Java TreeMap tutorial and example


The map is sorted according to the natural ordering of its keys, or by a Comparator provided at map creation time, depending on which constructor is used.


Example

package com.candidjava.core;
import java.util.TreeMap;


public class TreeMapExample {

	
	public static void main(String[] args) {
		
		TreeMap<String,String> tm=new TreeMap<String,String>();
		tm.put("name","candid");
		tm.put("email","candid@gmail.com");
		tm.put("password", "123456");
		tm.put("street", "shanthi nagar");
		tm.put("password", "789");
		tm.put("altemail", null);
		tm.put("altph", null);
		
		
		System.out.println("TreeMap ..  "+tm);
		System.out.println("size ... "+tm.size());		
		
	}
	
}
Output:
TreeMap ..  {altemail=null, altph=null, email=candid@gmail.com, name=candid, password=789, street=shanthi nagar}
size ... 6

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