Update 'README.md'

README.md

@@ -51,7 +51,6 @@ System.out.println(cars[1]);
 
 ```java
 class HelloWorld{
-
 	void printMessage() {
 		System.out.println("Hi");
 	}
@@ -64,7 +63,6 @@ class HelloWorld{
 
 ```java
 class HelloWorld{
-
 	int add(int a, int b){
 		return a + b;
 	}
@@ -123,15 +121,15 @@ abstract class Car {
 		System.out.println("screeeeech");
 	}
 }
+
 class Sedan extends Car{
 	void drive(){
 		System.out.println("vroom");
 	}
 }
-class HelloWorld{
 
+class HelloWorld{
 	void main(String[] args){
-
 		Sedan myCar = new Sedan();
 		myCar.drive();
 		myCar.stop();
@@ -143,11 +141,13 @@ class HelloWorld{
 interface Bird {
 	void fly();
 }
+
 class Swallow implements Bird {
 	public void fly() {
 		System.out.println("sweeeee");
 	}
 }
+
 class HelloWorld{
 	void main(String[] args){
 		Swallow stewart = new Swallow();