以下实例演示了如何使用 contains () 方法来查找数组中的指定元素:

import java.util.ArrayList;
 
public class Main {
    public static void main(String[] args)  {
        ArrayList<String> objArray = new ArrayList<String>();
        ArrayList<String> objArray2 = new ArrayList<String>();
        objArray2.add(0,"common1");
        objArray2.add(1,"common2");
        objArray2.add(2,"notcommon");
        objArray2.add(3,"notcommon1");
        objArray.add(0,"common1");
        objArray.add(1,"common2");
        System.out.println("objArray 的数组元素:"+objArray);
        System.out.println("objArray2 的数组元素:"+objArray2);
        System.out.println("objArray 是否包含字符串common2? : "
        +objArray.contains("common2"));
        System.out.println("objArray2 是否包含数组 objArray? :"
        +objArray2.contains(objArray) );
    }
}

    以上代码运行输出结果为:


objArray 的数组元素:[common1, common2]
objArray2 的数组元素:[common1, common2, notcommon, notcommon1]
objArray 是否包含字符串common2? : true
objArray2 是否包含数组 objArray? :false