Java Method類 getName()用法及代碼示例

java.lang.reflect.Method類的getName()方法有助於以String的形式獲取方法的名稱。要獲取類的所有方法的名稱，請獲取該類對象的所有方法。然後在這些方法對象上調用getName()。

用法:

public String getName()

返回值：它以String形式返回方法的名稱。

例：

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

以下示例程序旨在說明Method類的getName()方法：

範例1：打印方法對象的所有方法的名稱。

/* 
* 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"); 
    } 
}

輸出：

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

範例2：用於檢查類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"); 
    } 
}

輸出：

Class Object Contains Method whose name is method1

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

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注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 Method Class | getName() Method in Java。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。