mancalframe.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 ClassShow;
//Title:        类演示程序
//Version:
//Copyright:    Copyright (c) 1999
//Author:       孙一林
//Company:      北京师范大学计算机系
//Description:  类演示程序   北京师范大学计算机系

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;

public class manCalFrame extends DecoratedFrame {
  XYLayout xYLayout1 = new XYLayout();
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JLabel jLabel2 = new JLabel();
  JTextField jTextField2 = new JTextField();
  JLabel jLabel3 = new JLabel();
  JTextField jTextField3 = new JTextField();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JButton jButton4 = new JButton();
  MenuBar menuBar1 = new MenuBar();
  Menu menuFile = new Menu();
  MenuItem menuFileExit = new MenuItem();
  Menu menuHelp = new Menu();
  MenuItem menuHelpAbout = new MenuItem();

  public manCalFrame() {
    try  {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception {
    jLabel1.setText("计算器：");
    this.setExitOnClose(false);
    this.setSize(new Dimension(400, 300));
    this.setTitle("人计算动作演示程序");
    this.setLayout(xYLayout1);
    jTextField1.setText("第一个数值");
    jLabel2.setText("计算操作");
    jTextField2.setText("第二个数值");
    jLabel3.setText("=");
    jTextField3.setText("计算结果");
    jButton1.setText("加");
    jButton1.addActionListener(new java.awt.event.ActionListener() {

      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jButton2.setText("减");
    jButton2.addActionListener(new java.awt.event.ActionListener() {

      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    jButton3.setText("乘");
    jButton3.addActionListener(new java.awt.event.ActionListener() {

      public void actionPerformed(ActionEvent e) {
        jButton3_actionPerformed(e);
      }
    });
    jButton4.setText("除");
    jButton4.addActionListener(new java.awt.event.ActionListener() {

      public void actionPerformed(ActionEvent e) {
        jButton4_actionPerformed(e);
      }
    });
    menuFile.setLabel("File");
    menuFileExit.setLabel("Exit");
    menuFileExit.addActionListener(new ActionListener()  {

      public void actionPerformed(ActionEvent e) {
        fileExit_actionPerformed(e);
      }
    });
    menuHelp.setLabel("Help");
    menuHelpAbout.setLabel("About");
    menuHelpAbout.addActionListener(new ActionListener()  {

      public void actionPerformed(ActionEvent e) {
        helpAbout_actionPerformed(e);
      }
    });
    this.add(jButton1, new XYConstraints(55, 77, 62, 22));
    this.add(jLabel1, new XYConstraints(9, 41, 51, 21));
    this.add(jTextField1, new XYConstraints(55, 39, 70, 20));
    this.add(jTextField2, new XYConstraints(182, 39, 70, 20));
    this.add(jLabel2, new XYConstraints(132, 39, 55, 22));
    this.add(jLabel3, new XYConstraints(261, 42, 20, 16));
    this.add(jTextField3, new XYConstraints(278, 39, 100, 20));
    this.add(jButton4, new XYConstraints(265, 77, 62, 22));
    this.add(jButton3, new XYConstraints(195, 77, 62, 22));
    this.add(jButton2, new XYConstraints(125, 77, 62, 22));
    menuFile.add(menuFileExit);
    menuHelp.add(menuHelpAbout);
    menuBar1.add(menuFile);
    menuBar1.add(menuHelp);
    this.setMenuBar(menuBar1);
  }

  void jButton4_actionPerformed(ActionEvent e) {
    try{
      Integer value1 = new Integer(jTextField1.getText());
      Integer value2 = new Integer(jTextField2.getText());
      int result = (value1.intValue()/value2.intValue());
      jTextField3.setText(new Integer(result).toString());
    }
    catch(ArithmeticException ae){
      jTextField3.setText("不能除0");
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    Integer value1 = new Integer(jTextField1.getText());
    Integer value2 = new Integer(jTextField2.getText());
    int result = (value1.intValue() + value2.intValue());
    jTextField3.setText(new Integer(result).toString());
  }

  void jButton2_actionPerformed(ActionEvent e) {
    Integer value1 = new Integer(jTextField1.getText());
    Integer value2 = new Integer(jTextField2.getText());
    int result = (value1.intValue() - value2.intValue());
    jTextField3.setText(new Integer(result).toString());
  }

  void jButton3_actionPerformed(ActionEvent e) {
    Integer value1 = new Integer(jTextField1.getText());
    Integer value2 = new Integer(jTextField2.getText());
    int result = (value1.intValue()*value2.intValue());
    jTextField3.setText(new Integer(result).toString());
  }

  //File | Exit action performed
  public void fileExit_actionPerformed(ActionEvent e) {
    this.dispose();
  }
  //Help | About action performed
  public void helpAbout_actionPerformed(ActionEvent e) {
    AboutBox dlg = new AboutBox(this);
    Dimension dlgSize = dlg.getPreferredSize();
    Dimension frmSize = getSize();
    Point loc = getLocation();
    dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x, (frmSize.height - dlgSize.height) / 2 + loc.y);
    dlg.setModal(true);
    dlg.show();
  }
}