概述
在jdk 1.8里，可以使用如下代码获取list元素对象中某个属性的列表。
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package test;import java.util.arraylist;import java.util.list;import java.util.stream.collectors;public class listattrtest { public static void main(string[] args) { list<coupon> couponlist = new arraylist<>(); coupon coupon1 = new coupon(1,100,"优惠券1"); coupon coupon2 = new coupon(2,200,"优惠券2"); coupon coupon3 = new coupon(3,300,"优惠券3"); couponlist.add(coupon1); couponlist.add(coupon2); couponlist.add(coupon3); list<integer> resultlist = couponlist.stream().map(coupon::getcouponid).collect(collectors.tolist()); system.out.println(resultlist); }} |
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public class coupon { private integer couponid; private integer price; private string name; public coupon(integer couponid, integer price, string name) { this.couponid = couponid; this.price = price; this.name = name; } public integer getcouponid() { return couponid; } public void setcouponid(integer couponid) { this.couponid = couponid; } public integer getprice() { return price; } public void setprice(integer price) { this.price = price; } public string getname() { return name; } public void setname(string name) { this.name = name; }} |
打印结果如下：
[1, 2, 3]
总结
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原文链接：https://blog.csdn.net/linsongbin1/article/details/83933184
