Thinking about the configuration of Java environment variables

I've been using environment variables before but have never thought about why?

Java:

Java_home = E:\Study\Java\JDK7.0

In Path, set the

%java_home%lib; java_home\ Bin

Finally, do not add;

Principle: Internal words do is the concatenation of strings,

So you can also write this directly:

Java_home     =   E:\Study\Java\JDK7.0\bin; E:\Study\Java\JDK7.0\lib

So at the end of path you just need to add

......; %java_home%

After that you can enter path in the black box to see your path!

Thinking about the configuration of Java environment variables