frmtest.java~17~

本程序用JAVA编制

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

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class frmTest extends JFrame {
 JTextArea theArea=null;
  public frmTest() {

    super("菜单练习");
    theArea=new JTextArea();
    theArea.setEditable(true) ;
    this.getContentPane() .add(new JScrollPane(theArea)) ;
    JMenuBar mbar=new JMenuBar();
    mbar.setOpaque(true) ;
    JMenu thefile=new JMenu("file");
    JMenuItem newf=new JMenuItem("new",new ImageIcon("./images/javaIcon.gif"));
    thefile.add(newf) ;
    mbar.add(thefile) ;
    setJMenuBar(mbar);
    double s=Math.exp(2);
    System.out.println(Math.pow(2.7182818284590455,2));
    System.out.println(s);
  }

  public static void main(String[] args){

    JFrame f=new frmTest();
    //f.setSize(400,400) ;
    f.addWindowListener(new WindowAdapter() {
          public void windowClosing(WindowEvent e){
          System.exit(0);
          }
        });
        f.setVisible(true) ;
  }

}