The following steps are follwed to create and execute a java program.
1 . Create the program using any text editor such as notepad or word pad etc. The general form for saving the created program in a file is
filename.java
Where,
filename - Name of the class containing the main method
java - Keyword
Ths file is called source file. If the program has more than one class, the file name must be the name of the main class.
Example
class Sample // main class
{
public static void main(String args[])
{
-------------------------
-------------------------
}
}
Store this program as Sample.java
2 . Compile the created programs using java compiler. The general form of compile command is
javac sourcefilename.java
Where,
javac - name of the java compiler
sourcefilename - name of the already created source file.
Java compiler creates a file called class file which cotains platform independent bytecodes of the program. The compiler automatically names the class file. The general form is
classname.class
Where,
classname - name of the main method class in our program
class - keyword
Example
Name of our source file - Sample.java
Compilation command - javac Sample.java
This create a class file as Sample.class
3 . Run the compiled program using java interpreter. The general form of run command is
java classname
Where,
java - name of the java interpreter
classname - name of the main method class in our program
Java Interpreter produces machine code from the bytecode and run the program.
Example
Name of our source file - Sample.java
Name of class file - Sample.class
To run the program give the run command at the command prompt as
c>java Sample
No comments:
Post a Comment