Java中的方法类| getName（）方法-yiteyi-C++库

这个 getName（） 方法 JAVA朗，反思 .Method类有助于以字符串形式获取方法的名称。要获取一个类的所有方法的名称，请获取该类对象的所有方法。然后对这些方法对象调用getName（）。

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语法：

public String getName()

返回值： 它以字符串形式返回方法的名称。

例子：

Method:public void getValue(){}
getName() returns: getValue
Explanation: The getName() function on object of above method returns name of method
which is getValue.

Method:public void paint(){}
getName() returns: paint

下面的程序演示了method类的getName（）方法：

例1： 打印方法对象的所有方法的名称。

                     /*                   
                     * Program Demonstrate how to apply getName() method                   
                     * of Method Class.                   
                     */                   
                     import                               java.lang.reflect.Method;                   
                             
                     public                               class                               GFG {                   
                             
                                         // Main method                   
                                         public                               static                               void                               main(String[] args)                   
                                         {                   
                             
                                         try                               {                   
                                         // create class object                   
                                         Class classobj = GFG.                               class                               ;                   
                             
                                         // get list of methods                   
                                         Method[] methods = classobj.getMethods();                   
                             
                                         // get the name of every method present in the list                   
                                         for                               (Method method : methods) {                   
                             
                                         String MethodName = method.getName();                   
                                         System.out.println(                               "Name of the method: "                   
                                         + MethodName);                   
                                         }                   
                                         }                   
                                         catch                               (Exception e) {                   
                                         e.printStackTrace();                   
                                         }                   
                                         }                   
                             
                                         // method name setValue                   
                                         public                               static                               int                               setValue()                   
                                         {                   
                                         System.out.println(                               "setValue"                               );                   
                                         return                               24                               ;                   
                                         }                   
                             
                                         // method name getValue                   
                                         public                               String getValue()                   
                                         {                   
                                         System.out.println(                               "getValue"                               );                   
                                         return                               "getValue"                               ;                   
                                         }                   
                             
                                         // method name setManyValues                   
                                         public                               void                               setManyValues()                   
                                         {                   
                                         System.out.println(                               "setManyValues"                               );                   
                                         }                   
                     }                   

输出：

Name of the method: main
Name of the method: getValue
Name of the method: setValue
Name of the method: setManyValues
Name of the method: wait
Name of the method: wait
Name of the method: wait
Name of the method: equals
Name of the method: toString
Name of the method: hashCode
Name of the method: getClass
Name of the method: notify
Name of the method: notifyAll

例2： 用于检查类是否包含特定方法的程序。

                     /*                   
                     * Program Demonstrate how to apply getName() method                   
                     * of Method Class within a class                   
                     */                   
                     import                               java.lang.reflect.Method;                   
                             
                     public                               class                               GFG {                   
                             
                                         // Main method                   
                                         public                               static                               void                               main(String[] args)                   
                                         {                   
                             
                                         String checkMethod =                               "method1"                               ;                   
                             
                                         try                               {                   
                                         // create class object                   
                                         Class classobj = democlass.                               class                               ;                   
                             
                                         // get list of methods                   
                                         Method[] methods = classobj.getMethods();                   
                             
                                         // get the name of every method present in the list                   
                                         for                               (Method method : methods) {                   
                             
                                         String MethodName = method.getName();                   
                                         if                               (MethodName.equals(checkMethod)) {                   
                                         System.out.println(                               "Class Object Contains"                   
                                         +                               " Method whose name is "                   
                                         + MethodName);                   
                                         }                   
                                         }                   
                                         }                   
                                         catch                               (Exception e) {                   
                                         e.printStackTrace();                   
                                         }                   
                                         }                   
                     }                   
                     // a simple class                   
                     class                               democlass {                   
                             
                                         public                               int                               method1()                   
                                         {                   
                                         return                               24                               ;                   
                                         }                   
                             
                                         public                               String method2()                   
                                         {                   
                                         return                               "Happy hours"                               ;                   
                                         }                   
                             
                                         public                               void                               method3()                   
                                         {                   
                                         System.out.println(                               "Happy hours"                               );                   
                                         }                   
                     }                   

输出：

Class Object Contains Method whose name is method1

参考： https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html#getName–

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