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EnumMap Set View Contained on the map using EntrySet() method

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This Program is used  EnumMap Set View  Contained on the map using  EntrySet() method

Example Program


package com.example;
import java.util.EnumMap;

public class EnumMapContainsKey { // create an enum
	public enum Numbers {
		ONE, TWO, THREE, FOUR, FIVE
	};

	public static void main(String[] args) {
		EnumMap<Numbers, String> map = new EnumMap<Numbers, String>(
				Numbers.class);
		// associate values in map
		map.put(Numbers.ONE, "1");
		map.put(Numbers.TWO, "2");
		map.put(Numbers.THREE, "3");
		map.put(Numbers.FOUR, "4");
		// print the whole map
		System.out.println(map); // check if map contains a mapping at specified
									// key
		boolean contains = map.containsKey(Numbers.ONE); // print the result
		System.out.println("Numbers.ONE has a mapping:" + contains);
		// check if map contains a mapping at another specified key
		contains = map.containsKey(Numbers.FIVE); // print the result
		System.out.println("Numbers.FIVE has a mapping:" + contains);
	}
}


 

Output:

Map: {ONE=1, TWO=2, THREE=3, FOUR=4}
Set: [ONE=1, TWO=2, THREE=3, FOUR=4]

Description

The java.util.EnumMap.entrySet() method returns a Set view of the mappings contained in this map.

Declaration

Following is the declaration for java.util.EnumMap.entrySet() method

public Set<Map.Entry<K,V>> entrySet()

Parameters

  • NA

Return Value

This method returns a set view of the mappings contained in this enum map.

Exception

  • NA

 

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Filed in: Java Examples

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