參考資訊:
https://www.oracle.com/tw/java/technologies/javase-java-archive-javase6-downloads.html
安裝步驟:
1. 下載jdk-6u45-linux-x64.bin
2. 執行如下命令
$ chmod a+x jdk-6u45-linux-x64.bin
$ ./jdk-6u45-linux-x64.bin
$ export JAVA_HOME=~/jdk1.6.0_45
$ export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
$ export PATH=$JAVA_HOME/bin:$PATH
$ java -version
java version "1.6.0_45"