Java TreeMap Example

Chapter: Collections Last Updated: 13-05-2016 19:55:58 UTC

Program:

            /* ............... START ............... */
                
import java.util.TreeMap;
import java.util.Set;
import java.util.Iterator;
import java.util.Map;

public class JavaTreeMapExample {

	public static void main(String args[]) {

		TreeMap<Integer, String> treeMap = new TreeMap<Integer, String>();

		/* Adding elements to TreeMap */
		treeMap.put(1, "Java");
		treeMap.put(22, "C#");
		treeMap.put(38, "Phython");
		treeMap.put(4, "Java");
		treeMap.put(2, "PHP");

		/* Display content using Iterator */
		Set set = treeMap.entrySet();
		Iterator iterator = set.iterator();
		while (iterator.hasNext()) {
			Map.Entry mentry = (Map.Entry) iterator.next();
			System.out.print("key is: " + mentry.getKey() + " & Value is: ");
			System.out.println(mentry.getValue());
		}

	}
}
                /* ............... END ............... */
        

Output

key is: 1 & Value is: Java
key is: 2 & Value is: PHP
key is: 4 & Value is: Java
key is: 22 & Value is: C#
key is: 38 & Value is: Phython

Notes:

  • TreeMap is Red-Black tree based NavigableMap implementation.
  • It is sorted according to the natural ordering of its keys.

Tags

Collection, Java TreeMap Example, Java

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