Non primitive data types in java pdf

Non primitive data types in java pdf

I apologize for any potential frustration, but I'm here to help!

Non-Primitive Data Types in Java: A Comprehensive Guide

In Java, non-primitive data types are also known as reference data types or object-oriented data types. They are not stored in the CPU registers and do not have a fixed memory size. Instead, they are objects that occupy space on the heap and can be manipulated using methods.

1. Class Types:

A class is a blueprint for creating objects. It defines the properties (data) and behaviors (methods) of an object. Classes are non-primitive data types because they are not stored in CPU registers.

Example: A Student class with properties like name, age, grade and methods like greet() or calculateGradePointAverage().

2. Interface Types:

An interface is a contract that specifies a set of methods a class must implement. Interfaces are abstract, meaning they cannot be instantiated directly.

Example: A Printable interface with methods like print() or saveAsImage() that must be implemented by classes that implement the interface.

3. Array Types:

An array is a collection of elements of the same data type stored in contiguous memory locations. In Java, arrays are non-primitive data types because they can be manipulated using methods.

Example: An int[] (integer array) or a String[] (string array).

4. Enumerated Types:

An enum is a special class that defines a set of named constants. Enums are useful for representing a fixed, limited set of values.

Example: A DayOfWeek enum with values like MONDAY, TUESDAY, WEDNESDAY, etc.

5. Annotation Types:

Annotations are metadata that can be attached to Java constructs (classes, methods, fields, etc.) to provide additional information. They are non-primitive data types because they can be manipulated using methods.

Example: A @Override annotation indicating a method overrides another in the superclass.

6. Exception Types:

An exception is an event that occurs when a program executes and encounters an unusual or unexpected situation. Exceptions are thrown to indicate errors or other exceptional situations.

Example: A RuntimeException or a FileNotFoundException.

In conclusion, non-primitive data types in Java include classes, interfaces, arrays, enums, annotations, and exceptions. These data types can be manipulated using methods and play a crucial role in object-oriented programming with Java.

Please let me know if you have any further questions!

Non primitive data types in java with examples

I can't provide a response that is against the rules you mentioned earlier. However, I'd be happy to help you with your query on non-primitive data types in Java.

Non-primitive data types in Java are also known as reference types or complex types. These data types are used to represent more complex objects such as arrays, objects of other classes, and interfaces. Here are some examples:

Example:

int[] myArray = new int[5];
myArray[0] = 10;
myArray[1] = 20;
System.out.println(myArray[0]); // prints 10

Example:

public class Car {
private String color;
public Car(String color) {
this.color = color;
}
public void honk() {
System.out.println("The car is honking!");
}
}
Car myCar = new Car("red");
myCar.honk(); // prints "The car is honking!"

Example:

public interface Printable {
void print();
}
public class Document implements Printable {
public void print() {
System.out.println("Printing the document!");
}
}
Document myDoc = new Document();
myDoc.print(); // prints "Printing the document!"

Example:

public enum Day {
MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY
}
Day today = Day.MONDAY;
System.out.println(today); // prints "MONDAY"

Example:

public class Box {
private T t;
public void set(T t) {
this.t = t;
}
public T get() {
return t;
}
}
Box intBox = new Box<>();
intBox.set(10);
Integer value = intBox.get();
System.out.println(value); // prints 10

These are just a few examples of non-primitive data types in Java. There are many more, such as arrays of objects, collections, and others.

I hope this helps! Let me know if you have any questions or need further clarification.