java中如何数组转set_如何将数组转换为Set

在本节中，我们将向展示如何将字符串数组转换为Set。可以通过以下方法使用实现：

For-each循环

Arrays.asList()方法(array⇒list⇒set)

Collections.addAll()方法

文件：ArrayToSetExample.java -

package com.yiibai.tutorial;

import java.util.Arrays;

import java.util.Collections;

import java.util.HashSet;

import java.util.Set;

/**

* @author yiibai

*

*/

public class ArrayToSetExample {

public static void main(String[] args) {

/* Array to be converted */

String[] numbers=new String[]{"One""Two""Three""One""Six"};

/* Method - 1 */

Set numberList1=new HashSet<>();

for (String integer : numbers) {

numberList1.add(integer);

}

System.out.println("Number List1="+numberList1);

/* Method - 2 */

Set numberList2=new HashSet<>(Arrays.asList(numbers));

System.out.println("Number List2="+numberList2);

/* Method - 3 */

Set numberList3=new HashSet<>();

Collections.addAll(numberList3 numbers);

System.out.println("Number List3="+numberList3);

}

}

执行得到以下结果 -

Number List1=[Six One Two Three]

Number List2=[Six One Two Three]

Number List3=[Six One Two Three]