\u540c\u3058\u3088\u3046\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6574\u5217\u3055\u305b\u3066\u7ba1\u7406\u3057\u305f\u3044\u3068\u304d\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30a4\u30e1\u30fc\u30b8\u3068\u3057\u3066\u306fLIST\u306b\u8fd1\u3044\u3002<\/p>\n\n\n\n
package org.example.iterator;\r\n\r\npublic interface Iterator {\r\n public Object next();\r\n public boolean hasNext();\r\n}\r\n<\/code><\/pre>\n\n\n\npackage org.example.iterator;\r\n\r\npublic interface Aggregate {\r\n public Iterator iterator();\r\n}\r\n<\/code><\/pre>\n\n\n\npackage org.example.iterator;\r\n\r\npublic class ConcreteAggregate implements Aggregate{\r\n private Object[] objects;\r\n private int last = 0;\r\n\r\n public ConcreteAggregate(int maxSize)\r\n {\r\n this.objects = new Object[maxSize];\r\n }\r\n\r\n public void add(Object object)\r\n {\r\n objects[last] = object;\r\n last++;\r\n }\r\n\r\n public Object getItem(int index)\r\n {\r\n return objects[index];\r\n }\r\n\r\n public int getLast()\r\n {\r\n return last;\r\n }\r\n\r\n @Override\r\n public Iterator iterator() {\r\n return new ConcreteIterator(this);\r\n }\r\n}\r\n<\/code><\/pre>\n\n\n\npackage org.example.iterator;\r\n\r\npublic class ConcreteIterator implements Iterator {\r\n private ConcreteAggregate aggregate;\r\n private int index;\r\n\r\n public ConcreteIterator(ConcreteAggregate aggregate)\r\n {\r\n this.aggregate = aggregate;\r\n this.index = 0;\r\n }\r\n\r\n @Override\r\n public Object next() {\r\n Object object = aggregate.getItem(index);\r\n index++;\r\n return object;\r\n }\r\n\r\n @Override\r\n public boolean hasNext() {\r\n if(index < aggregate.getLast())\r\n {\r\n return true;\r\n }\r\n else\r\n {\r\n return false;\r\n }\r\n }\r\n}\r\n<\/code><\/pre>\n\n\n\npackage org.example.iterator;\r\n\r\npublic class Item {\r\n}\r\n<\/code><\/pre>\n\n\n\npackage org.example.iterator;\r\n\r\npublic class Main {\r\n public static void main(String[] args)\r\n {\r\n ConcreteAggregate aggregate = new ConcreteAggregate(10);\r\n aggregate.add(new Item());\r\n aggregate.add(new Item());\r\n aggregate.add(new Item());\r\n\r\n Iterator iterator = aggregate.iterator();\r\n while(iterator.hasNext())\r\n {\r\n Item item = (Item)iterator.next();\r\n }\r\n }\r\n}\r\n<\/code><\/pre>\n\n\n\n\u307e\u3041\u3001\u3053\u3093\u306a\u30b3\u30fc\u30c9\u66f8\u304b\u306a\u304f\u3066\u3082\u3001\u3059\u3067\u306bIterator\u30af\u30e9\u30b9\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3002<\/p>\n\n\n\n
List\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089iterator()\u3067\u53d6\u5f97\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u540c\u3058\u3088\u3046\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6574\u5217\u3055\u305b\u3066\u7ba1\u7406\u3057\u305f\u3044\u3068\u304d\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002 \u30a4\u30e1\u30fc\u30b8\u3068\u3057\u3066\u306fLIST\u306b\u8fd1\u3044\u3002 \u307e\u3041\u3001\u3053\u3093\u306a\u30b3\u30fc\u30c9\u66f8\u304b\u306a\u304f\u3066\u3082\u3001\u3059\u3067\u306bIterator\u30af\u30e9\u30b9\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3002 List\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089iterat … \u7d9a\u304d\u3092\u8aad\u3080 \u3010\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3011Iterator\u30d1\u30bf\u30fc\u30f3<\/span>