????1??JDK??Java Development Kit??java??????????л?????java??????????jre??
????2??JRE??Java Runtime Environment??java????????л?????java???е?????????+JVM(java?????)??
????3?????????????????java jdkin???μ??????????????????????У??????????ù????????????????????????ù????????????????????????????
???????????????????
????1???????÷????JAVA_HOME=%???·??%Javajdk
????path=%JAVA_HOME%in
????2??????????÷????set path=%path%;C:Program FilesJavajdkin
??????????????????·?????????е?????????У????path???????·???????
????classpath??????:
????1???????÷????classpath=.;c:;e:
????2??????????÷????set classpath=.;c:;e: