exceptionshowframe.java

介绍有关java的资料 课件 相当一本书籍 里面都是很基础的知识

package exceptionshow;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import mypackage.*;

/**
 * Title:        Java抛出异常演示程序
 * Description:  Java抛出异常演示程序，用于北京师范大学计算机系Java课程教学示范。
 * Copyright:    Copyright (c) 2001
 * Company:      北京师范大学计算机系
 * @author 孙一林
 * @version 1.0
 */

public class ExceptionShowFrame extends JFrame {
  JPanel contentPane;
  JTextField jTextField1 = new JTextField();
  JTextField jTextField2 = new JTextField();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JButton jButton4 = new JButton();
  JLabel jLabel1 = new JLabel();
  JTextField jTextField3 = new JTextField();
  JLabel jLabel2 = new JLabel();
  JLabel jLabel3 = new JLabel();

  /**Construct the frame*/
  public ExceptionShowFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception  {
    jTextField1.setText("0");
    jTextField1.setBounds(new Rectangle(5, 71, 94, 32));
    //setIconImage(Toolkit.getDefaultToolkit().createImage(ExceptionShowFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(null);
    this.setSize(new Dimension(325, 202));
    this.setTitle("Java抛出异常演示程序");
    jTextField2.setText("0");
    jTextField2.setBounds(new Rectangle(222, 70, 89, 30));
    jButton1.setText("+");
    jButton1.setBounds(new Rectangle(108, 12, 50, 52));
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jButton2.setText("-");
    jButton2.setBounds(new Rectangle(161, 12, 49, 51));
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    jButton3.setText("*");
    jButton3.setBounds(new Rectangle(108, 67, 50, 50));
    jButton3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton3_actionPerformed(e);
      }
    });
    jButton4.setText("/");
    jButton4.setBounds(new Rectangle(160, 66, 49, 51));
    jButton4.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton4_actionPerformed(e);
      }
    });
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 25));
    jLabel1.setText("=");
    jLabel1.setBounds(new Rectangle(22, 133, 30, 20));
    jTextField3.setText("0");
    jTextField3.setBounds(new Rectangle(83, 132, 228, 32));
    jLabel2.setText("第一个数：");
    jLabel2.setBounds(new Rectangle(7, 21, 90, 32));
    jLabel3.setText("第二个数：");
    jLabel3.setBounds(new Rectangle(228, 22, 83, 31));
    contentPane.add(jTextField1, null);
    contentPane.add(jTextField2, null);
    contentPane.add(jButton3, null);
    contentPane.add(jButton1, null);
    contentPane.add(jButton2, null);
    contentPane.add(jButton4, null);
    contentPane.add(jLabel2, null);
    contentPane.add(jLabel3, null);
    contentPane.add(jTextField3, null);
    contentPane.add(jLabel1, null);
  }
  /**Overridden so we can exit when window is closed*/
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    CalculationClass myCalculate = new CalculationClass();
    if(myCalculate.Calculate(Integer.parseInt(jTextField1.getText()),Integer.parseInt(jTextField2.getText()),'+'))
      jTextField3.setText(Integer.toString(myCalculate.z));
    else
      jTextField3.setText("计算错误");
  }

  void jButton2_actionPerformed(ActionEvent e) {
    CalculationClass myCalculate = new CalculationClass();
    if(myCalculate.Calculate(Integer.parseInt(jTextField1.getText()),Integer.parseInt(jTextField2.getText()),'-'))
      jTextField3.setText(Integer.toString(myCalculate.z));
    else
      jTextField3.setText("计算错误");
  }

  void jButton3_actionPerformed(ActionEvent e) {
    CalculationClass myCalculate = new CalculationClass();
    if(myCalculate.Calculate(Integer.parseInt(jTextField1.getText()),Integer.parseInt(jTextField2.getText()),'*'))
      jTextField3.setText(Integer.toString(myCalculate.z));
    else
      jTextField3.setText("计算错误");
  }

  void jButton4_actionPerformed(ActionEvent e) {
    CalculationClass myCalculate = new CalculationClass();
    if(myCalculate.Calculate(Integer.parseInt(jTextField1.getText()),Integer.parseInt(jTextField2.getText()),'/'))
      jTextField3.setText(Integer.toString(myCalculate.z));
    else
      jTextField3.setText("计算错误");
  }
}