HOW TO GET THIS OFF?help needed...

Question

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator
public static void main (String [] args)
JFrame frame = new CalculatorFrame ();
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.show ();
class CalculatorFrame extends JFrame
JTextField jtf;
JLabel jlb;
JTextField jtf1;
JLabel jlb1;
JTextField jtf2;
JLabel jlb2;
JButton jbt;
JButton jbt1;
JButton jbt2;
JButton jbt3;
public CalculatorFrame ()
setTitle ("SIMPLE CALCULATOR");
Container contentPane = getContentPane ();
contentPane.setLayout(new FlowLayout());
jlb=new JLabel();
jlb.setText("integer1");
contentPane.add(jlb);
jtf=new JTextField(15);
contentPane.add(jtf);
jlb1=new JLabel();
jlb1.setText("integer2");
contentPane.add(jlb1);
jtf1=new JTextField(15);
contentPane.add(jtf1);
jlb2=new JLabel();
jlb2.setText("result");
contentPane.add(jlb2);
jtf2=new JTextField(15);
contentPane.add(jtf2);
JPanel buttonPanel = new JPanel ();
     addButton (buttonPanel, "add",
new ActionListener ()
public void actionPerformed (ActionEvent evt)
     float a=Float.parseFloat(jtf.getText()), b=Float.parseFloat(jtf1.getText()), temp;
     jtf2.setText("");
temp = a+b;
          jtf2.setText("" + temp);
     addButton (buttonPanel, "subtract",
new ActionListener ()
public void actionPerformed (ActionEvent evt)
     float a=Float.parseFloat(jtf.getText()), b=Float.parseFloat(jtf1.getText()), temp;
     jtf2.setText("");
temp = a-b;
          jtf2.setText("" + temp);
     addButton (buttonPanel, "multiply",
new ActionListener ()
public void actionPerformed (ActionEvent evt)
     float a=Float.parseFloat(jtf.getText()), b=Float.parseFloat(jtf1.getText()), temp;
     jtf2.setText("");
temp = a*b;
          jtf2.setText("" + temp);
     addButton (buttonPanel, "divide",
new ActionListener ()
public void actionPerformed (ActionEvent evt)
     float a=Float.parseFloat(jtf.getText()), b=Float.parseFloat(jtf1.getText()), temp;
     jtf2.setText("");
temp = a/b;
          jtf2.setText("" + temp);
addButton (buttonPanel, "Close",
new ActionListener ()
public void actionPerformed (ActionEvent evt)
System.exit (0);
contentPane.add (buttonPanel, BorderLayout.SOUTH);
public void addButton (Container c, String title,
ActionListener listener)
JButton button = new JButton (title);
c.add (button);
button.addActionListener (listener);
when i compile the above program using the below statement
C:\Program Files\Java\jdk1.5.0_14\bin>javac Calculator.java
Note: Calculator.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
but if i run the program i get the output....
for creating a jar file: i followed the following procedure
1.first,i created a mainClass.txt file containing the info
Main-Class: Calculator
2.i used the statement
C:\Program Files\Java\jdk1.5.0_14\bin>jar cmf mainClass.txt Calculator.jar *.class
to create a jar file
3.i had created a Calculator.jar file now..now when i try to execute the jar file by using
C:\Program Files\Java\jdk1.5.0_14\bin>java -jar Calculator.jar
i get the following error
+Exception in thread "main" java.lang.NoClassDefFoundError: Cal
culator+
what should i do to execute my Calculator.jar file?

Answer 1

First, open the jar with something like WinZip and verify the Manifest.mf has the correct info.
Also, verify that the file/dir structure is correct.
Make sure that the mainClass.txt has a carriage return following the "Main-Class: Calculator"
Have just tried this here with JDK6 and it compiles and works as it should.
KC