java使用工厂模式编写计算器（swing界面）

package com.v4;
public class Arithmetic {
public int count(String str){
return 0;
}
}

package com.v4;
public class ArithmeticFactory {
public static Arithmetic getArith(String str){
Arithmetic ari = null;
if(str.indexOf("+") != -1){
ari = new Add();
}else if(str.indexOf("-") != -1){
ari = new Minus();
}else if(str.indexOf("*") != -1){
ari = new Multiply();
}else if(str.indexOf("/") != -1){
ari = new Divide();
}
return ari;
}
}

package com.v4;
public class Add extends Arithmetic{
@Override
public int count(String str) {
String[] strs = str.split("\\+");
return Integer.parseInt(strs[0])+Integer.parseInt(strs[1]);
}
}

package com.v4;
public class Minus extends Arithmetic{
@Override
public int count(String str) {
// TODO Auto-generated method stub
String[] strs = str.split("-");
return Integer.parseInt(strs[0])-Integer.parseInt(strs[1]);
}

package com.v4;
public class Multiply extends Arithmetic{
@Override
public int count(String str) {
// TODO Auto-generated method stub
String[] strs = str.split("\\*");
return Integer.parseInt(strs[0])*Integer.parseInt(strs[1]);
}
}

package com.v4;
public class Divide extends Arithmetic{
@Override
public int count(String str) {
// TODO Auto-generated method stub
String[] strs = str.split("/");
return Integer.parseInt(strs[0])/Integer.parseInt(strs[1]);
}
}

package com.v4;
import java.util.Scanner;package com.v4;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.Color;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.JLabel;
import java.awt.event.FocusAdapter;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class Calculator extends JFrame implements ActionListener {

private JPanel contentPane;
private JTextField textField;
JButton button_1;
JButton button_2;
JButton button_3;
JButton button_4;
JButton button_5;
JButton button_6;
JButton button_7;
JButton button_8;
JButton button_9;
JButton button_0;
JButton button_add;
JButton button_minus;
JButton button_mulptily;
JButton button_divide;
JButton button_clear;
JButton button_equal;

/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public
c8c9
void run() {
try {
Calculator frame = new Calculator();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public Calculator() {
setBackground(Color.WHITE);
setTitle("计算器");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);

JPanel panel = new JPanel();
contentPane.add(panel, BorderLayout.CENTER);
panel.setLayout(null);

textField = new JTextField();
textField.setBounds(12, 12, 412, 36);
textField.setHorizontalAlignment(SwingConstants.RIGHT);
panel.add(textField);
textField.setColumns(10);

button_4 = new JButton("4");
button_4.setBounds(12, 103, 85, 31);
button_4.addActionListener(this);
panel.add(button_4);

button_5 = new JButton("5");
button_5.setBounds(120, 103, 85, 31);
button_5.addActionListener(this);
panel.add(button_5);

button_1 = new JButton("1");
button_1.setBounds(12, 60, 85, 31);
button_1.addActionListener(this);
panel.add(button_1);

button_6 = new JButton("6");
button_6.setBounds(231, 103, 85, 31);
button_6.addActionListener(this);
panel.add(button_6);

button_7 = new JButton("7");
button_7.setBounds(12, 146, 85, 31);
button_7.addActionListener(this);
panel.add(button_7);

button_8 = new JButton("8");
button_8.setBounds(120, 146, 85, 31);
button_8.addActionListener(this);
panel.add(button_8);

button_9 = new JButton("9");
button_9.setBounds(231, 146, 85, 31);
button_9.addActionListener(this);
panel.add(button_9);

button_2 = new JButton("2");
button_2.setBounds(120, 60, 85, 31);
button_2.addActionListener(this);
panel.add(button_2);

button_3 = new JButton("3");
button_3.setBounds(231, 60, 85, 31);
button_3.addActionListener(this);
panel.add(button_3);

button_0 = new JButton("0");
button_0.setBounds(12, 189, 85, 31);
button_0.addActionListener(this);
panel.add(button_0);

button_clear = new JButton("清空");
button_clear.setBounds(120, 189, 85, 31);
button_clear.addActionListener(this);
panel.add(button_clear);

button_add = new JButton("+");
button_add.setBounds(339, 60, 85, 31);
button_add.addActionListener(this);
panel.add(button_add);

button_minus = new JButton("-");
button_minus.setBounds(339, 103, 85, 31);
button_minus.addActionListener(this);
panel.add(button_minus);

button_mulptily = new JButton("*");
button_mulptily.setBounds(339, 146, 85, 31);
button_mulptily.addActionListener(this);
panel.add(button_mulptily);

button_divide = new JButton("/");
button_divide.setBounds(339, 189, 85, 31);
button_divide.addActionListener(this);
panel.add(button_divide);

button_equal = new JButton("=");
button_equal.setBounds(231, 189, 85, 31);
button_equal.addActionListener(this);
panel.add(button_equal);

}

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

if (e.getSource() == button_equal) {
Arithmetic ari = ArithmeticFactory.getArith(textField.getText());
int num = ari.count(textField.getText());
textField.setText("" + num);
} else if (e.getSource() == button_clear) {
textField.setText("");
} else {
textField.setText(textField.getText() + e.getActionCommand());
}
}

}