- Object : "An object is a software bundle of related state and
behavior."
- Real-world objects share two characteristics:
- They all have state and behavior.
- state : object's status status and behavior is what object is doing.
- Class: "A class is a blueprint or prototype from which objects are created."
- Inheritance: "provides a powerful and natural mechanism for organizing and structuring your software."
- Interface: "An interface is a contract between a class and the outside world."
- Package: A package is a namespace for organizing classes and interfaces in a logical manner. Placing your code into packages makes large software projects easier to manage.
- A variable (space holder) retains the information of a primitive data-type or reference to an object
- An object is an instance of a particular class.
- For example, in the following example "String" is class and
"str1"
- String str1 ;// No Object is created
- str1 = new String ("Hello World");// a sting object is created
- How to use object!!
- int count = str1.length();
- System.out.println("length : " + count);
- The above will print the length of the string
- Reference assignment
