摘要:
import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; public class Test { public static void main(String[] args) { System.out.println(Human.class.getAnnota... 阅读全文
摘要:
public class Test { public static void main(String[] args) { // 第一种获取枚举值的方法 Season[] seasions = Season.values(); for (Season season : seasions) { System.out.pr... 阅读全文
摘要:
泛型的使用: public class Test { public static void main(String[] args) { DoWork<Person> doWork = new DoWork<>(); doWork.doSth(new Person()); DoEat<Man> doE 阅读全文