In Java programming, we can define two or more than two methods within the same class that share the same name but each method has the different parameter list.
Methods with the same name are known as an overloaded method and this process is called method overloading.
The overloaded method must be different in its argument list. Method overloading is
Syntax
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class className { void methodName() { // overloaded method } void methodName(int a) { // overloaded method } void methodName(char c) { // overloaded method } void methodName(int a, int b) {// overloaded method } } |
Example to overload a method show
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class ShowData { void show() { // overloaded method System.out.println("No parameter"); } void show(int a) { // overloaded method System.out.println("a =" + a); } void show(char c) { // overloaded method System.out.println("c = " + c); } void show(int a, int b) { // overloaded method System.out.println("a =" + a + " b= " + b); } } public class showDataTest { public static void main(String arg[]) { ShowData obj1 = new ShowData(); obj1.show(); obj1.show(10); obj1.show('s'); obj1.show(10, 20); } } |
Result
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No parameter a =10 c = s a =10 b= 20 |
Explanation: In the above class overload, we have created four methods with the same name but each method have the different parameter list.
Such a method is called an overloaded method and the process of creating multiple methods with the same name with