获取类型类名String.class.getName()-优快云博客

本文详细介绍了 Java 中 Class 类的 getName() 方法的功能与使用方式。该方法返回 Class 对象所表示的实体（类、接口、数组类、基本类型或 void）的名字。文章通过实例展示了如何获取不同类型（如字符串类、基本类型、数组类）的名称，并提供了 JMX 反射调用时的实际应用场景。

public String getName()

Returns the name of the entity (class, interface, array class, primitive type, or void) represented by thisClass object, as a String.

If this class object represents a reference type that is not an array type then the binary name of the class is returned, as specified byThe Java™ Language Specification.

If this class object represents a primitive type or void, then the name returned is aString equal to the Java language keyword corresponding to the primitive type or void.

If this class object represents a class of arrays, then the internal form of the name consists of the name of the element type preceded by one or more '[' characters representing the depth of the array nesting. The encoding of element type names is as follows:

Element Type	Encoding
boolean	Z
byte	B
char	C
class or interface	Lclassname;
double	D
float	F
int	I
long	J
short	S

The class or interface name classname is the binary name of the class specified above.

Examples:

String.class.getName()
     returns "java.lang.String"
 byte.class.getName()
     returns "byte"
 (new Object[3]).getClass().getName()
     returns "[Ljava.lang.Object;"
 (new int[3][4][5][6][7][8][9]).getClass().getName()
     returns "[[[[[[[I"

Returns:

the name of the class or interface represented by this object.

应用：

public interface MyTestMBean {
    public void methodinmbean(String arg1, String arg2);
}

JMX反射调用时，指定参数类型

server.invoke(on, "methodinmbean", new Object[]{arg1, args2}, new String[]{String.class.getName(), String.class.getName()});

参照：

http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#getName%28%29