{"id":204,"date":"2022-09-04T22:30:32","date_gmt":"2022-07-02T09:39:05","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%82%aa%e3%83%bc%e3%83%90%e3%83%bc%e3%83%a9%e3%82%a4%e3%83%89%e3%81%a8%e3%82%aa%e3%83%bc%e3%83%90%e3%83%bc%e3%83%ad%e3%83%bc%e3%83%89\/"},"modified":"2025-07-31T21:38:19","modified_gmt":"2025-07-31T12:38:19","slug":"java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%82%aa%e3%83%bc%e3%83%90%e3%83%bc%e3%83%a9%e3%82%a4%e3%83%89%e3%81%a8%e3%82%aa%e3%83%bc%e3%83%90%e3%83%bc%e3%83%ad%e3%83%bc%e3%83%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%82%aa%e3%83%bc%e3%83%90%e3%83%bc%e3%83%a9%e3%82%a4%e3%83%89%e3%81%a8%e3%82%aa%e3%83%bc%e3%83%90%e3%83%bc%e3%83%ad%e3%83%bc%e3%83%89\/","title":{"rendered":"Java\u306b\u304a\u3051\u308b\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9"},"content":{"rendered":"

\u306f\u3058\u3081\u306b<\/h3>\n

\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u6838\u7684\u306a\u6982\u5ff5\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u304a\u3044\u3066\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u306f\u3001OOPS\u306e\u6982\u5ff5\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n

\"Overriding<\/div>\n

\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3068\u5b50\u30af\u30e9\u30b9\u3067\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3\uff08\u540d\u524d\u3068\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u304c\u540c\u3058\u5834\u5408\u3001\u305d\u308c\u306f\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u540c\u3058\u30af\u30e9\u30b9\u5185\u306e2\u3064\u4ee5\u4e0a\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u540c\u3058\u540d\u524d\u3067\u7570\u306a\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6301\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u306f\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n

\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3092\u6bd4\u8f03\u3059\u308b<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n
Overriding<\/th>\nOverloading<\/th>\n<\/tr>\n<\/thead>\n
Implements \u201cruntime polymorphism\u201d<\/td>\nImplements \u201ccompile time polymorphism\u201d<\/td>\n<\/tr>\n
The method call is determined at runtime based on the object type<\/td>\nThe method call is determined at compile time<\/td>\n<\/tr>\n
Occurs between superclass and subclass<\/td>\nOccurs between the methods in the same class<\/td>\n<\/tr>\n
Have the same signature (name and method arguments)<\/td>\nHave the same name, but the parameters are different<\/td>\n<\/tr>\n
On error, the effect will be visible at runtime<\/td>\nOn error, it can be caught at compile time<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u4f8b<\/h2>\n

\u4ee5\u4e0b\u306b\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306e\u4f8b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

package<\/span> com.<\/span>scdev.<\/span>examples<\/span>;<\/span>\r\n\r\nimport<\/span> java.<\/span>util.<\/span><\/span>Arrays<\/span><\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Processor<\/span> {<\/span>\r\n\r\n\tpublic<\/span> void<\/span> process<\/span>(<\/span>int<\/span> i,<\/span> int<\/span> j)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out.<\/span>printf<\/span>(<\/span>\"Processing two integers:%d, %d\"<\/span>,<\/span> i,<\/span> j)<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> void<\/span> process<\/span>(<\/span>int<\/span>[<\/span>]<\/span> ints)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"Adding integer array:\"<\/span> +<\/span> Arrays<\/span>.<\/span>toString<\/span>(<\/span>ints)<\/span>)<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> void<\/span> process<\/span>(<\/span>Object<\/span>[<\/span>]<\/span> objs)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"Adding integer array:\"<\/span> +<\/span> Arrays<\/span>.<\/span>toString<\/span>(<\/span>objs)<\/span>)<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> MathProcessor<\/span> extends<\/span> Processor<\/span> {<\/span>\r\n\r\n\t@Override<\/span>\r\n\tpublic<\/span> void<\/span> process<\/span>(<\/span>int<\/span> i,<\/span> int<\/span> j)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"Sum of integers is \"<\/span> +<\/span> (<\/span>i +<\/span> j)<\/span>)<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n\t@Override<\/span>\r\n\tpublic<\/span> void<\/span> process<\/span>(<\/span>int<\/span>[<\/span>]<\/span> ints)<\/span> {<\/span>\r\n\t\tint<\/span> sum =<\/span> 0<\/span>;<\/span>\r\n\t\tfor<\/span> (<\/span>int<\/span> i :<\/span> ints)<\/span> {<\/span>\r\n\t\t\tsum +=<\/span> i;<\/span>\r\n\t\t}<\/span>\r\n\t\tSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>\"Sum of integer array elements is \"<\/span> +<\/span> sum)<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9<\/h3>\n
\u30d7\u30ed\u30bb\u30c3\u30b5\u306eprocess()\u30e1\u30bd\u30c3\u30c9\u3068int i\u3001int j\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306f\u3001\u5b50\u30af\u30e9\u30b9\u306eMathProcessor\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u308c\u3066\u3044\u307e\u3059\u30027\u884c\u76ee\u306823\u884c\u76ee\u3002<\/p>\n
public<\/span> class<\/span> Processor<\/span> {<\/span>\r\n\r\n    public<\/span> void<\/span> process<\/span>(<\/span>int<\/span> i,<\/span> int<\/span> j)<\/span><\/mark> {<\/span> \/* ... *\/<\/span> }<\/span>\r\n\r\n}<\/span>\r\n\r\n\/* ... *\/<\/span>\r\n\r\nclass<\/span> MathProcessor<\/span> extends<\/span> Processor<\/span> {<\/span>\r\n \r\n    @Override<\/span>\r\n    public<\/span> void<\/span> process<\/span>(<\/span>int<\/span> i,<\/span> int<\/span> j)<\/span><\/mark> {<\/span>  \/* ... *\/<\/span> }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u305d\u3057\u3066\u3001\u5b50\u30af\u30e9\u30b9\u3067\u3082process()\u30e1\u30bd\u30c3\u30c9\u3068int[] ints\u306f\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u308c\u307e\u3059\u3002\u30e9\u30a4\u30f311\u3068\u30e9\u30a4\u30f328\u3002<\/p>\n
public<\/span> class<\/span> Processor<\/span> {<\/span>\r\n\r\n    public<\/span> void<\/span> process<\/span>(<\/span>int<\/span>[<\/span>]<\/span> ints)<\/span><\/mark> {<\/span> \/* ... *\/<\/span> }<\/span>\r\n\r\n}<\/span>\r\n\r\n\/* ... *\/<\/span>\r\n\r\nclass<\/span> MathProcessor<\/span> extends<\/span> Processor<\/span> {<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> process<\/span>(<\/span>Object<\/span>[<\/span>]<\/span> objs)<\/span><\/mark> {<\/span> \/* ... *\/<\/span> }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0<\/h3>\n
Processor\u30af\u30e9\u30b9\u3067process\uff08\uff09\u30e1\u30bd\u30c3\u30c9\u304c\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3055\u308c\u3066\u3044\u307e\u3059\u30027\u884c\u76ee\u300111\u884c\u76ee\u300115\u884c\u76ee\uff1a<\/p>\n
public<\/span> class<\/span> Processor<\/span> {<\/span>\r\n\r\n    public<\/span> void<\/span> process<\/span>(<\/span><\/mark>int<\/span> i,<\/span> int<\/span> j)<\/span><\/mark> {<\/span> \/* ... *\/<\/span> }<\/span>\r\n\r\n    public<\/span> void<\/span> process<\/span>(<\/span><\/mark>int<\/span>[<\/span>]<\/span> ints)<\/span><\/mark> {<\/span> \/* ... *\/<\/span> }<\/span>\r\n\r\n    public<\/span> void<\/span> process<\/span>(<\/span><\/mark>Object<\/span>[<\/span>]<\/span> objs)<\/span><\/mark> {<\/span> \/* ... *\/<\/span> }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u304a\u3051\u308b\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306f\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3068\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u30e1\u30bd\u30c3\u30c9\u306e\u7f72\u540d\u304c\u540c\u3058\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u306e2\u3064\u4ee5\u4e0a\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u540c\u3058\u540d\u524d\u3092\u6301\u3063\u3066\u3044\u308b\u304c\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u7570\u306a\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u306f\u3058\u3081\u306b \u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u6838\u7684\u306a\u6982\u5ff5\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u304a\u3044\u3066\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u306f\u3001OOPS\u306e\u6982\u5ff5\u306e\u4e00\u3064\u3067\u3059\u3002 \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-204","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\nJava\u306b\u304a\u3051\u308b\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9 - 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