How to get current function name?

Question

Hello, everyone!
I want to get the current function name for debug purpose. I simply want to dump out current class name, function name (and better line number) of current executing statement. For example, I can embed my debugger inside my source codes if I can get the current function name as the following,
<code>
class foo
void function goo()
//operations
myDebugger (getCurrentFunctionName(), informationString)
</code>
Then my debugger will have richer information which indicates in which function information is dumped. Have I made myself understood? If Java does not have such apporach to get current function name automatically, I have to define a function local variable which contains function name manually in each function I want to debug. And pass the variable to my debugger which seems rather silly.
Can anyone help?
Thanks in advance,
George

Answer 1

To elaborate a little: be sure to read the API on getStackTrace: because of JVM optimization
there may be missing stack trace info, so look before you leap:
public class Client {
    public static void main(String[] args) {
        f();
    static void f() {
        Debugger.log("testing");
class Debugger {
    public static void log(String msg) {
        StackTraceElement[] trace = new Throwable().getStackTrace();
        if (trace.length >= 1) {
            StackTraceElement elt = trace[1];
            System.out.println(elt.getFileName() + ": " + elt.getClassName() + "." +
                elt.getMethodName() + "(line " + elt.getLineNumber() + "): " + msg);
        } else
            System.out.println("[UNKNOWN CALLER]: " + msg);
}