Testing media cache

Believe in any use JAVA Language developers , Will be on a new PC Put it on JDK,JRE, Used to compile what we have written .java file , Then let it generate the compiled .class file , So that we can strive for implementation ... If you are interested, you can have a brief introduction JDK and JRE The role of .

When we install JDK When , I believe you will go through a very important step , Is to configure environment variables . also , It is not taboo to say , For the first time contact java Beginners , Always configure environment variables , I don't know , Let's start with configuring environment variables today , Thoroughly understand what core issues he involves ----- Class loader ...