How to instrument java methods?

Question

I want to write a simple java agent which can print the name of a method called by the java program instrumented.

For example, my java program I want to instrument

Answer 1

In the method you could add

public class TestInstr {

public static void sayHello() {
System.out.println("method sayHello has been called");
System.out.println("Hello !");
}

public static void main(String args[]) {
sayHello();
sayHello();
sayHello();
}
}

You could use this to get the current method

public String getCurrentMethodName() {
 StackTraceElement stackTraceElements[] =
         (new Throwable()).getStackTrace();
 return stackTraceElements[1].toString();
}

I'm not sure if this is what you're looking for.