Java ???:

Java ??? ?? Java? ???? ?????? ???? ???? ? ???? ?????. Java? ???? ??? ????? ? ???? ?? ??????. ???? ???? ??? ??? ? ?????. ?? ??? ???? ???? ? ??? ? ????.

Java? ???? ??????:

Java?? ???? ???? ??? ?? ?????. ???? ????? ??? ? ?????. ???? ??? ? ??? ?? ???? ???? ?????. ??? ????? ? ???? ??? ??? ??????. new() ???? ???? ??? ??? ??? ??? ??? ???? ?????.

???? ????? ???? ??? ???? ?? ??? ??????? ?? ? Java ????? ??? ?? ???? ? ????. ?? ???? ?? ?? ??? ?????? ????? ???? ??? ??? ???? ?? ?????.

Java ???? ?:

// Driver Class
class Geeks {

    // Constructor
    Geeks()
    {
        super();
        System.out.println("Constructor Called");
    }

    // main function
    public static void main(String[] args)
    {
        Geeks geek = new Geeks();
    }
}

** Java ???? Java ???? ??? ?????**

1.???? ??? ???? ??? ??? ??? ?? Java? ????? ???? ????.
2. ???? ?? ??? ?? ?? ???? ?? ??? ???? ???, ?? ???? ??? void???.
3. ???? ?? ?? ? ? ?? ????? ???? ?? ? ??? ? ????.

Java ???? ?? ??????

new() ???? ???? ??? ??? ??? ??? ??? ???(?? ???? ? ??)? ???? ??? ???? ??? ??? ?? ?? ?????. ??? ?? ??? ??? ????.

1.???? ???? ?? ???? ?? ??? ??? ??? ??? ??? ???.
2.Java? ???? ??, ??, ?? ?? ???? ? ????.
3. ??? ???? ??? ???? ???? ???? ??? ? ????. ?, ?? ???? ???? ??? ? ????.

Java? ??? ??(??)

??? ???? ??? ?? ??? ??? ?????. ??? Java?? ????? ? ?? ??? ???? ??? ???? ????.

3.?? ???

????:https://www.geeksforgeeks.org/constructors-in-java/

Java? ??? ????:

Java??? ???? ?? ???? ????? ? ????. ??? ????? ? ???? ?? ?? ??? ??? ? ??? ?? ?? ?? ??? ?? ? ? ??? ???? ?? ???? ??? ? ????.

??? ??? ????? ??? ???? ???. ??? ???? ??? ?? ????? ?? ?? ???? ???? ?? ??? ????.

?? ????? ???? ???? ?? ? Java ????? ?? ???? ????? ?? ???? ???. ??? ?? ????? ?????? ????? ???? ????? ???? ??? ?? ?? ???? ???? ????. ? ?? Java ????? ???? ???? ???? ??? ??????.

??? ?????? ? () ??:

??? ??? ???? ? ???? ??? ? ???, ?? ??? ???? ?? ???? ???? ? ??? ? ????.

?

// Driver Class
class Geeks {

    // Constructor
    Geeks()
    {
        super();
        System.out.println("Constructor Called");
    }

    // main function
    public static void main(String[] args)
    {
        Geeks geek = new Geeks();
    }
}

??:https://www.javatpoint.com/constructor-overloading-in-java

????:

    public class Student {  
    //instance variables of the class  
    int id,passoutYear;  
    String name,contactNo,collegeName;  

    Student(String contactNo, String collegeName, int passoutYear){  
    this.contactNo = contactNo;  
    this.collegeName = collegeName;  
    this.passoutYear = passoutYear;  
    }  

    Student(int id, String name){  
    this("9899234455", "IIT Kanpur", 2018);  
    this.id = id;  
    this.name = name;  
    }  

    public static void main(String[] args) {  
    //object creation  
    Student s = new Student(101, "John");  
    System.out.println("Printing Student Information: \n");  
    System.out.println("Name: "+s.name+"\nId: "+s.id+"\nContact No.: "+s.contactNo+"\nCollege Name: "+s.contactNo+"\nPassing Year: "+s.passoutYear);  
    }  
    }  

??:

public class SuperMarket
{
//class specific
static String name = "SB SuperMarket"; 
static int doorNo = 10; 
static boolean open = true; 
//non-static ---> Instance specific
String product_name; 
int price, discount; 

SuperMarket(String product_name, int price, int discount)
{
this.product_name = product_name; 
this.price = price; 
this.discount = discount; 
}

public static void main(String[] args)
{
SuperMarket product1 = new SuperMarket("cinthol", 22,2); 
SuperMarket product2 = new SuperMarket("biscuits",30,5);
SuperMarket product3 = new SuperMarket("cake",10,1); 
product1.sell();
product2.sell(); 
product3.sell();
product2.return_product(); 

}
public void return_product()
{
System.out.println("returning "+product_name);
}
public void sell()
{
System.out.println(product_name); 
System.out.println(price);
System.out.println(discount);
}
}

? ??? ?? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!