Lesson 02: javac, jdk and Datatypes in java

 

Javac :

• Java compiler Java compiler converts high level source code that is daba program into byte code
• whenever a Java Program is compiled it produces a file having dot class extension.
• for each class present in our Java program the dot class file contains bytecode of respective class
• Java program can be compiled by using following syntax
•  javac java_file_name.java

Java:

• This is a Java interpreter. The Java interpreter converts the bytecode into native machine level code ( that is into code that can be understand by operating system ) close and execute Java program.
• A Java Program can be executed by specifying name of the class which contains main ()
• java_class_name having main() function

Data Types in Java