I am trying to use objectweb ASM to read the bytecodes of a method in a class, for example java.lang.Integer. I tried following this example online but even a simple snippet generates an error.

Code Snippet

        try {
            new ClassReader("java.lang.Integer");
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

Error was java.lang.RuntimeException: java.io.IOException: Class not found.

Any help is appreciated.

References
https://www.baeldung.com/java-asm