diff options
| -rw-r--r-- | java.html.markdown | 54 |
1 files changed, 31 insertions, 23 deletions
diff --git a/java.html.markdown b/java.html.markdown index 34da903a..39878c8f 100644 --- a/java.html.markdown +++ b/java.html.markdown @@ -513,14 +513,9 @@ public class ExampleClass extends ExampleClassParent implements InterfaceOne, } } -<<<<<<< HEAD // There are also two special types of classes, abstract and final. -// Marking a class as abstract means that it contains abstract methods that must -// be defined in a child class. Similar to interfaces, abstract classes cannot -// be instantiated, but instead must be extended and the abstract methods -// defined. Different from interfaces, abstract classes can contain a mixture of -// concrete and abstract methods. + public abstract class Mammal() { // Abstract classes can contain concrete methods. @@ -539,17 +534,6 @@ public abstract class Mammal() public abstract String getBinomialNomenclature(); } -// Final classes are classes that cannot be inherited from and are therefore a -// final child. In a way, final classes are the opposite of abstract classes -// because abstract classes must be extended, but final classes cannot be -// extended. -public final class SaberToothedCat extends Mammal -{ - public String getBinomialNomenclature() - { - return "Smilodon fatalis"; - } -======= // Abstract Classes // Abstract Class declaration syntax @@ -558,10 +542,13 @@ public final class SaberToothedCat extends Mammal // // Method declarations // } -// Methods can't have bodies in an interface, unless the method is -// static. Also variables are NOT final by default, unlike an interface. -// Also abstract classes CAN have the "main" method. -// Abstract classes solve these problems. +// Marking a class as abstract means that it contains abstract methods that must +// be defined in a child class. Similar to interfaces, abstract classes cannot +// be instantiated, but instead must be extended and the abstract methods +// defined. Different from interfaces, abstract classes can contain a mixture of +// concrete and abstract methods. Methods in an interface cannot have a body, +// unless the method is static, and variables are final by default, unlike an +// abstract class. Also abstract classes CAN have the "main" method. public abstract class Animal { @@ -578,7 +565,7 @@ public abstract class Animal // No need to initialize, however in an interface // a variable is implicitly final and hence has // to be initialized. - private int age; + protected int age; public void printAge() { @@ -615,7 +602,28 @@ class Dog extends Animal pluto.eat(); pluto.printAge(); } ->>>>>>> adambard/master +} + +// Final Classes +// Final Class declaration syntax +// <access-level> final <final-class-name> { +// // Constants and variables +// // Method declarations +// } + +// Final classes are classes that cannot be inherited from and are therefore a +// final child. In a way, final classes are the opposite of abstract classes +// because abstract classes must be extended, but final classes cannot be +// extended. +public final class SaberToothedCat extends Animal +{ + // Note still have to override the abstract methods in the + // abstract class. + @Override + public void makeSound() + { + System.out.println("Roar"); + } } ``` |