方法类 | Java中的 getName() 方法

Java.lang.reflect.Method 类的getName()方法有助于获取方法的名称，作为字符串。要获取类的所有方法的名称，请获取该类对象的所有方法。然后在这些方法对象上调用 getName()。

句法：

public String getName()

返回值：它返回方法的名称，作为字符串。

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

下面的程序说明了 Method 类的 getName() 方法：

示例 1：打印 Method Object 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

示例 2：检查类是否包含某个特定方法的程序。

/*
* 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 Java