How to get the file path of current/target class in JAVA?

Sometimes, we need to get the absolute path of some class, i.e. "D:\TestProject\bin\org\apache\....."

I recommend to use the ClassLoader.getResource() method. Because this method can also fetch back the file path even within the jar package.
Now let me show you a simple demo.
Assuming that we have the following folder in Disk D:

D:\ TestProject         |----->   src         |----->   bin                       |  ------> testcase                                          |--------> TestCase1.class                                          |--------> TestCase2.class                                          |--------> subfolder                                                              |---------> TestCase3.class

so ,  actually the paths of these testcases are as follows:

Class Name	Absolute Path
TestCase1.class	D:\TestProject\bin\testcase\TestCase1.class
TestCase2.class	D:\TestProject\bin\testcase\TestCase2.class
TestCase3.class	D:\TestProject\bin\testcase\subfolder\TestCase3.class

Now, assuming that we are inside TestCase2,  so by following codes, we can get all these paths.

Reference CodeClassLoader loader = TestCase2.class.getClassLoader();

/**
 *   Code Part 1
 */
URL url = loader.getResource(TestCase1.class.getName().replaceAll("\\.","/")+".class");
String path = url.getPath();
//  here the output will be "/D:/TestProject/bin/testcase/TestCase1.class"

/**
 *   Code Part 2
 */
URL url = loader.getResource(TestCase2.class.getName().replaceAll("\\.","/")+".class");
String path = url.getPath();
//  here the output will be "/D:/TestProject/bin/testcase/TestCase2.class"


/**
 *   Code Part 3
 */
String rawPath = "subfolder/"+TestCase3.class.getName();
URL url = loader.getResource(rawPath.replaceAll("\\.","/")+".class");
String path = url.getPath();
//  here the output will be "/D:/TestProject/bin/testcase/subfolder/TestCase3.class"