Syntax error Get Sub Map from TreeMap in Java

Get Sub Map from TreeMap in Java

To get Sub Map in Java, use the submap() method. It returns the elements in a range from the Map.

First, create a TreeMap and add elements −

TreeMap<Integer,String> m = new TreeMap<Integer,String>();
m.put(1,"PHP");
m.put(2,"jQuery");
m.put(3,"JavaScript");
m.put(4,"Ruby");
m.put(5,"Java");
m.put(6,"AngularJS");
m.put(7,"ExpressJS");

Now, get the Sub Map between 4 and 6 −

m.subMap(4, 6)

The following is an example to get Sub Map from Tree Map in Java

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]){
      TreeMap<Integer,String> m = new TreeMap<Integer,String>();
      m.put(1,"PHP");
      m.put(2,"jQuery");
      m.put(3,"JavaScript");
      m.put(4,"Ruby");
      m.put(5,"Java");
      m.put(6,"AngularJS");
      m.put(7,"ExpressJS");
      System.out.println("TreeMap Elements...\n"+m);
      System.out.println("Sub Map = " + m.subMap(4, 6));
   }
}

Output

TreeMap Elements...
{1=PHP, 2=jQuery, 3=JavaScript, 4=Ruby, 5=Java, 6=AngularJS, 7=ExpressJS}
Sub Map = {4=Ruby, 5=Java}
Updated on: 2019-07-30T22:30:24+05:30

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