How to add Value in Array Sorted

How to add Value in Array Sorted

  March 29, 2017    

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For this we use Treemap ,it may contain many null values but one nullKey.

import java.util.*;
class treemap
{
public static void main(String args[])
{
TreeMap<Integer,Integer> treemaps=new TreeMap<Integer,Integer>(); //Storing two integer values
treemaps.put(5,null);
treemaps.put(1,null);
treemaps.put(90,null);
treemaps.put(17,null);
Set set=treemaps.entrySet(); //Use set to get values in set (For iterator)
Iterator i=set.iterator(); //set Iterator on set
while(i.hasNext())
{
Map.Entry a=(Map.Entry)i.next(); //give key and value to a MapEntry
System.out.println(a.getKey());
}
//or without Iterator
for(Map.Entry<Integer,Integer> getdata :treemaps.entrySet())
{
System.out.println(getdata.getKey());
}
}
}