{"id":2038,"date":"2026-07-28T06:16:01","date_gmt":"2026-07-28T06:16:01","guid":{"rendered":"https:\/\/www.vpascode.com\/ja\/docs\/uncategorized\/java-visualizer-guide\/"},"modified":"2026-07-28T06:16:01","modified_gmt":"2026-07-28T06:16:01","slug":"java-visualizer-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/ja\/docs\/vpascode-docs\/java-visualizer-guide\/","title":{"rendered":"Java"},"content":{"rendered":"

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u8a08\u3001\u7d99\u627f\u968e\u5c64\u306e\u7ba1\u7406\u3001\u307e\u305f\u306f\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3092\u884c\u3046\u969b\u3001\u7d14\u7c8b\u306aJava\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u3068\u3001\u30af\u30e9\u30b9\u9593\u306e\u95a2\u4fc2\u3092\u53ef\u8996\u5316\u3059\u308b\u306e\u304c\u96e3\u3057\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002Java Visualizer<\/strong>\u306f\u3001Java\u306e\u30af\u30e9\u30b9\u5b9a\u7fa9\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u660e\u78ba\u3067\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u30af\u30e9\u30b9\u56f3\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u30af\u30e9\u30b9\u69cb\u9020\u3001\u30e1\u30f3\u30d0\u306e\u53ef\u8996\u6027\u3001\u7d99\u627f\uff08extends<\/code>\uff09\u3001\u304a\u3088\u3073\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\uff08implements<\/code>\uff09\u3092\u89e3\u6790\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u3084\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30fc\u30ad\u30c6\u30af\u30c8\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\u3092\u5373\u5ea7\u306b\u691c\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n

Java\u30d3\u30b8\u30e5\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306e\u4ed5\u7d44\u307f<\/h2>\n

VPasCode\u3067\u306f\u3001Java\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u304c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u30e1\u30bd\u30c3\u30c9\u3001\u95a2\u4fc2\u6027\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u81ea\u52d5\u7684\u306b\u69cb\u9020\u5316\u3055\u308c\u305fUML\u30b9\u30bf\u30a4\u30eb\u306e\u30af\u30e9\u30b9\u56f3\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u30af\u30e9\u30b9\u306f\u4e3b\u8981\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u30ab\u30fc\u30c9\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u53ef\u8996\u6027\u4fee\u98fe\u5b50\uff08public<\/code>, protected<\/code>, private<\/code>\uff09\u306f\u5c5e\u6027\u8a18\u53f7\u3068\u3057\u3066\u8868\u793a\u3055\u308c\u3001\u7d99\u627f\u307e\u305f\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5b9f\u88c5\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u30af\u30e9\u30b9\u30ce\u30fc\u30c9\u9593\u306e\u95a2\u4fc2\u63a5\u7d9a\u3092\u81ea\u52d5\u7684\u306b\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n

1. \u5fc5\u9808\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/h3>\n

\u6a19\u6e96\u7684\u306aJava\u30af\u30e9\u30b9\u968e\u5c64\u3092\u53ef\u8996\u5316\u3059\u308b\u306b\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u3001\u5177\u4f53\u7684\u306a\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u52d5\u7269\u30e2\u30c7\u30eb\u306e\u3088\u3046\u306a\u6a19\u6e96\u7684\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u968e\u5c64\u306f\u3001\u57fa\u672c\u7684\u306a\u30af\u30e9\u30b9\u95a2\u4fc2\u3092\u793a\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n

\n
\nJava<\/span>
\n
\n<\/path><\/path><\/svg>
\nVPasCode\u3067Java\u3092\u7de8\u96c6<\/span>
\n<\/a>\n<\/div>\n
\n
\r\n
\r\n Java<\/span>\r\n \r\n <\/path><\/path><\/svg>\r\n Edit Java in VPasCode<\/span>\r\n <\/a>\r\n <\/div>\r\n
\r\n 
\/\/ Java\u52d5\u7269\u968e\u5c64\u306e\u4f8b\r\npublic interface Playable {\r\n    void play();\r\n}\r\n\r\npublic interface Comparable {\r\n    int compareTo(Object other);\r\n}\r\n\r\npublic abstract class Animal implements Comparable {\r\n    protected String name;\r\n    private int age;\r\n\r\n    public Animal(String name, int age) {\r\n        this.name = name;\r\n        this.age = age;\r\n    }\r\n\r\n    public abstract void makeSound();\r\n\r\n    public String getInfo() {\r\n        return name + \"\u306f\" + age + \"\u6b73\u3067\u3059\";\r\n    }\r\n\r\n    public int compareTo(Object other) {\r\n        Animal a = (Animal) other;\r\n        return this.name.compareTo(a.name);\r\n    }\r\n}\r\n\r\npublic class Dog extends Animal implements Playable {\r\n    private String breed;\r\n    static String species = \"\u72ac\u79d1\";\r\n\r\n    public Dog(String name, int age, String breed) {\r\n        super(name, age);\r\n        this.breed = breed;\r\n    }\r\n\r\n    public void makeSound() {\r\n        System.out.println(\"\u308f\u3093\uff01\");\r\n    }\r\n\r\n    public void play() {\r\n        System.out.println(name + \"\u306f\u304a\u3082\u3061\u3083\u3092\u8ffd\u3044\u304b\u3051\u3066\u3044\u307e\u3059\");\r\n    }\r\n}\r\n\r\npublic class Cat extends Animal {\r\n    private String furColor;\r\n\r\n    public Cat(String name, int age, String furColor) {\r\n        super(name, age);\r\n        this.furColor = furColor;\r\n    }\r\n\r\n    public void makeSound() {\r\n        System.out.println(\"\u306b\u3083\u30fc\uff01\");\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\nVPasCode\u3067Java\u3092\u7de8\u96c6<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u9ad8\u5ea6\u306a\u69cb\u9020\u6280\u8853<\/h2>\n
Java\u30d3\u30b8\u30e5\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u30e2\u30c7\u30eb\u3001\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30b5\u30fc\u30d3\u30b9\u5c64\u3001\u30ea\u30dd\u30b8\u30c8\u30ea\u3084\u30d5\u30a1\u30af\u30c8\u30ea\u306a\u3069\u306e\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u7279\u306b\u52b9\u679c\u7684\u306b\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n
1. \u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30baE\u30b3\u30de\u30fc\u30b9\u30c9\u30e1\u30a4\u30f3\u30e2\u30c7\u30eb\u968e\u5c64<\/h3>\n
\u6ce8\u6587\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u62bd\u8c61\u6c7a\u6e08\u30cf\u30f3\u30c9\u30e9\u3001\u5177\u4f53\u7684\u306a\u30c1\u30a7\u30c3\u30af\u30a2\u30a6\u30c8\u5b9f\u88c5\u3092\u5ba3\u8a00\u3059\u308b\u3053\u3068\u3067\u3001VPasCode\u306f\u8907\u96d1\u306a\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30c9\u30e1\u30a4\u30f3\u30e2\u30c7\u30eb\u3092\u660e\u78ba\u306a\u30af\u30e9\u30b9\u30ce\u30fc\u30c9\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u307e\u3059\uff1a<\/p>\n
\n
\nJava<\/span>
\n
\n<\/path><\/path><\/svg>
\nVPasCode\u3067Java\u3092\u7de8\u96c6<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    Java<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
public interface PaymentProcessor {\r\n    boolean processPayment(double amount);\r\n}\r\n\r\npublic abstract class Order {\r\n    private String orderId;\r\n    protected double totalAmount;\r\n\r\n    public Order(String orderId, double totalAmount) {\r\n        this.orderId = orderId;\r\n        this.totalAmount = totalAmount;\r\n    }\r\n\r\n    public abstract void fulfill();\r\n}\r\n\r\npublic class CreditCardOrder extends Order implements PaymentProcessor {\r\n    private String cardNumber;\r\n\r\n    public CreditCardOrder(String orderId, double totalAmount, String cardNumber) {\r\n        super(orderId, totalAmount);\r\n        this.cardNumber = cardNumber;\r\n    }\r\n\r\n    public boolean processPayment(double amount) {\r\n        return true;\r\n    }\r\n\r\n    public void fulfill() {\r\n        System.out.println(\"\u6ce8\u6587 \" + orderId + \" \u306f\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u3067\u5b8c\u4e86\u3057\u307e\u3057\u305f\u3002\");\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\nVPasCode\u3067Java\u3092\u7de8\u96c6<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u304a\u3088\u3073\u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u69cb\u9020\u5316<\/h2>\n
\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u5c64\u3068\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u95a2\u4fc2\u3092\u53ef\u8996\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30c1\u30fc\u30e0\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30de\u30c3\u30d4\u30f3\u30b0\uff08ORM\uff09\u69cb\u9020\u304a\u3088\u3073\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u62bd\u8c61\u5316\u5c64\u3092\u691c\u8a3c\u3067\u304d\u308b\u3002<\/p>\n
1. \u30e6\u30fc\u30b6\u30fc\u7ba1\u7406\u304a\u3088\u3073\u30ea\u30dd\u30b8\u30c8\u30ea\u5c64<\/h3>\n
\u660e\u78ba\u306a\u95a2\u5fc3\u306e\u5206\u96e2\u3092\u53ef\u8996\u5316\u3059\u308b\u305f\u3081\u306b\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3001\u30c7\u30fc\u30bf\u8ee2\u9001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08DTO\uff09\u3001\u30b5\u30fc\u30d3\u30b9\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6574\u7406\u3059\u308b\uff1a<\/p>\n
\n
\nJava<\/span>
\n
\n<\/path><\/path><\/svg>
\nVPasCode\u3067Java\u3092\u7de8\u96c6<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    Java<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
public interface UserRepository {\r\n    User findById(String id);\r\n    void save(User user);\r\n}\r\n\r\npublic class User {\r\n    private String id;\r\n    private String username;\r\n    private String email;\r\n\r\n    public User(String id, String username, String email) {\r\n        this.id = id;\r\n        this.username = username;\r\n        this.email = email;\r\n    }\r\n\r\n    public String getUsername() {\r\n        return username;\r\n    }\r\n}\r\n\r\npublic class UserServiceImpl implements UserRepository {\r\n    public User findById(String id) {\r\n        return new User(id, \"johndoe\", \"john@example.com\");\r\n    }\r\n\r\n    public void save(User user) {\r\n        System.out.println(\"\u30e6\u30fc\u30b6\u30fc\u3092\u4fdd\u5b58\u4e2d: \" + user.getUsername());\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\nVPasCode\u3067Java\u3092\u7de8\u96c6<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u6226\u7565\u7684\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n
    \n
  • \u660e\u78ba\u306a\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u3092\u5ba3\u8a00\u3059\u308b\uff1a<\/strong>\u5e38\u306bpublic<\/code>, protected<\/code>\u3001\u307e\u305f\u306fprivate<\/code>\u30af\u30e9\u30b9\u56f3\u304c\u30e1\u30f3\u30d0\u306e\u53ef\u8996\u6027\u3092\u660e\u78ba\u306b\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3002<\/li>\n
  • \u632f\u308b\u821e\u3044\u5951\u7d04\u306b\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u7528\u3059\u308b\uff1a<\/strong>\u632f\u308b\u821e\u3044\u5951\u7d04\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/code>\u5b9a\u7fa9\u306b\u5206\u96e2\u3057\u3001implements<\/code>\u53ef\u8996\u7684\u306a\u95a2\u4fc2\u3092\u5206\u96e2\u3057\u305f\u72b6\u614b\u306b\u4fdd\u3064\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3002<\/li>\n
  • \u62bd\u8c61\u30af\u30e9\u30b9\u306e\u5883\u754c\u3092\u660e\u78ba\u306b\u4fdd\u3064\uff1a<\/strong>\u5171\u6709\u72b6\u614b\u304a\u3088\u3073\u57fa\u672c\u5b9f\u88c5\u306babstract class<\/code>\u3092\u4f7f\u7528\u3057\u3066\u3001\u660e\u78ba\u306a\u968e\u5c64\u7684\u30af\u30e9\u30b9\u30c4\u30ea\u30fc\u3092\u751f\u6210\u3059\u308b\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    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