Can I overload main method of a class?

Yes, you can overload main method of a class.

Application.java

package com.sample.app;

public class Application {

 public static void main(int a) {
  System.out.println("Value of a is : " + a);
 }

 public static void main(float b) {
  System.out.println("Value of b is : " + b);
 }

 public static void main(double c) {
  System.out.println("Value of c is : " + c);
 }

 public static void main(String args[]) throws Exception {
  main(10);
  main(10.02f);
  main(10.02);
 }
}

Output

Value of a is : 10

Value of b is : 10.02

Value of c is : 10.02

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