Hello guys, welcome to lingarajtechhub.com. Today we are going to discuss the display properties of Table using class & object in the oops concept.
Code:
package com.table_oops_class_obj.java; public class Table { String type; int price; void tab_input() { type="wood"; price=5000; } void tab_disp() { System.out.println("Table type:"+type); System.out.println("Table price:"+price); } public static void main(String[] args) { Table t=new Table(); t.tab_input(); t.tab_disp(); } }
Line-1:
- package com.table_oops_class_obj.java;
It is a java package , this package is created in a java project and it contains classes inside the package.
Line-3:
- public class Table
“Table” 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-4:
- String type
Here the type is the variable and String is a class. It is not a data type.
Line-5:
- int price
Here price is the variable and int (Integer) is a data type of the variable.
- void tab_input() {
type=”wood”;
price=5000;
}
In this line we create a method whose name takes tab_input() where store properties values.
- void tab_disp() {
System.out.println(“Table type:”+type);
System.out.println(“Table price:”+price);
}
In this line we create a method whose name takes tab_display().system is a predefined class .Out is a static variable of type printstream present in system class. Println shows the result.
- 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.
- Table t=new Table()
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.
- t.tab_input()
“t” is the instance variable which is created. “ .” is the connector .tab_input() is a method where our input values will be stored.
- t.tab_disp()
“t” is the instance variable which is created. “ .” is the connector . tab_display() is a method where our result will be stored.