求两个数组的差集

使用removeAll()房啊来计算两个数组的差集

完整代码

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);}
}

结果输出

array1 的元素[common1, common2, notcommon2]
array2 的元素[common1, common2, notcommon, notcommon1]
array1 与 array2 数组差集为：[notcommon2]