📚 In this video, we learn about classes and objects in Java.
💻 We create a class called 'calculator' and define methods and variables within it.
🔢 To add two numbers using the class, we declare variables, assign values to them, and use the addition operator.
💡 In object-oriented programming, objects are created by designing a class and then instantiating it.
📱 The manufacturing of an object is done by the JVM, so the focus should be on designing it.
🧮 Objects have properties and methods, which can be defined in a class. Methods perform actions, such as addition.
📝 In Java, methods are defined in classes using the 'method' keyword and can have parameters.
🔄 To call a method in Java, you need to create an instance of the class where the method is defined.
❌ Directly calling a method without an instance of the class will result in an error.
💡 To access a method from a different class in Java, you need both the design (class) and the object instance.
📱 In programming, we need both the design (class) and the object instance to perform specific actions or operations.
🔑 To create an object instance in Java, you specify the type (class) and create a reference variable to access its methods.
📚 Creating an object in Java involves using the 'new' keyword followed by the class name.
🔢 Initializing variables and accepting return values can be done using methods and constructors.
✅ By following these steps, you can successfully create and call methods on objects in Java.
📌 Using a specific value to be returned in a Java method by creating a variable and returning its value.
🔢 Understanding the importance of passing values when calling a method in Java.
💡 Differentiating between variable names to accurately assign values when calling a method in Java.
📚 Creating a class and object in Java allows you to organize variables and methods.
🔧 By using variables in the class instead of hardcoded values, you can easily pass different values to the object.
💡 To use the class, you need to create an object by specifying the class name, and then you can call methods on that object.