javac Test.java
java Test

Error: Could not find or load main class Test

java -cp . Test

export J2SDKDIR=/usr/lib/jvm/oracle_jdk8
export J2REDIR=/usr/lib/jvm/oracle_jdk8/jre
export PATH=$PATH:/usr/lib/jvm/oracle_jdk8/bin:/usr/lib/jvm/oracle_jdk8/db/bin:/usr/lib/jvm/oracle_jdk8/jre/bin
export JAVA_HOME=/usr/lib/jvm/oracle_jdk8
export DERBY_HOME=/usr/lib/jvm/oracle_jdk8/db
export CLASSPATH="/usr/lib/jvm/oracle_jdk8/lib"

echo $CLASSPATH gives the directory `/usr/lib/jvm/oracle_jdk8/lib` and
echo %JAVA_HOME gives the directory `/usr/lib/java/jdk1.7.0_65`, which I find strange since I removed all versions of java before installing jdk1.8.

java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)