Learning Java: Classes

If you are familiar with Object Oriented Programming, then it isn’t a surprise to know that it is all about classes, objects, methods, and attributes.

Creating an Object With a Class

public class Main {
}

A Java class is created with the class keyword.

Creating An Object

public class Main {
String word = "A word";
public static void main(String[] args) {
    Main myObj = new Main();
    System.out.println(myObj.word);
  }
}
=> A word

Creating Multiple Objects

public class Main {
String word = "A word";
public static void main(String[] args) {
    Main myObj = new Main();
    Main myObjTwo = new Main();
    System.out.println(myObj.word);
    System.out.println(myObjTwo.word);
  }
}
=> A word
=> A word

Creating Class Objects In Other Classes

public class Main {
 String word = "A word";
 public static void main(String[] args) {
     Main myObj = new Main();
     Main myObjTwo = new Main();
    System.out.println(myObj.word);
    System.out.println(myObjTwo.word);
 }
}
class AnotherClass {
  public static void main(String[] args) {
    Main myObjThree = new Main();
    System.out.println(myObjThree.word);
  }
}