Java lang包
java.lang包是java语言的核心，它提供了java中的基础类。包括基本Object类、Class类、String类、基本类型的包装类、基本的数学类等等最基本的类。
Java.lang包
- Java.lang Boolean
- Java.lang Byte
- Java.lang Character
- Java.lang Character.SubSet
- Java.lang Class
- Java.lang ClassLoader
- Java.lang Compiler
- Java.lang Double
- Java.lang Enum
- Java.lang Float
- Java.lang InheritableThreadLocal
- Java.lang Integer
- Java.lang Long
- Java.lang Object
- Java.lang Package
- Java.lang Process
- Java.lang ProcessBuilder
- Java.lang Runtime
- Java.lang RuntimePermission
- Java.lang SecurityManager
- Java.lang Short
- Java.lang StackTraceElement
- Java.lang StrictMath
- Java.lang StringBuffer
- Java.lang StringBuilder
- Java.lang System
- Java.lang ThreadGroup
- Java.lang ThreadLocal
- Java.lang Throwable
- Java.lang Void
- Java.lang Interfaces
- Java.lang Error
- Java.lang Exceptions
