获取类型类名String.class.getName()

最新推荐文章于 2025-05-18 21:56:07 发布

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最新推荐文章于 2025-05-18 21:56:07 发布

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分类专栏： Java 测试文章标签： Java 测试 jmx Testing class

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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。

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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