Java Fundamentals

Java Fundamentals

1. Develepement cycle

   • design the application
   • write the source code
     • .java
   • test
   • fix bugs
   • distribute
     • .jar

2. Java Development Kit (JDK)

   • java debugging tool (jdb)
   • java compiler (javac)
   • java archiving tool (jar)
   • java runtime environment (JRE)
     • java virtual machine (JVM)

3. Integrated Development Environment (IDE)

   • Eclipse
   • NetBeans
   • Notepad++
   • Or other editor of choice

4. A Hallo world program

   • public static void main(String [ ] args)
     • public - for everyone to see
     • static - method can be run without creating an instance of the class containing the main method
     • void - method that doesn't return anything
     • main - the name of the method

5. comment

   • single line //
   • multiple line /* text */
   • documentation /** text */
   • are ignored by java compiler
   • explain what code is doing