How do classes in Java call each other?
In Java, you can call a class’s methods and access its properties by creating an instance of the class. Here are examples of calling a class’s methods and accessing its properties.
- Instantiate an object of a class.
ClassName objectName = new ClassName();
ClassName represents the name of the class, objectName is the name of the object, and the statement new ClassName() is used to create an instance of the class.
- invoke methods of a class
objectName.methodName();
objectName is the name of the object, methodName() is the method name within the class, by connecting the object name and method name with a dot, you can call the class method.
- Accessing properties of a class:
objectName.attributeName;
In this case, objectName refers to the name of the object and attributeName refers to the property name within the class. By connecting the object name and property name with a “.”, you can access the class’s properties.
It is important to note that if a class’s methods and properties are static (marked with the keyword “static”), they can be directly accessed using the class name without the need to create an instance of the class. For example:
ClassName.methodName();
In this case, ClassName refers to the name of the class and methodName() is the name of a static method within the class. By connecting the class name and method name with a period, you can call the static method of the class. Accessing static properties of a class follows a similar method.
