How to include a java class with main method in a bash script

script.sh

#!/bin/bash
set -e
TEMPFILE=`mktemp /tmp/ScriptXXXXX|sed -e 's/\.//g'`
CLASS_NAME=`basename "$TEMPFILE"`
JAVA_SOURCE=$TEMPFILE.java
cat <<EOF >$JAVA_SOURCE.tmp

//Write your java class here with a main method
//Be sure to leave the name of the class as Script 

public class Script {

  public static void main(String[] args) {
    System.out.println("Hello world");
    for (String arg:args) 
      System.out.println("arg="+ arg);
  }
}

EOF

## change the name of the class to match the file
sed "s/public class Script/public class $CLASS_NAME/g" $JAVA_SOURCE.tmp >$JAVA_SOURCE

## compile the java
javac $JAVA_SOURCE 

## run the class using all passed in parameters from the command line
java -classpath /tmp $CLASS_NAME "$@"