Java OOP Herança

Hello, Java!

Superclasse

package com.java;

// Animal Superclass
public class Animal {
    private String move;
    private String feed;

    public String getMove() {
        return move;
    }

    public void setMove(String move) {
        this.move = move;
    }

    public String getFeed() {
        return feed;
    }

    public void setFeed(String feed) {
        this.feed = feed;
    }
}

Subclasses

package com.java;

// Bird subclass
public class Bird extends Animal {
    private String sing;

    public String getSing() {
        return sing;
    }

    public void setSing(String sing) {
        this.sing = sing;
    }
}

package com.java;

// Dog subclass
public class Dog extends Animal {
    private String bark;

    public String getBark() {
        return bark;
    }

    public void setBark(String bark) {
        this.bark = bark;
    }
}

Classe para testar a execução

package com.java;

// Testing class
public class Test {
    public static void main(String[] args) {
        Animal animal = new Animal();
        animal.setFeed("Every animal eats");

        System.out.println(animal.getFeed());

        Dog dog = new Dog();
        dog.setFeed("Dog eats dog food");

        System.out.println(dog.getFeed());

    }
}

Compilar e executar

# Compile
find . -name "*.java" | xargs javac -d bin

# Run
java -classpath bin com.java.view.Test