windows install the JDK environment configuration

JAVA_HOME：

　　Before you install the corresponding location of the JDK, I is C: \ Program Files \ Java \ jdk1.6.0_45

CLASSPATH：

　　 .;% JAVA_HOME% \ lib \ dt.jar;% JAVA_HOME% \ lib \ tools.jar ;. Note that front. ""

PATH：

　　 %java_home%\bin;%java_home%\jre\bin;