问题
its been 2 hours for googling what could be the problem of my exported jar file from eclipse.
My first to third export dont have problem and my jar file runs. But in several exports, the generated jar file is not working already. Help. please.
I have jre and jdk installed. my environment variables are ok.
来源：https://stackoverflow.com/questions/29082094/runnable-jar-file-not-working-first-to-third-exports-is-working-but-several-expo