Java constructor

The keyword public static void main is the means by which you create a main method within the Java application . It’s the core method of the program and calls all others. It can’t return values and accepts parameters for complex command-line processing.

public is a Java keyword which declares a member’s access as public . Public members are visible to all other classes. This means that any other class can access a public field or method. Further, other classes can modify public fields unless the field is declared as final .

The Java Main Class If only a single Java class in your Java program contains a main() method, then the class containing the main() method is often referred to as the main class. You can have as many classes as you want in your project with a main() method in.

Example. public class Puppy { public Puppy() { } public Puppy(String name) { // This constructor has one parameter, name. } } Java also supports Singleton Classes where you would be able to create only one instance of a class. Note − We have two different types of constructors.