You are confusing an exception or error being thrown as a JVM crash.
A JVM crash occurs due to an internal error in the JVM, you cannot trigger this by writing a normal Java program (or should not unless you find a bug)
What you are doing is triggering an Error which means the program continues to run until all the non daemon threads exit.
The simplest tool to examine the heap is VisualVM which comes with the JDK. If you want to trigger a heap dump on an OutOfMemoryError you can use -XX:+HeapDumpOnOutOfMemoryError