09 2020 档案

摘要:集合对象里面取出每个对象的某个值 System.out.println(employeeInfoList.stream().map(employeeInfo::getName).collect(Collectors.toList())); 取出多个值。便于简洁返回 List<Map> resultN 阅读全文
posted @ 2020-09-28 14:41 妖君你好 阅读(179) 评论(0) 推荐(0)
摘要:1 一个简单的类 public class Dog { public void sayHi(String name) { System.out.println("汪汪------"+name); }} 2 实现MethodIn... 阅读全文
posted @ 2020-09-18 16:16 妖君你好 阅读(167) 评论(0) 推荐(0)
摘要:1 申明一个接口 public interface JdkProxyDemo{ void sayHi(String name);} 2 实现这个接口 public class JdkProxyDemoImpl implements JdkProx... 阅读全文
posted @ 2020-09-18 14:53 妖君你好 阅读(156) 评论(0) 推荐(0)
摘要:public class ReflectService { public void sayHi(String name){ System.out.println("hello"+ name); } public static v... 阅读全文
posted @ 2020-09-18 14:14 妖君你好 阅读(148) 评论(0) 推荐(0)