getClass().getClassLoader().getResourceAsStream() is returning Null with Java 12

Question

I am working on Java upgrade of my spring boot application in IntelliJ. I am upgrading an application from Java 8 to Java 12. The application consists of tests, in which one test checks for file existence and get its content. Below is the code :

String fileName = "myFile.txt"; 
InputStream stream = getClass().getClassLoader().getResourceAsStream(filename);

This file exists at path: src\test\resources\myFile.txt

But it always returning null.

I have tried these lines but nothing worked :

• MyClass.class.getClassLoader().getResourceAsStream(filename);
• getClass().getResourceAsStream(filename)
• getClass().getResource(filename)
• getClass().getClassLoader().getResource(filename)
• getClass().getClassLoader().getResource("\src\test\resources\myFile.txt")

How to get the result with the latest Java?