【java设计模式】【行为模式Behavioral Pattern】迭代器模式Iterator Pattern

package com.tn.pattern;

public class Client {
    public static void main(String[] args) {
        Object[] objs={"飞","雪","连","天","射","白","鹿","笑","书","神"};
        Aggregate aggregate=new ConcreteAggregate(objs);
        
        Iterator it=aggregate.iterator();
        it.first();
        it.next();
        System.out.println(it.isDone());
        it.currentItem();
        
        it.first();
        System.out.println("----------------------------------------");
        while(!it.isDone()){
            it.currentItem();
            it.next();
        }
    }
}

interface Iterator{
    void first();
    void next();
    boolean isDone();
    void currentItem();
}

interface Aggregate{
    Iterator iterator();
}

class ConcreteAggregate implements Aggregate{
    private Object[] datas=new Object[10];
    
    public ConcreteAggregate(Object[] objs){
        this.datas=objs;
    }
    
    public Iterator iterator(){
        return new ConcreteIterator();
    }
    
    class ConcreteIterator implements Iterator{
        private int index;
        @Override
        public void first() {
            index=0;
        }
        @Override
        public void next() {
            index++;
        }
        @Override
        public boolean isDone() {
            return index>=datas.length;
        }
        @Override
        public void currentItem() {
            if(index<datas.length)
                System.out.println(datas[index]);
        }
    }
}