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Problem with macos switching jdk version
problem description
system version: macos10.13.6-2018003 update coexistence of jdk7 and jdk8 versions according to online configuration, alias command switching, I do not know whether it is successful
screenshot of the question
>> .bash_profile...
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How to modify the jvm parameter of tomcat itself?
you can modify the jvm parameters of an application in catalina.sh by declaring JAVA_OPTS, at the beginning of tomcat. Here are two places I do not quite understand, ask the bosses to advise: 1. If you set the jvm maximum heap memory limit to 2G here, d...
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Is there any other way to dynamically create objects by reflection?
is there any other way to dynamically create objects by reflection ...
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e88c52-f06.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e88c52-f06.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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