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Tip: Using the Java Collections Disjoint Method

See how to use the disjoint method in Collections to find if the given lists are completely disjointed.


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See how to use the disjoint method in Collections to find if the given lists are completely disjointed:

import java.util.*;

public class UsingDisjointInCollections {
   
   public static void main(String args[])
   {
      UsingDisjointInCollections usingDisjointInCollections = new UsingDisjointInCollections();
      usingDisjointInCollections.proceed();
   }
   
   private void proceed()
   {
      //Creating 2 lists to compare
      List firstLst = new ArrayList(3);
      List secondList = new ArrayList(3);

      //Populating the first list with some elements
      firstLst.add("It");
      firstLst.add("is");
      firstLst.add("raining");

      //Populating the second list with some elements      
      secondList.add("Its cool");
      secondList.add("weather");
      secondList.add("after");
      secondList.add("raining");      

      //Using disjoint, checking both the lists
      boolean areListsDisjoint = Collections.disjoint(firstLst, secondList);

      System.out.println("Given lists are disjoint: "+areListsDisjoint);    
   }    
}

/*

Expected output:

[root@mypc]# java UsingDisjointInCollections
Given lists are disjoint: false

*/ 

 

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Sridhar M S. is a Java developer from Bangalore, India. He holds a master's degree in Computer Science.
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