随笔分类 - java
摘要:1.基本数据类型与包装类 2.接口 接口定义: 只包含全局常量和抽象方法 全局常量:public static final int MAX=2; 抽象方法:abstract
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摘要:alt+shift+↑ 移动代码 ctrl+f 寻找字符 ctrl+d 删除一行 alt+shift+r 批量改名
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摘要:修饰变量时: 变成常量,不可变,只能初始化一次。 修饰方法时: 该方法不能被重写。 修饰类时: 该类不能被继承。 static: 修饰变量时:静态变量,或类变量。从属于类的变量。
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摘要:A compiled representation of a regular expression. A regular expression, specified as a string, must first be compiled into an instance of this class.
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摘要:[ ] 匹配一个范围的字符 example:[0-9] + 匹配一个或多个
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摘要:A simple text scanner which can parse primitive types and strings using regular expressions. A Scanner breaks its input into tokens using a delimiter
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摘要:The Vector class implements a growable array of objects. Like an array, it contains components that can be accessed using an integer index. However, t
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摘要:Defines a factory API that enables applications to configure and obtain a SAX based parser to parse XML documents. 定义一个工厂api以使应用去配置和获得一个SAX基于解析器去解析XML
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