java错题题解

1、Java和C++一样，是纯编译型语言，因此它们的class都是在编译时静态联编(static binding)的

java不完全算是编译型语言，他编译的字节码文件运行时是解释执行的，其次，java和C++的类也不都完全是静态绑定的，比如C+++的虚函数，java的父类引用子类对象等情况

java.lang包中不能被继承的类：

public final class Byte

public final class Character

public static final class Character.UnicodeBlock

public final class Class

public final class Compile

public final class Double

public final class Float

public final class Integer

public final class Long

public final class Math

public final class ProcessBuilder

public final class RuntimePermission

public final class Short

public final class StackTraceElement

public final class StrictMath

public final class String

public final class StringBuffer

public final class StringBuilder

public final class System

public final class Void