从对象list中取出特定的属性作为新的list

Entity.java

package org.caucoder.mylist;

public class Entity {
    private String fname;
    private String lname;

    public Entity(String fname, String lname) {
        this.fname = fname;
        this.lname = lname;
    }

    public String getFname() {
        return fname;
    }

    public void setFname(String fname) {
        this.fname = fname;
    }

    public String getLname() {
        return lname;
    }

    public void setLname(String lname) {
        this.lname = lname;
    }
}

GetSpecificField.java

package org.caucoder.mylist;

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

/**
 * 重对象数组中取出特定的属性作为新的list
 */
public class GetSpecificField {
    public static void main(String[] args) {
        List<Entity> enList = new ArrayList<>(Arrays.asList(new Entity("huang","zhuangzhuang"),
                    new Entity("Q10","Viking")));
        List<String> fnameList = enList.stream().map(Entity::getFname).collect(Collectors.toList());
        System.out.println(fnameList);
    }
}
/**
 [huang, Q10]
 */