list转set

ListToSet.java

package org.caucoder.mylist;


import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * list转set
 */
public class ListToSet {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<>(Arrays.asList(1,2,3,4));
        System.out.println(list);
        Set<Integer> set = list.stream().collect(Collectors.toSet());
        System.out.println(set);
    }
}
/**
 [1, 2, 3, 4]
 [1, 2, 3, 4]
 */