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  1. #1
    nishant.4545 is offline Member
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    Default jar file problem

    hello everyone,
    the source code for my program is
    import java.util.*;
    class Sort
    {
    public static void main(String q[])
    {
    long start=System.currentTimeMillis();
    int a[]=new int[100000];
    Random r=new Random();
    for(int i=0;i<a.length;i++)
    a[i]=r.nextInt();
    for(int i=0; i<a.length-1;i++)
    {
    for(int j=i+1;j<=a.length-1;j++)
    {
    if(a[i]>a[j])
    {
    int t=a[j];
    a[j]=a[i];
    a[i]=t;}
    }}

    long end=System.currentTimeMillis();
    System.out.println("time:"+(end-start));

    }}

    then i have a created jar file of this program using following commands int the command prompt:
    echo Main-Class: Sort >manifest.txt
    jar cvfm Sort.jar manifest.txt Sort.class

    This creates the jar file. But when I try to run it by double clicking i get the error 'could not find main class. the program will exit'

    Also when i try to run it in command prompt I get an exception that it could not find the main class.

    What should I do?

  2. #2
    angryboy's Avatar
    angryboy is offline Senior Member
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    Default

    the manifest file need a newline after it. Otherwise jar will strip off that line.

    also try this:
    Java Code:
    jar -efc Sort Sort.jar *.class
    
    //  jar -efc {Main-Class} {Jar-Name} {.class-files}
    Last edited by angryboy; 07-03-2009 at 10:00 PM.
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