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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.io.PrintStream;
  7.  
  8. public class Main {
  9.     public static void main(String args[]) {
  10.         System.setOut(new PrintStream(System.out) {
  11.  
  12.             private StackTraceElement getCallSite() {
  13.                 for (StackTraceElement e : Thread.currentThread()
  14.                         .getStackTrace())
  15.                     if (!e.getMethodName().equals("getStackTrace")
  16.                             && !e.getClassName().equals(getClass().getName()))
  17.                         return e;
  18.                 return null;
  19.             }
  20.  
  21.             @Override
  22.             public void println(String s) {
  23.                 println((Object) s);
  24.             }
  25.  
  26.             @Override
  27.             public void println(Object o) {
  28.                 StackTraceElement e = getCallSite();
  29.                 String callSite = e == null ? "??" : e.getFileName() + ":"
  30.                         + e.getLineNumber();
  31.                 super.println(o + "\t\t[" + callSite + "]");
  32.             }
  33.         });
  34.  
  35.         System.out.println("Hello world");
  36.         printStuff();
  37.     }
  38.  
  39.     public static void printStuff() {
  40.         System.out.println("More output!");
  41.     }
  42. }
  43.  
Success #stdin #stdout 0.09s 320320KB
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stdin
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Standard input is empty
stdout
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Hello world		[Main.java:35]
More output!		[Main.java:40]
https://ideone.com/rKG9YJ
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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