Java Test ENV setup for Algorithms, 4th Edition

• set java env, add /home/linxu/myspace/java_projects/algs4/algs4.jar to CLASSPATH
  sudo vim ~/.bashrc
export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
export JRE_HOME=$JAVA_HOME/jre
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib:$JRE_HOME/lib

• test
  export CLASSPATH=$CLASSPATH:/home/linxu/myspace/java_projects/algs4/algs4.jar
javac -cp .:/home/linxu/myspace/java_projects/algs4/algs4.jar Shell.java -Xlint
java -cp .:/home/linxu/myspace/java_projects/algs4/algs4.jar edu.princeton.cs.algs4.Shell < tiny.txt
  Java Algorithms and Clients