First program in Java

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Java

Linux

Ubuntu

i have Netbeans 7 over ubuntu 12.04
i tried to write my first java application and this is my code

package first_pro;
import java.io.*;

/**
 *
 * @author amir
 */
public class First_pro
{

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException
    {
        byte [] name=new byte[100];
        String thename="";
       System.out.println("Enter your name:");
       System.in.read(name);
       for(int i=0;i<100;i++)
       {
           if(name[i]==10)
           {
               break;
           }
           else
           {
               thename+=(char)name[i];
           }
           
       }
       if(thename.equals("amir"))
       {
           System.out.print("the enter name is right it is "+thename+"\n");
           
       }
       else
       {
           System.out.print("the enter name is wrong it is "+thename+"\n");
       }
    }
}

i created the jar file

when i tried to double click on it(i made it to run by default using open jdk java runtime 6)

nothing happened

when i tried open jdk 7 also nothing happen

i run the jdk using terminal and it run good

how can i run my jar file using openjdk by double click it ?