Java DBG

Java debugging expirements and example programs.

Hidden Gems

onjcmd:

 java "-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=*:5005,onjcmd=y" src/test/java/OnThrowAndJCmd.java &
 echo $! # get pid
 # wait some time and then start debugging on demand
 jcmd $! VM.start_java_debugging

onthrow (place breakpoint in catch block):

 java "-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=*:5005,launch=echo,onthrow=Ex" src/test/java/OnThrowAndJCmd.java

same with oncaught, but can only be used with jdb and is therefore limited.

License

MIT License