求数组交集
使用 retainAll () 方法来计算两个数组的交集：
mport java.util.ArrayList;
public class 数组交集 {
public static void main(String[] args) {
ArrayList array1=new ArrayList();
ArrayList array2=new ArrayList();
array1.add(0,"english");
array1.add(1,"chinese");
array1.add(2,"french");
array2.add(0,"english");
array2.add(1,"can't chinese");
array2.add(2,"can't french");
System.out.println("arrary1 数组元素:"+array1);
System.out.println("array2 数组元素:"+array2);
array1.retainAll(array2);
System.out.println("array2 & array1 数组交集为："+array1);
}
}
结果如下：arrary1 数组元素:[english, chinese, french]
array2 数组元素:[english, can't chinese, can't french]
array2 & array1 数组交集为：[english]
Original: https://www.cnblogs.com/fshny/p/16112290.html
Author: future5
Title: java实例–每日一练
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