@Test
public void test8() {
ArrayList
<User
> users
= new ArrayList<>();
users
.add(new User("Tom", 10));
users
.add(new User("Tom2", 20));
users
.add(new User("Tom3", 30));
users
.add(new User("Tom4", 40));
users
.removeIf(user
-> (user
.getAge() > 18));
System
.out
.println(JSONArray
.toJSONString(users
));
}
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