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Method overloading in java is the facility which allow us to write same name method with different arguments and hence different implementation.So now with the help of method overloading we can use same method name with different implementation and method overloading should we within same class. Let me explain you with the help of an example.

public  class prog{

void display() {
System.out.println("Method without argument") ;
}

void display(int x) {
System.out.println("X="+x) ;
}

void display(String x){
System.out.println("X="+x) ;
}

void display(String y, int x){
System.out.println(y) ;
System.out.println(x) ;
}

public static void main(String sush[ ]) {

  prog p = new prog();

  p.display( ) ;

  p.display(10) ;

  p.display("sushant") ;

  p.display("sush",20) ;

   }

}

In the above code we can see that display ( ) is overloaded with different arguments.

Important point regarding overloading

1> If we are passing int value then it will search for any overloaded method with integer argument, if not available then it will search for any method with its just higher type like long and again if it is also not available then it will search for its wrapper class definition Integer .For ex-

public  class prog{

void display(Integer x){
System.out.println("Integer="+x);
}

void display(long x){
System.out.println("Long="+x);
}

public static void main(String sush[ ]) {

  prog p = new prog();

  p.display(10);

   }

}

Rules to be followed while doing overloading 

1> Method name must be same.
2> Return type can be different.
3> Modifier can be different.
4> Parameters must be different as follows.
     a> Types of parameter.
     b> Number of parameter.
     c> Order of parameters type.

Note 1 : Method overloading will be used to achieve static / compile type ploymorphism. 

Note 2 : Try to execute the program passing byte value and defining overloaded with byte type , short type, int type, long type and lastly its wrapper type then if