Java Examples - Remove an array from another array

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Problem Description

How to remove one array from another array?

Solution

Following example uses Removeall method to remove one array from another.

import java.util.ArrayList;

public class Main {
   public static void main(String[] args)  {
      ArrayList objArray = new ArrayList();
      ArrayList objArray2 = new ArrayList();
      objArray2.add(0,"common1");
      objArray2.add(1,"common2");
      objArray2.add(2,"notcommon");
      objArray2.add(3,"notcommon1");
      objArray.add(0,"common1");
      objArray.add(1,"common2");
      objArray.add(2,"notcommon2");
      System.out.println("Array elements of array1" +objArray);
      System.out.println("Array elements of array2" +objArray2);
      objArray.removeAll(objArray2);
      System.out.println("Array1 after removing array2 from array1"+objArray);
   }
}

Result

The above code sample will produce the following result.

Array elements of array1[common1, common2, notcommon2]
Array elements of array2[common1, common2, notcommon, notcommon1]
Array1 after removing array2 from array1[notcommon2]