There are very few Java-based OpenGL tutorials out there, unfortunately. Fortunately, all of the C++ methods look identical in LWJGL, the only difference is that you will often prefix them with the version number.
glClear, glClearColor, glBindTexture, etc were adopted "into core" in OpenGL 1.1 or earlier, and so you will find it in the GL11 class. Likewise, glUseProgram (shaders) was adopted into core in 2.0, so you look in GL20. When in doubt, search the method in google using "lwjgl" as a keyword. Static imports are also useful for readability.
You're in luck, though, as that tutorial has been ported to Java:https://github.com/rosickteam/OpenGL