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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.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12. try{
  13. List<Object> obList=new ArrayList<Object>();
  14.  
  15. String a=null;
  16. Integer b=2;
  17. Character c='9';
  18.  
  19. obList.add(a);
  20. obList.add(b);
  21. obList.add(c);
  22.  
  23. System.out.println("List is "+obList);
  24.  
  25. if(obList.contains(null)){
  26. System.out.println("contains null");
  27. }else{
  28. System.out.println("does not contains null");
  29. }
  30. }catch(Exception e){
  31. System.out.println(e);
  32. }
  33. }
  34. }
Success #stdin #stdout 0.1s 320320KB
stdin
Standard input is empty
stdout
List is [null, 2, 9]
contains null