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ÔÚ linux ÖÐÉó²é jdk °æ±¾µÄÒªÁìÓУºÔËÐÐ “java -version” ÏÂÁî¡£ÔËÐÐ “javac -version” ÏÂÁ½öÊÊÓÃÓÚÒÑ×°Öà jdk µÄϵͳ£©¡£¼ì²é “/usr/lib/jvm” Ŀ¼ÖеÄÎļþ¡£Ê¹Óà “which java” ÏÂÁî²éÕÒ java ÏÂÁîµÄ·¾¶¡£Ê¹Óà “env | grep java_home” ÏÂÁîÉó²é java_home ÇéÐαäÁ¿¡£¹ØÓÚʹÓà update-alternatives ÖÎÀí java ×°ÖõÄϵͳ £¬ÔËÐÐ “update-alternatives

ÔõÑùÔÚ Linux ÖÐÉó²é JDK °æ±¾

ÔÚ Linux ϵͳÖÐÉó²éÒÑ×°ÖÃµÄ JDK °æ±¾ÓÐÒÔϼ¸ÖÖÒªÁ죺

1. Java -version ÏÂÁî

ÕâÊÇ×î³£¼ûµÄÏÂÁî £¬ËüÖ±½ÓÏÔʾ Java ÔËÐÐʱÇéÐÎ (JRE) ºÍ Java ¿ª·¢¹¤¾ß°ü (JDK) µÄ°æ±¾¡£

java -version

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2. javac -version ÏÂÁî

´ËÏÂÁî½öÊÊÓÃÓÚÒÑ×°Öà JDK µÄϵͳ £¬ËüÏÔʾ Java ±àÒëÆ÷µÄ°æ±¾ £¬¸Ã±àÒëÆ÷ÊÇ JDK µÄÒ»²¿·Ö¡£

javac -version

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3. ¼ì²éÎļþϵͳ

ÔÚ Ubuntu ϵͳÖÐ £¬Ä¬ÈÏÇéÐÎÏ £¬JDK ×°ÖÃÔÚ /usr/lib/jvm Ŀ¼Ï¡£Äú¿ÉÒÔÉó²é¸ÃĿ¼ÒÔÉó²éÒÑ×°ÖÃµÄ JDK °æ±¾£º

ls /usr/lib/jvm

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4. ʹÓà which ÏÂÁî²éÕÒ Java ÏÂÁî

which ÏÂÁî¿ÉÒÔÕÒµ½ Java ÏÂÁîµÄ·¾¶ £¬ÆäÖаüÀ¨ JDK °æ±¾ÐÅÏ¢£º

which java

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5. env ÏÂÁî

env ÏÂÁî¿ÉÒÔÏÔʾϵͳÇéÐαäÁ¿ £¬ÆäÖпÉÄÜ°üÀ¨ JAVA_HOME ±äÁ¿ £¬¸Ã±äÁ¿Ö¸Ïò JDK µÄ×°ÖÃĿ¼¡£

env | grep JAVA_HOME

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6. update-alternatives ÏÂÁî

¹ØÓÚʹÓà update-alternatives ÖÎÀí Java ×°ÖõÄϵͳ £¬Äú¿ÉÒÔʹÓÃÒÔÏÂÏÂÁîÉó²éÄ¿½ñµÄ JDK °æ±¾£º

update-alternatives --query java

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ÒÔÉϾÍÊÇlinuxÔõôÉó²éjdk°æ±¾µÄÏêϸÄÚÈÝ £¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡

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