Write a program to display the properties of Tv using Outer class and Inner class

Hello guys, welcome to lingarajtechhub.com . Today we are going to discuss the display the properties of Tv using Outer class and Inner class.

Code:

package com.Tv.java;
public class Tv {
  private String company="LG";
  
   class Details{
	   float inch=20.5f;
   }
	public static void main(String[] args) {
		Tv t=new Tv();
		
		Details d=t.new Details();
		System.out.println(t.company);
		System.out.println(d.inch);
	}

}

Line-1

• package com.Tv.java

It is a java package , this package is created in a java project and it contains classes & interfaces  inside the package.

Line-2

• public class Tv 

Tv  is the class name. class is a template used to create objects & class-name first letters must be capital. It is public means we can use this outside of the package.

Line-3

• private String company=”LG”

Here company is a variable.String is a class. It is not a data type.Here assign company value.It is private means we can’t access that value outside of the class.

Line-5

• class Details

Details are the class name. class is a template used to create objects. Inside the outer class we create the inner class.

Line-6

• float inch=20.5f

Here inch is a variable. float is a data type of the variable. Here assign inch value.

Line-8

• public static void main(String[] args) 

It is a main method in which we can execute a program.

•  public : It is an access modifier. The main() is public because we can access main() outside of the class , if main() can’t be public then JVM(Java Virtual Machine) can’t be called main() & code can’t be executed. 
•  Static : static is a keyword in which the main method has to be static in which JVM can load the class into memory and call the main method without creating an instance.
•  Void : Void is a data type. It means no return type. 
•  main(): Main is a function. 
•  String [] args : string means collection of characters ,String[] args represents a collection of Strings that are separated by a space and can be typed into the program on the terminal directly.

• Tv t=new Tv()

Here “t” is the instance variable.It is created to assign the default values to the instance variables of the class when an object is created.

• Details d=t.new Details()

Here “d” is the instance variable.It is created to assign the default values to the instance variables of the class when an object is created.

• System.out.println(t.company);

System.out.println(d.inch);

system is a predefined  class .Out is a static variable of type printstream present in system class. Println shows the result.