I used to use C++, however after I learned a little Java I switched to it because I love the code generation and the warnings it generates.

 

Pass by value or by reference:

http://stackoverflow.com/questions/7893492/is-java-really-passing-objects-by-value

 

 

 Running Java program from command shell sometimes is not easy. Gradle helps you to do that. I went through these steps to get to this result:

 

Running Java program from command shell

Source: javaindos.

Let's say your file is in C:\mywork\

Run Command Prompt

C:> cd \mywork

This makes C:\mywork the current directory.

C:\mywork> dir

This displays the directory contents. You should see filenamehere.java among the files.

C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin

This tells the system where to find JDK programs.

C:\mywork> javac filenamehere.java

This runs javac.exe, the compiler. You should see nothing but the next system prompt...

C:\mywork> dir

javac has created the filenamehere.class file. You should see filenamehere.java and filenamehere.class among the files.

C:\mywork> java filenamehere

This runs the Java interpreter. You should then see your program output.

 

If the system cannot find javac, check the set path command. If javac runs but you get errors, check your Java text. If the program compiles but you get an exception, check the spelling and capitalization in the file name and the class name and the java HelloWorld command. Java is case-sensitive!