execute a jar from ProcessBuilder gives ClassNotFoundException

Question

When I try to execute a jar from command line it works fine. I am trying to execute that same jar in another java program like so:

ProcessBuilder pb = new ProcessBuilder("java", "-Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools.jar");
pb.start()

However, this is giving me a ClassNotFoundException

ERR>Exception in thread "main" java.lang.NoClassDefFoundError:  -Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools/jar"
ERR>Caused by: java.lang.ClassNotFoundException:  -Xmx1024m -Xms1024m -DTOOLS_DIR=".home.IM.work.dist" -Daoi=whole -jar ".home.IM.work.dist.idt_tools.jar"
ERR>    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
ERR>    at java.security.AccessController.doPrivileged(Native Method)
ERR>    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
ERR>    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
ERR>    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
ERR>    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
ERR>Could not find the main class: -Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools.jar".  Program will exit.

Why does it think that is a class? Can you not specify your arguments in one long string?

Answer 1

Makes sense to me.

Perhaps you didn't intend to run a class called "-Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools.jar" perhaps you meant those to be seperate arguments?

try

ProcessBuilder pb = new ProcessBuilder("java", "-Xmx1024m", "-Xms1024m",
    "-DTOOLS_DIR=/home/IM/work/dist", "-Daoi=whole", 
    "-jar", "/home/IM/work/dist/idt_tools.jar");