linux 下查看jdk版本
[javascript] view plaincopy ?
[root@localhost usr]# $JAVA_HOME/bin/java -version ? ?
bash: /bin/java: 没有那个文件或目录 ? ?
[root@localhost java]# . /etc/profile ? ?
[root@localhost java]# . /etc/profile ? ?
[root@localhost java]# $JAVA_HOME/bin/java -version ? ?
java version "1.6.0_20" ? ?
Java(TM) SE Runtime Environment (build 1.6.0_20-b02) ? ?
Java HotSpot(TM) Client VM (build 16.3-b01, mixed mode, sharing) ? ?
[root@localhost java]# which java ? //就是这个地方，擦！用的是/usr/bin/下面的java。 ??
/usr/bin/java ? ?
[root@localhost java]# mv /usr/bin/java /usr/bin/oldjava ?
[root@localhost java]# ln -s $JAVA_HOME/bin/java /usr/bin/java ? ?
[root@localhost java]# ? ?
[root@localhost java]# java -version ? ?
java version "1.6.0_20" ? ?
Java(TM) SE Runtime Environment (build 1.6.0_20-b02) ? ?
Java HotSpot(TM) Client VM (build 16.3-b01, mixed mode, sharing) ? ?
[root@localhost java]# ? ?
[root@localhost java]# javac -version ? ?
javac 1.6.0_20 ?
