How can I get the current stack trace in Java?

You can use Thread.currentThread().getStackTrace().

That returns an array of StackTraceElements that represent the current stack trace of a program.

StackTraceElement[] st = Thread.currentThread().getStackTrace();

is fine if you don't care what the first element of the stack is.

StackTraceElement[] st = new Throwable().getStackTrace();

will have a defined position for your current method, if that matters.