Hi Friend,

Try the following code:

import java.io.*;
import java.util.jar.*;

public class CreateJar {
public static int buffer = 10240;
protected void createJarArchive(File jarFile, File f) {
try {
byte b[] = new byte[buffer];
FileOutputStream fout = new FileOutputStream(jarFile);
JarOutputStream out = new JarOutputStream(fout, new Manifest());

if (f == null || !f.exists()|| f.isDirectory())
System.out.println();
JarEntry addFile = new JarEntry(f.getName());
addFile.setTime(f.lastModified());
out.putNextEntry(addFile);

FileInputStream fin = new FileInputStream(f);
while (true) {
int len = fin.read(b, 0, b.length);
if (len <= 0)
break;
out.write(b, 0, len);
}
fin.close();

out.close();
fout.close(); System.out.println("Jar File is created successfully.");
} catch (Exception ex) {}
}
public static void main(String[]args){
CreateJar jar=new CreateJar();
File f = new File("C:/hello.java");
File file=new File("C:/hello.jar ");
jar.createJarArchive(file, f);
}

}

Thanks