利用继承和组合实现软件复用

利用继承实现软件复用

class Animal
{
    private String type;
    public Animal(String type){
        this.type = type;
    }
    public void beat(){
        System.out.println(this.getType()+"心脏在不停跳动。。。");
    }
    public void breath(){
        beat();
        System.out.println(this.getType()+"呼吸中。。。");
    }
    public String getType(){
        return this.type;
    }
}
class Bird extends Animal
{        
    public Bird(String type){
        super(type);
    }
    public void fly(){
        System.out.println(this.getType()+"在天空自由自在的飞翔");
    }
}
class Wolf extends Animal
{        
    public Wolf(String type){
        super(type);
    }
    public void run(){
        System.out.println(this.getType()+"在天空自由自在的飞翔");
    }
}
public class AnimalTest 
{
    public static void main(String[] args)
    {
        Bird b = new Bird("鸟");
        b.breath();
        Wolf c = new Wolf("狼");
        c.breath();
    }
}

利用组合实现软件复用

class Animal    //该类里的方法或Filed应是复用对象共同拥有的
{
    private String type;
    public Animal(String type){
        this.type = type;
    }
    public void beat(){
        System.out.println(this.getType()+"心脏在不停跳动。。。");
    }
    public void breath(){
        beat();
        System.out.println(this.getType()+"呼吸中。。。");
    }
    public String getType(){
        return this.type;
    }
}
class Bird
{
    private Animal a;        
    public Bird(Animal a){
        this.a = a;        //this.a = a = a1 = Animal@1db9742
}
    public void breath(){
        a.breath();        //a1.bteath();
    }
    public void fly(){
        System.out.println((this.a).getType()+"在天空自由自在的飞翔");
    }
}
class  Wolf
{
    private Animal a;
    public Wolf(Animal a){
        this.a = a;        //this.a = a = a2 = Animal@106d69c
    }
    public void breath(){
        a.breath();
    }
    public void run(){
        System.out.println((this.a).getType()+"在陆地上自由奔跑");
    }
}
public class CompositeTest
{
    public static void main(String[] args)
    {
        Animal a1 = new Animal("鸟");
        Bird b = new Bird(a1);
        b.breath();
        b.fly();
        Animal a2 = new Animal("狼");
        Wolf c = new Wolf(a2);
        c.breath();
        c.run();
    }    
}