怎么提取java代码中的类名、方法名

Description

Below I present you two different ways to get the current Class:

Using Thread

Using getClass()

The simplest way to get the name of the class where your code is being executed in is using the 

getClass()

 method present in every java object. Like here:

String clazz = this.getClass().getName();

This works only if executed in an Object, namely an instanciated class. If you try to execute the code above in a 

static

 method. It won't work. Even the keyword 

this

 is
meaningless in a static method.

Also, the class returned by the above method may actually be a subclass of the class in which the method is defined. This is because subclasses inherit the methods of their parents; and getClass() returns the actual runtime type of the object. To get the actual
class in which a method is defined, use the method below also.

In a 

static

 method you can instead use the following:

String clazz = Thread.currentThread().getStackTrace()[1].getClassName();

Which uses the static method

getStackTrace()

 to get the whole stacktrace. This method returns an array, where the first element (index 0) is the getStackTrace() you called and the second element (index
1) is the method your code is in.

A similar trick can be used to find out the name of the method currently executed:

String method = Thread.currentThread().getStackTrace()[1].getMethodName();

It's exactly the same principle, just you dig out the name of the method instead of the class.

 

The code

package org.wikijava.reflection;  

  public class MethodName {   public static void main(String[] args) { 

 MethodName methodName = new MethodName();   

  String clazz = Thread.currentThread() .getStackTrace()[1].getClassName();

String method = Thread.currentThread() .getStackTrace()[1].getMethodName();

System.out.println("class name: " + clazz + " Method Name " + method); 

  methodName.anotherMethod(); }   

  private void anotherMethod() { 

  String clazz = this.getClass().getName(); 

  String method = Thread.currentThread() .getStackTrace()[1].getMethodName(); 

  System.out.println("class
name: " + clazz + "
Method Name " + method);   }   }

声明：这个是适用于对当前ide中获取得到，之外的thread还在研究。