Java array difference instance code

The following example demonstrates how to use the removeAll () method to calculate the difference between two arrays:

Main. Java file:

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("array1 的元素" +objArray);
    System.out.println("array2 的元素" +objArray2);
    objArray.removeAll(objArray2);
    System.out.println("array1 与 array2 数组差集为："+objArray);
  }
}

The output of the above code is:

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