButton = new JButton("2");
private JButton threeButton = new JButton("3");
private JButton fourButton = new JButton("4");
private JButton fiveButton = new JButton("5");
private JButton sixButton = new JButton("6");
private JButton sevenButton = new JButton("7");
private JButton eightButton = new JButton("8");
private JButton nineButton = new JButton("9");
private String number = "";
private JLabel numDisplay = new JLabel("0");
private boolean addition = false;
private boolean subtraction = false;
private String numOverall;
private CalculationModel theModel;
private int total = 0;
private boolean isEquals = false; // false = haven't clicked equals button yet, true they have
//private String numberText;
Calc(){
JPanel calcPanel = new JPanel();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(400, 600);
calcPanel.add(numDisplay);
calcPanel.add(plusButton);
calcPanel.add(minusButton);
calcPanel.add(clearButton);
calcPanel.add(equalsButton);
calcPanel.add(zeroButton);
calcPanel.add(oneButton);
calcPanel.add(twoButton);
calcPanel.add(threeButton);
calcPanel.add(fourButton);
calcPanel.add(fiveButton);
calcPanel.add(sixButton);
calcPanel.add(sevenButton);
calcPanel.add(eightButton);
calcPanel.add(nineButton);
this.add(calcPanel);
plusButton.addActionListener(this);
minusButton.addActionListener(this);
clearButton.addActionListener(this);
equalsButton.addActionListener(this);
zeroButton.addActionListener(this);
oneButton.addActionListener(this);
twoButton.addActionListener(this);
threeButton.addActionListener(this);
fourButton.addActionListener(this);
fiveButton.addActionListener(this);
sixButton.addActionListener(this);
sevenButton.addActionListener(this);
eightButton.addActionListener(this);
nineButton.addActionListener(this);
}
public void actionPerformed(ActionEvent event){
if (event.getSource() instanceof JButton){
JButton clickedButton = (JButton) event.getSource();
String buttonText = clickedButton.getText();
numOverall = (Integer.toString(theModel.getCalculationValue()));
if (clickedButton == zeroButton || clickedButton == oneButton || clickedButton == twoButton || clickedButton == threeButton || clickedButton == fourButton || clickedButton == fiveButton || clickedButton == sixButton || clickedButton == sevenButton || clickedButton == eightButton || clickedButton == nineButton)
{
number = number + buttonText;
numDisplay.setText(number);
}
if (clickedButton == clearButton){
number = "";
addition = false;
subtraction = false;
total = 0;
numDisplay.setText(number);
}
if (clickedButton == plusButton){
addition = true;
subtraction = false;
total = Integer.parseInt(number);
}
if (clickedButton == minusButton){
addition = false;
subtraction = true;
total = Integer.parseInt(number);
//number = "";
}
if (clickedButton == equalsButton){
isEquals = true;
addition = false;
subtraction = false;
numDisplay.setText(numOverall);
}
}
}
public int getNumber(){
return Integer.parseInt(number);
}
public boolean addition(){
return addition;
}
public boolean subtraction(){
return subtraction;
}
public int total(){
return total;
}
public boolean isEquals(){
return isEquals;
}
public String getNumberString(){
return number;
}
}
模型类
public class CalculationModel {
private int calculationValue;
public void addTwoNumbers(int firstNumber, int secondNumber){
calculationValue = firstNumber + secondNumber;
}
public void minusTwoNumbers(int firstNumber, int secondNumber){
calculationValue = firstNumber - secondNumber;
}
public int getCalculationValue(){
return calculationValue;
}
}
mvc 计算类
public class MVCCalc {
public static void main(String[] args) {
Calc theView = new Calc();
CalculationModel theModel = new CalculationModel();
Calculations theController = new Calculations(theView,theModel);
theView.setVisible(true);
}
}
计算类
public class Calculations
{
private Calc theView;
private CalculationModel theModel;
private int number1;
private int total;
public Calculations(Calc theView, CalculationModel theModel)
{
this.theView = theView;
this.theModel = theModel;
}
public void doesometing() {
if(theView.isEquals()){
if(theView.addition()){
number1 = theView.getNumber();
total = theView.total();
theModel.addTwoNumbers(total, number1);
}
if(theView.subtraction())
{
number1 = theView.getNumber();
total = theView.total();
theModel.minusTwoNumbers(total, number1);
}
//theView.addition() = false;
//theView.subtraction() = false;
}
}
}