fork download
  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.io.*;
  4.  
  5. /* Name of the class has to be "Main" only if the class is public. */
  6. class Ideone
  7. {
  8. public static void main (String[] args) throws java.lang.Exception
  9. {
  10. String s;
  11. while (!(s=r.readLine()).startsWith("40")) System.out.println(s);
  12. }
  13. }
Runtime error #stdin #stdout #stderr 0.07s 380160KB
stdin
1
2
10
42
11
stdout
1
2
10
42
11
stderr
Exception in thread "main" java.lang.NullPointerException
	at Ideone.main(Main.java:12)