Topic 3: Java main method

All Java applications begin execution by calling main( ).

 

public static void main(String args[]) {

• The public keyword is an access specifier.

• The keyword static allows main( ) to be called without having to instantiate a particular instance of the class. main( ) is called by the Java Virtual Machine before any objects are created. 

• The keyword void simply tells the compiler that main( ) does not return a value.

• main( ) is the method called when a Java application begins. Java compiler will compile classes that do not contain a main( ) method but cannot run these classes.

• String args[ ], declares a parameter named args, which is an array of instances of the class String. args receives any command-line arguments passed during program execution.

• println( ) displays the string which is passed to it.

• System is a predefined class that provides access to the system, and out is the output stream that is connected to the console.

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