@test
public void test01()
排序前:[3, 2, 1, 4]
排序後:[1, 2, 3, 4]
@test
public void test02()
system.out.println("*************************===");
collections.sort(list);
for (user user : list)
system.out.println("*************************===");
collections.sort(list, new comparator()
});for (user user : list)
}}
user [id=1, name=aaa, age=19]
user [id=4, name=c, age=12]
user [id=2, name=bbbb, age=17]
user [id=3, name=dd, age=22]
*************************===
user [id=4, name=c, age=12]
user [id=2, name=bbbb, age=17]
user [id=1, name=aaa, age=19]
user [id=3, name=dd, age=22]
*************************===
user [id=1, name=aaa, age=19]
user [id=2, name=bbbb, age=17]
user [id=4, name=c, age=12]
user [id=3, name=dd, age=22]
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