Thread.currentThread().getStackTrace()[2]

Less words, basically stack trace being an array, the 2 as commented below will pull who called it. It has to be the same in all, otherwise you will call other parts of the array but you want the 2 who called it.

getStackTrace() Returns an array of stack trace elements, each representing one stack frame. The zeroth element of the array (assuming the array's length is non-zero) represents the top of the stack, which is the last method invocation in the sequence. Typically, this is the point at which this throwable was created and thrown. The last element of the array (assuming the array's length is non-zero) represents the bottom of the stack, which is the first method invocation in the sequence. Means the last element, the zeroth one, is getStackTrace, the first is the method in which getStackTrace has been called and the 2nd, of course the method that called the first ste element. Place that in mthod5 and check the output

for (StackTraceElement ste : Thread.currentThread().getStackTrace())
    System.out.println(ste.getMethodName());