method overloading and type promotion in Java

Method overloading helps to create multiple methods with the same name to do similar action on a different type of parameters.

We can use type promotion in case variables are of similar type. Type promotion automatically promotes the lower range value to higher range value. For example, byte variable can be assigned to an int variable. Here byte variable will be type promoted to int. In case, we want to add two numbers which can be byte, short or int, we can use a single method. See the example below −

Example

 Live Demo

public class Tester {
   public static void main(String args[]) {
      Tester tester = new Tester();
      byte a = 1, b= 2;
      short c = 1, d = 2;
      int e = 1, f = 2;
      System.out.println(tester.add(a, b));
      System.out.println(tester.add(c, d));
      System.out.println(tester.add(e, f));
   }
   public int add(int a, int b) {
      return a + b;
   }
}

Output

3
3
3

Radhakrishna

Published on 02-Feb-2018 10:19:25

• Related Questions & Answers
• Method overloading in Java
• Method Overloading and null error in Java
• Method Overloading and Ambiguity in Varargs in Java
• Using Method Overloading in Java
• Method overloading with autoboxing and widening in Java.
• Function overloading and return type in C++
• What is method overloading in Java?
• Method overloading v/s method overriding in Java
• What is the difference between method overloading and method hiding in Java?
• What is the difference between method overloading and method overriding in Java?
• Why is method overloading not possible by changing the return type of the method only in java?
• Java Numeric Promotion in Conditional Expression
• Constructor overloading in Java
• Overloading in java programming
• What are the restrictions placed on method overloading in java?