类的类getDeclaringClass()方法 (Class class getDeclaringClass() method)

• getDeclaringClass() method is available in java.lang package.

  getDeclaringClass()方法在java.lang包中可用。

• getDeclaringClass() method is used to return the declared Class object denoting the Class in which it is declared when this class or interface denoted by this Class is a part or member of other class.

  当此类表示的该类或接口是其他类的一部分或成员时，使用getDeclaringClass()方法返回声明的Class对象，该对象表示在其中声明该Class的Class。

• getDeclaringClass() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getDeclaringClass()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• getDeclaringClass() method does not throw an exception at the time of returning Class object.

  返回Class对象时， getDeclaringClass()方法不会引发异常。

Syntax:

句法：

    public Class getDeclaringClass ();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of this method is Class, it returns an object of declared class from this Class.

此方法的返回类型为Class ，它从该Class返回一个声明的class的对象。

Note:

注意：

• When the class or interface is not part or member of other class, null is returned.

  当该类或接口不是其他类的一部分或成员时，将返回null 。

• When this class reflects primitive or void type or an array class, null is returned.

  当此类反映原始类型或void类型或数组类时，将返回null 。

Example:

例：

// Java program to demonstrate the example 
// of Class getDeclaringClass() method of Class 
import java.lang.reflect.*;
public class GetDeclaringClassOfClass {
public static void main(String[] args) {
// It returns the Class object with 
// the given class name
Class cl = Integer.class;
// It returns an array of Methods 
// that denotes the private, protected, public and default 
// Methods of the class Integer
Method[] methods = cl.getMethods();
// Traverse Integer class
for (int i = 0; i < methods.length; ++i) {
Class declare_classes = methods[i].getDeclaringClass();
System.out.print(" Declaring Methods Class: ");
System.out.println(declare_classes.toString());
}
}
}

Output

输出量

 Declaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.IntegerDeclaring Methods Class: class java.lang.ObjectDeclaring Methods Class: class java.lang.ObjectDeclaring Methods Class: class java.lang.ObjectDeclaring Methods Class: class java.lang.ObjectDeclaring Methods Class: class java.lang.ObjectDeclaring Methods Class: class java.lang.Object

翻译自: https://www.includehelp.com/java/class-class-getdeclaringclass-method-with-example.aspx