What will be the output upon executing main method<br /> <br /> public class Graph {<br />    private static Multimap<Integer,Integer> adjacentDirectedNodesMap = ArrayListMultimap.create();<br />    <br />    Graph(){<br />       adjacentDirectedNodesMap.put(1, 2);<br />       adjacentDirectedNodesMap.put(1, 3);<br />       adjacentDirectedNodesMap.put(1, 4);<br />       adjacentDirectedNodesMap.put(3, 5);<br />       adjacentDirectedNodesMap.put(4, 5);<br />    }<br />    <br />    public static void main(String[] args){<br />       ArrayList visited = new ArrayList();<br />       <br />       Integer startNode = 1;<br />       <br />       for(Integer adjacentNodes: adjacentDirectedNodesMap.get(startNode)){<br />             System.out.println(adjacentNodes);<br />       }<br />    }   <br /> }
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 Q1. What will be the output upon executing main method

public class Graph {
   private static Multimap<Integer,Integer> adjacentDirectedNodesMap = ArrayListMultimap.create();
   
   Graph(){
      adjacentDirectedNodesMap.put(1, 2);
      adjacentDirectedNodesMap.put(1, 3);
      adjacentDirectedNodesMap.put(1, 4);
      adjacentDirectedNodesMap.put(3, 5);
      adjacentDirectedNodesMap.put(4, 5);
   }
   
   public static void main(String[] args){
      ArrayList visited = new ArrayList();
      
      Integer startNode = 1;
      
      for(Integer adjacentNodes: adjacentDirectedNodesMap.get(startNode)){
            System.out.println(adjacentNodes);
      }
   }   
}
Core Java2017-07-23 09:50:30

Ans. Nothing as we haven't yet created an instance and hence adjacentDirectedNodesMap won't be initialized with any value and hence is empty.

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