protected Class<?> loadClass(String name, boolean resolve)
  throws ClassNotFoundException
{
  synchronized (getClassLoadingLock(name)) {
    // First, check if the class has already been loaded
    Class<?> c = findLoadedClass(name);
    if (c == null) {
      long t0 = System.nanoTime();
      try {
        if (parent != null) {
          c = parent.loadClass(name, false);
        } else {
          c = findBootstrapClassOrNull(name);
        }
      } catch (ClassNotFoundException e) {
        // ClassNotFoundException thrown if class not found
        // from the non-null parent class loader
      }
      if (c == null) {
        // If still not found, then invoke findClass in order
        // to find the class.
        long t1 = System.nanoTime();
        c = findClass(name);
        // this is the defining class loader; record the stats
        sun.misc.PerfCounter.getParentDelegationTime().addTime(t1 - t0);
        sun.misc.PerfCounter.getFindClassTime().addElapsedTimeFrom(t1);
        sun.misc.PerfCounter.getFindClasses().increment();
      }
    }
    if (resolve) {
      
      Class(c);
    }
    return c;
  }
}

package com.mythsman.test;
public class Hello {
  public void say() {
    System.out.println("This is from Hello v1");
  }
}

package com.mythsman.test;
public class Hello {
  public void say() {
    System.out.println("This is from Hello v2");
  }
}

ClassLoader classLoader1=new ClassLoader() {
  @Override
  public Class<?> loadClass(String s) throws ClassNotFoundException {
    try {
      if (s.equals("com.mythsman.test.Hello")) {
        byte[] classBytes = Files.readAllBytes(Paths.get("/home/myths/Desktop/test/Hello.class.1"));
        return defineClass(s, classBytes, 0, classBytes.length);
      }else{
        return super.loadClass(s);
      }
    }catch (IOException e) {
      throw new ClassNotFoundException(s);
    }
  }
};
ClassLoader classLoader2=new ClassLoader() {
  @Override
  public Class<?> loadClass(String s) throws ClassNotFoundException {
    try {
      if (s.equals("com.mythsman.test.Hello")) {
        byte[] classBytes = Files.readAllBytes(Paths.get("/home/myths/Desktop/test/Hello.class.2"));
        return defineClass(s, classBytes, 0, classBytes.length);
      }else{
        return super.loadClass(s);
      }
    }catch (IOException e) {
      throw new ClassNotFoundException(s);
    }
  }
};

Object helloV1=classLoader1.loadClass("com.mythsman.test.Hello").newInstance();
Object helloV2=classLoader2.loadClass("com.mythsman.test.Hello").newInstance();
helloV1.getClass().getMethod("say").invoke(helloV1);
helloV2.getClass().getMethod("say").invoke(helloV2);

This is from Hello v1
This is from Hello v2

System.out.println("class:"+helloV1.getClass());
System.out.println("class:"+helloV2.getClass());
System.out.println("hashCode:"+helloV1.getClass().hashCode());
System.out.println("hashCode:"+helloV2.getClass().hashCode());
System.out.println("classLoader:"+helloV1.getClass().getClassLoader());
System.out.println("classLoader:"+helloV2.getClass().getClassLoader());

class:class com.mythsman.test.Hello
class:class com.mythsman.test.Hello
hashCode:1581781576
hashCode:1725154839
classLoader:com.mythsman.test.Main$1@5e2de80c
classLoader:com.mythsman.test.Main$2@266474c2

System.out.println(classLoader1.getParent().getParent().getParent());
System.out.println(classLoader1.getParent().getParent());
System.out.println(classLoader1.getParent());
System.out.println(classLoader1 );
System.out.println(ClassLoader.getSystemClassLoader());

null
sun.misc.Launcher$ExtClassLoader@60e53b93
sun.misc.Launcher$AppClassLoader@18b4aac2
com.mythsman.test.Main$1@5e2de80c
sun.misc.Launcher$AppClassLoader@18b4aac2