Here's a quick look at the three types of class loaders and everything you need to know to work with them in your Java programs. Java class loaders are a component of the Java virtual machine (JVM) ...

Along with lambdas, Java SE 8 brought method references to the Java language. This tutorial offers a brief overview of method references in Java, then gets you started using them with Java code ...

this is essential stuff. if windows is letting you get by without fixing up your classpath, that's nice, but you aren't going to get very far as a java developer without understanding these issues.