I am trying to figure out a way of going around the problem of a long classpath in windows. Although I am in Linux (that is why the examples bellow are on a unix format), the end users may be in linux and I know the problem happens.
My application download and create a string of the jars and files it needs to run. It than generates a string such as:
java -classpath path_to_file1:path_to_file2:path_to_file3 jvm_args MainClass
And runs the application. This works fine in Linux but it explodes in windows because the classpath is too long.
The problem I understood and I have tried the solution proposed on: How to set a long Java classpath in Windows?
However I had no success since the path to the MainClass is not found (it is on the classpath!). Here is what I did:
I have the following folder structure:
[root]
├── classes
│ └── com
│ └── tst
│ ├── CPTest1.class
│ ├── CPTest2.class
│ └── CPTest3.class
└── com
└── tst
├── CPTest1.java
├── CPTest2.java
└── CPTest3.java
the classes were compiled by calling:
javac -d classes -cp . com/tst/*
And here are the files:
CPTest1.java
package com.tst;
public class CPTest1{
public static void main(String[] args) {
System.out.println ("Run CPTest1.main()");
}
}
CPTest2.java
package com.tst;
public class CPTest2 {
public static void main(String[] args) {
System.out.println ("Run CPTest2.main()");
CPTest1 cpt1 = new CPTest1();
}
}
CPTest3.java
package com.tst;
public class CPTest3 {
public static void main(String[] args) {
System.out.println ("Run CPTest3.main()");
CPTest1 cpt1 = new CPTest1();
CPTest2 cpt2 = new CPTest2();
}
}
Now if I am on [root] and run:
java -cp classes com.tst.CPTest3
I see the correct output. However if I first generate the "pathing jar" as the solution I pointed out suggests, by creating a file: cpTest.txt (I've tried this with relative and full path)
Class-Path: classes
and create the jar using:
jar -cvfm cp.jar cpTest.txt
than finally trying to run:
java -cp cp.jar com.tst.CPTest3
all I get is an error of not finding the CPTest3 class:
Error: Could not find or load main class com.tst.CPTest3
What am I missing? Thanks for any help!
