Write Code a Java

How to Write Java

A Simple Java Program Let's now create a simple Java program using text editor called Notepad. First of all, put some Java code into the editor such as Notepad to create our first Java program, as shown in the following code snippet: below

class Simple

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{

public static void main(String args[] )

{

system.out.println("Hello world");

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}

}

In the above code snippet, the class keyword is used to declare  a class  called Simple. The name Simple is used as an identifier, which is used to give an appropriate name to a Let's take a look at the following line:

This is the line at which the program begins executing. It is by calling this main 0 method that all Java programs begin their execution. The line begins with public keyword which is an access specifier, making the main I method accessible outside the class in which it is declared. Static keyword allows main to exist before creating object of the class in which the main method is declared. void keyword specify that the main ( ) does not return any value. Java to a desired location on your system. Java programs are saved with the file extension '.java’. It is to be noted that in Java, name of the file should match with name of the class. Java is a case-sensitive language, that is the word 'hello' and 'Hello' have two different meanings in Java. Once a Java program is written, its time to compile and then run it to show the desired output.

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Compiling and Running the Program: To run a Java program, it is necessary to compile it first using Java compiler. This Java compiler is an application named javac.exe located in the Java directory bin folder.

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For more understanding you can also read below mentioned topic from online:

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