Suppose I have a method like this
Calculator calc;
public void testMethod(){
-----
----
Calc.add(1,2);
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-------
}
Now I want print Calculator.add at the end of the function, i.e i want to print the classname.printname at the end of the function. The printing should be generic enough that I can use the same for other methods as well. How to achieve this goal.
Thanks in advance
private static final int CLIENT_CODE_STACK_INDEX;
static {
// Finds out the index of "this code" in the returned stack trace - funny but it differs in JDK 1.5 and 1.6
int i = 0;
for (StackTraceElement ste : Thread.currentThread().getStackTrace()) {
i++;
if (ste.getClassName().equals(Resource.class.getName())) {
break;
}
}
CLIENT_CODE_STACK_INDEX = i;
}
public static String getCurrentMethodName() {
return Thread.currentThread().getStackTrace()[CLIENT_CODE_STACK_INDEX].getMethodName();
}
public static String getCallerMethodName() {
return Thread.currentThread().getStackTrace()[CLIENT_CODE_STACK_INDEX+1].getMethodName();
}
As the very simplest approach, remember you can always call this.getClass().getName():
class SimpleCalculator {
public int add(int a, int b) {
System.out.println(this.getClass().getName() +
" - adding " + a + " and " + b);
return a + b;
}
}
Another common approach is to use a logging library like Log4J.
The class you'd be using is Logger
You configure Log4J to write to a certain file.
Each class declares a Logger object that prints messages to a file.
Each message begins with the name of the class that generated the message.
class SimpleCalculator {
Logger calcLogger = Logger.getLogger(SimpleCalculator.class);
public int add(int a, int b) {
calcLogger.debug("add - adding " + a + " and " + b);
return a + b;
}
}
... or you could use a method like @urir suggests.
... or you could get crazy and use AOP.
user Calculator.getClass().getName());for finding name of class and Calculator.getMethod();
or use System.out.println( "I was called by " + e.getStackTrace()[1].getClassName() + "." + e.getStackTrace()[1].getMethodName() + "()!" );
Check below lines by changing index value:
System.out.println("Name of Caller method:"
+ new Throwable().getStackTrace()[1].getMethodName());
System.out.println("Name of Current method:"
+ new Throwable().getStackTrace()[0].getMethodName());
