All Java Programs

Q)First java program.
A)
public class ClassEx {

    public static void main(String[] args) {
   
    System.out.println("First program");   
    }
}


class: class keyword is used to declare a class in java.
public: public   keyword is an access modifier which represents visibility, it means it is visible to all.
static: static is a keyword, if we declare any method as static, it is known as static method. The core advantage of static method is that there is no need to create object to invoke the static method. The main method is executed by the JVM, so it doesn't require to create object to invoke the main method. So it saves memory.
void:void is the return type of the method, it means it doesn't return any value.
main :main represents startup of the program.
String[] args: String[] args is used for command line argument.
System.out.println() :System.out.println() is used print statement.
System:java.long.System is a class
out:out is a object of system class
println():println() is a mthod of print stream class
Q)Can i change the order of public static void main(String[] args) to static  public void main(String[] args)  ?
A)Yes  you can change  ,JVM won't throws any exceptions.