UsingObjects.java

package com.abhirockzz.wordpress.npesaviors;

import java.util.Map;
import java.util.Objects;

public class UsingObjects {
	
	String getValSafe(Map<String, String> aMap, String key) {
		Map<String, String> safeMap = Objects.requireNonNull(aMap,
				"Map is null");
		String safeKey = Objects.requireNonNull(key, "Key is null");

		return safeMap.containsKey(safeKey) ? safeMap.get(safeKey) : null;
	}

	public static void main(String[] args) {
		UsingObjects obj = new UsingObjects();
		obj.getValSafe(null, "dummy");
	}
}