1. Forcing the use of English in JDK7 tools

javac -J-Duser.language=en xxx.java

java -Duser.language=en xxx

Execute below in the Run command window:

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REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v JAVA_TOOL_OPTIONS /d -Duser.language=en /t REG_SZ /f

Reference: http://stackoverflow.com/questions/6217297/forcing-the-use-of-english-in-jdk7-tools

2. Compile and run multiple classes

1.) Navigate to the directory of files

2.) mkdir bin

3.) javac *.java -d bin

4.) java -cp bin DogTestDrive