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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ### 反射方式創建對象 ~~~ Class<?> aClass = Class.forName("domain.Person"); // 創建Class對象所表示對象的一個新實例,調用了Person的無參構造方法 Object o = aClass.newInstance(); System.out.println(o.toString()); //Person{name='null', age=0} ~~~ ~~~ // 實例化有參構造函數 Class<?> aClass = Class.forName("domain.Person"); Constructor<?> constructor = aClass.getConstructor(String.class, Integer.class); Person p = (Person) constructor.newInstance("sn", 11); System.out.println(p.toString());//Person{name='sn', age=11} ~~~ ### Api | 方法名稱 | 作用 | | --- | --- | | getDeclaredMethods | 獲取該類的所有方法 | | getReturnType() | 獲取該類的返回值 | | getParameterTypes() | 獲取傳入參數 | | getDeclaredFields() | 獲取該類的所有字段 | | setAccessible | 允許訪問私有成員 | ### 禁止使用反射機制初始化 ``` 將構造函數私有化 ```
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