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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

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

1. Java -version ÏÂÁî

ÕâÊÇ×î³£¼ûµÄÏÂÁ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 ϵͳÖУ¬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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