原文出处:xixicat 序 本文主要讲Java7的新特性,相对于Java6而言,Java7增加了一些重要的特性,比如NIO2,不像Java6那么鸡肋,也算是一个重要的版本. 特性列表 suppress异常(新语法) 捕获多个异常(新语法) try-with-resources(新语法) JSR341-Expression Language Specification(新规范) JSR203-More New I/O APIs for the Java Platform(新规范) JSR292与…
Java7语法新特性: 1. switch中增加对String类型的支持. public String generate(String name, String gender) { String title = ""; switch (gender) { case "男": title = name + " 先生"; break; case "女": title = name + " 女士"; break;…
在Java7之前,switch只能匹配整数值,和字符:而Java7添加了字符串的匹配特性. 代码如下: package blog; public class Main { public static void show(String str) { switch (str) { case "people": System.out.println("Input string is people"); break; case "school": Sys…
函数式接口 VS 委托 在C中,可以使用函数指针来存储函数的入口,从而使得函数可以像变量一样赋值.传递和存储,使得函数的调用变得十分灵活,是实现函数回调的基础.然而函数指针不存在函数的签名信息,甚至可以指向任何地址,使用上有诸多不安全因素,因此在很多现代语言中不存在函数指针这种类型. 在Java中,包装一个方法的调用,需要创建一个接口类型和相应的实现类型,在实现中调用需要包装的方法,如果需要调用的是实例方法,还需要将实例的引用传递进接口实现的实例中(后面再比较闭包).这种实现方式的好处是不需要引…
java7新特性之Try-with-resources (TWR) This change is easy to explain, but it has proved to have hidden subtleties, which made it much less easy to implement than originally hoped. The basic idea is to allow a resource (for example, a file or something a…
java7新特性之Diamond syntax Java 7 also introduces a change that means less typing for you when dealing with generics. One of the problems with generics is that the definitions and setup of instances can be really verbose. Let's suppose that you have som…
以下来至网址: http://blog.csdn.net/samjustin1/article/details/52268004 Java7 新特性 1.switch中可以使用字符串了 String s = "test"; switch (s) { case "test" : System.out.println("test"); case "test1" : System.out.println("test1&qu…
