calculatorframe.java

实用的java习题,初学者可用

package calculator;

import java.awt.*;
import javax.swing.*;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class CalculatorFrame
    extends JFrame {
  JPanel contentPane;
  JTextField txtresult = new JTextField();
  JButton btn7 = new JButton();
  JButton btn8 = new JButton();
  JButton btn9 = new JButton();
  JButton btndivide = new JButton();
  JButton btn4 = new JButton();
  JButton btn5 = new JButton();
  JButton btn6 = new JButton();
  JButton btnmultiply = new JButton();
  JButton btn1 = new JButton();
  JButton btn2 = new JButton();
  JButton btn3 = new JButton();
  JButton btnminus = new JButton();
  JButton btn0 = new JButton();
  JButton btnclear = new JButton();
  JButton btnequal = new JButton();
  JButton btnplus = new JButton();
  //声明
  boolean flag = false;
  String operand1;
  String operand2;
  double result;
  String action;

  public CalculatorFrame() {
    try {
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      jbInit();
    }
    catch (Exception exception) {
      exception.printStackTrace();
    }
  }

  /**
   * Component initialization.
   *
   * @throws java.lang.Exception
   */
  private void jbInit() throws Exception {
    contentPane = (JPanel) getContentPane();
    contentPane.setLayout(null);
    setSize(new Dimension(400, 300));
    setTitle("Frame Title");
    txtresult.setEditable(false);
    txtresult.setBounds(new Rectangle(38, 25, 301, 24));
    btn7.setBounds(new Rectangle(38, 71, 63, 36));
    btn7.setText("7");
    btn7.addActionListener(new CalculatorFrame_btn7_actionAdapter(this));
    btn8.setBounds(new Rectangle(118, 71, 63, 36));
    btn8.setText("8");
    btn8.addActionListener(new CalculatorFrame_btn8_actionAdapter(this));
    btn9.setBounds(new Rectangle(197, 71, 63, 36));
    btn9.setText("9");
    btn9.addActionListener(new CalculatorFrame_btn9_actionAdapter(this));
    btndivide.setBounds(new Rectangle(276, 71, 63, 36));
    btndivide.setText("/");
    btndivide.addActionListener(new CalculatorFrame_btndivide_actionAdapter(this));
    btn4.setBounds(new Rectangle(38, 119, 63, 36));
    btn4.setText("4");
    btn4.addActionListener(new CalculatorFrame_btn4_actionAdapter(this));
    btn5.setBounds(new Rectangle(118, 119, 63, 36));
    btn5.setText("5");
    btn5.addActionListener(new CalculatorFrame_btn5_actionAdapter(this));
    btn6.setBounds(new Rectangle(197, 119, 63, 36));
    btn6.setText("6");
    btn6.addActionListener(new CalculatorFrame_btn6_actionAdapter(this));
    btnmultiply.setBounds(new Rectangle(276, 119, 63, 36));
    btnmultiply.setText("*");
    btnmultiply.addActionListener(new CalculatorFrame_btnmultiply_actionAdapter(this));
    btn1.setBounds(new Rectangle(38, 166, 63, 36));
    btn1.setText("1");
    btn1.addActionListener(new CalculatorFrame_btn1_actionAdapter(this));
    btn2.setBounds(new Rectangle(118, 166, 63, 36));
    btn2.setText("2");
    btn2.addActionListener(new CalculatorFrame_btn2_actionAdapter(this));
    btn3.setBounds(new Rectangle(197, 166, 63, 36));
    btn3.setText("3");
    btn3.addActionListener(new CalculatorFrame_btn3_actionAdapter(this));
    btnminus.setBounds(new Rectangle(276, 166, 63, 36));
    btnminus.setText("-");
    btnminus.addActionListener(new CalculatorFrame_btnminus_actionAdapter(this));
    btn0.setBounds(new Rectangle(38, 216, 63, 36));
    btn0.setText("0");
    btn0.addActionListener(new CalculatorFrame_btn0_actionAdapter(this));
    btnclear.setBounds(new Rectangle(118, 216, 63, 36));
    btnclear.setText("C");
    btnclear.addActionListener(new CalculatorFrame_btnclear_actionAdapter(this));
    btnequal.setBounds(new Rectangle(197, 216, 63, 36));
    btnequal.setText("=");
    btnequal.addActionListener(new CalculatorFrame_btnequal_actionAdapter(this));
    btnplus.setBounds(new Rectangle(276, 216, 63, 36));
    btnplus.setText("+");
    btnplus.addActionListener(new CalculatorFrame_btnplus_actionAdapter(this));
    contentPane.add(txtresult);
    contentPane.add(btn7);
    contentPane.add(btn8);
    contentPane.add(btn9);
    contentPane.add(btndivide);
    contentPane.add(btn4);
    contentPane.add(btn5);
    contentPane.add(btn6);
    contentPane.add(btnmultiply);
    contentPane.add(btn1);
    contentPane.add(btn2);
    contentPane.add(btn3);
    contentPane.add(btnminus);
    contentPane.add(btnclear);
    contentPane.add(btnequal);
    contentPane.add(btnplus);
    contentPane.add(btn0);
  }

  public void btn1_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn1.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn1.getActionCommand());
    }
  }

  public void btn2_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn2.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn2.getActionCommand());
    }
  }

  public void btn3_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn3.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn3.getActionCommand());
    }
  }

  public void btn4_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn4.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn4.getActionCommand());
    }
  }

  public void btn5_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn5.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn5.getActionCommand());
    }
  }

  public void btn6_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn6.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn6.getActionCommand());
    }
  }

  public void btn7_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn7.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn7.getActionCommand());
    }
  }

  public void btn8_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn8.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn8.getActionCommand());
    }
  }

  public void btn9_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn9.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn9.getActionCommand());
    }
  }

  public void btn0_actionPerformed(ActionEvent e) {
    if (flag) {
      txtresult.setText(btn0.getActionCommand());
      flag = false;
    }
    else {
      txtresult.setText(txtresult.getText() + btn0.getActionCommand());
    }
  }

  public void btnplus_actionPerformed(ActionEvent e) {
    operand1 = txtresult.getText();
    action = "plus";
    flag = true;
  }

  public void btndivide_actionPerformed(ActionEvent e) {
    action = "divide";
    operand1 = txtresult.getText();
    txtresult.setText("");
    flag = true;
  }

  public void btnclear_actionPerformed(ActionEvent e) {
    txtresult.setText("");
  }

  public void btnminus_actionPerformed(ActionEvent e) {
    action = "minus";
    operand1 = txtresult.getText();
    txtresult.setText("");
    flag = true;
  }

  public void btnmultiply_actionPerformed(ActionEvent e) {
    action = "multiply";
    operand1 = txtresult.getText();
    flag = true;
  }

  public void btnequal_actionPerformed(ActionEvent e) {
    double digit1;
    double digit2;
    operand2 = txtresult.getText();
    if (flag == false) {
      if (action.equals("divide")) {
        digit1 = Double.parseDouble(operand1);
        digit2 = Double.parseDouble(operand2);
        result = digit1 / digit2;
        txtresult.setText(new Double(result).toString());
        // txtresult.setText(""+result);
        flag = true;
      }
      else if (action.equals("plus")) {
        digit1 = Double.parseDouble(operand1);
        digit2 = Double.parseDouble(operand2);
        result = digit1 + digit2;
        txtresult.setText("" + (int) result);
        flag = true;
      }
      else if (action.equals("multiply")) {
        digit1 = Double.parseDouble(operand1);
        digit2 = Double.parseDouble(operand2);
        result = digit1 * digit2;
        txtresult.setText("" + (int) result);
        flag = true;
      }
      else if (action.equals("minus")) {
        digit1 = Double.parseDouble(operand1);
        digit2 = Double.parseDouble(operand2);
        result = digit1 - digit2;
        txtresult.setText("" + (int) result);
        flag = true;
      }
    }
  }
}

class CalculatorFrame_btnequal_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btnequal_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btnequal_actionPerformed(e);
  }
}

class CalculatorFrame_btnmultiply_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btnmultiply_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btnmultiply_actionPerformed(e);
  }
}

class CalculatorFrame_btnminus_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btnminus_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btnminus_actionPerformed(e);
  }
}

class CalculatorFrame_btnclear_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btnclear_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btnclear_actionPerformed(e);
  }
}

class CalculatorFrame_btndivide_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btndivide_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btndivide_actionPerformed(e);
  }
}

class CalculatorFrame_btnplus_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btnplus_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btnplus_actionPerformed(e);
  }
}

class CalculatorFrame_btn0_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn0_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn0_actionPerformed(e);
  }
}

class CalculatorFrame_btn9_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn9_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn9_actionPerformed(e);
  }
}

class CalculatorFrame_btn8_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn8_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn8_actionPerformed(e);
  }
}

class CalculatorFrame_btn7_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn7_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn7_actionPerformed(e);
  }
}

class CalculatorFrame_btn6_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn6_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn6_actionPerformed(e);
  }
}

class CalculatorFrame_btn5_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn5_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn5_actionPerformed(e);
  }
}

class CalculatorFrame_btn4_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn4_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn4_actionPerformed(e);
  }
}

class CalculatorFrame_btn3_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn3_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn3_actionPerformed(e);
  }
}

class CalculatorFrame_btn2_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn2_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn2_actionPerformed(e);
  }
}

class CalculatorFrame_btn1_actionAdapter
    implements ActionListener {
  private CalculatorFrame adaptee;
  CalculatorFrame_btn1_actionAdapter(CalculatorFrame adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.btn1_actionPerformed(e);
  }
}