java.util.Collections.disjoint() Method

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Description

The disjoint(Collection<?>, Collection<?>) method is used to 'true' if the two specified collections have no elements in common.

Declaration

Following is the declaration for java.util.Collections.disjoint() method.

public static boolean disjoint(Collection<?> c1,Collection<?> c2)

Parameters

• c1 − This is a collection.

• c2 − This is another collection.

Return Value

NA

Exception

NullPointerException − This is thrown if either collection is null.

Example

The following example shows the usage of java.util.Collections.disjoint()

package com.tutorialspoint;

import java.util.*;

public class CollectionsDemo {
   public static void main(String args[]) {

      // create two lists    
      List<String> srclst = new ArrayList<String>(5);
      List<String> destlst = new ArrayList<String>(10);

      // populate two lists
      srclst.add("Java");
      srclst.add("is");
      srclst.add("best");

      destlst.add("C++");
      destlst.add("is not");
      destlst.add("older");      

      // check elements in both collections
      boolean iscommon = Collections.disjoint(srclst, destlst);

      System.out.println("No commom elements: "+iscommon);    
   }    
}

Let us compile and run the above program, this will produce the following result.

No commom elements: true