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work: 匿名内部类 #136

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work: 匿名内部类 #136

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8 changes: 5 additions & 3 deletions src/main/java/com/github/hcsp/polymorphism/User.java
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Original file line number Diff line number Diff line change
@@ -1,7 +1,9 @@
package com.github.hcsp.polymorphism;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;

public class User {
/** 用户ID，数据库主键，全局唯一 */
Expand All @@ -26,9 +28,9 @@ public String getName() {
// 这里使用了一个NameCollector类，请尝试将它改写成匿名内部类
// 使得代码更加集中，更加容易阅读
public static List<String> collectNames(List<User> users) {
NameCollector collector = new NameCollector();
users.forEach(collector);
return collector.getNames();
List<String> names = new ArrayList<>();
users.forEach(user -> names.add(user.getName()));
return names;
}

public static void main(String[] args) {
Expand Down