如何從 Java 陣列中刪除另一個數組

問題描述

如何從一個數組中刪除另一個數組？

解決方案

以下示例使用 Removeall 方法從一個數組中刪除另一個數組。

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);
   }
}

結果

以上程式碼示例將產生以下結果。

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