ToString method

[sumaraghavi ragha]

HI All

Can any one please tell me what is the use of a toString menthod

With an example

Thanks

[Ankit Garg]

When you try to access the value of an Object (reference variable) like this

System.out.println(obj);
OR
String s = "Hello"+obj;

Then the compiler calls the toString() method on that object. So after compilation you code would look like-
System.out.println(obj.toString());
OR
String s = "hello"+obj.toString();

As a developer your job is to provide a toString method with your class and return the relevant details about the object as a String from the toString method.

Eg.

class Pizza
{
   private String type;
   private int price;
   public void setPrice(int newPrice)
   {
      if(newPrice > 0)
      {
            price = newPrice;
      }
   }
   public void setType(String newType)
   {
      type = newType;
   }
   public String toString()
   {
      return "Your " + type + " Pizza Costs " + price + "$";
   }
}