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Question

What is the output of below snippet? 
public class Demo
{
  public static void main(String[] args)
  {
  Map<Integer, Object> sampleMap = new TreeMap<Integer, Object>();
  sampleMap.put(1, null); 
  sampleMap.put(5, null); 
  sampleMap.put(3, null); 
  sampleMap.put(2, null); 
  sampleMap.put(4, null); 
 
       System.out.println(sampleMap);
   }
}

a.

{1=null, 2=null, 3=null, 4=null, 5=null}

b.

{5=null}

c.

Exception is thrown

d.

{1=null, 5=null, 3=null, 2=null, 4=null}

Posted under java util Java Programming

Answer: (a).{1=null, 2=null, 3=null, 4=null, 5=null}

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