Method Overloading,Default Values..

Method Overloading:

• Method Overloading in Java means defining multiple methods with the same name in a class, but with different parameter lists.

• It allows a class to perform similar actions in different ways based on the type or number of inputs.

Example:

public class SuperMarket
{
static String shopName="Pavithra";
String prodname;
int price;
public static void main(String []args)
{
SuperMarket Product1=new SuperMarket();
Product1.buy(10);
Product1.buy(15,100);
Product1.buy(10.5);
Product1.buy(10.5f);
System.out.println(10);
System.out.println(10.5f);
System.out.println("hii");
}
void buy(double dd)
{
System.out.println("buy one double arg"+dd);
}
void buy(int no)
{
System.out.println("buy one arg"+no);
}
void buy(int n01,int n02)
{
System.out.println("buy two args"+n01+""+n02);
}
}

`

Output:

buy one arg10
buy two args15100
buy one double arg10.5
buy one double arg10.5
10
10.5
hii

Default values:

In Java, default values are the values that Java automatically assigns to instance variables if you don’t give them a value.

• For example, numbers get 0, booleans get false, and objects (like String) get null.
• This happens only for variables declared in a class, not inside methods.

Local variables must be given a value before you use them — Java will show an error if you don’t.