類的類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.

  當此類表示的該類或接口是其他類的一部分或成員時，使用getDeclaringClass()方法返回聲明的Class對象，該對象表示在其中聲明該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()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

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

  返回Class對象時， getDeclaringClass()方法不會引發異常。

Syntax:

句法：

    public Class getDeclaringClass ();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

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

此方法的返回類型為Class ，它從該Class返回一個聲明的class的對象。

Note:

注意：

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

  當該類或接口不是其他類的一部分或成員時，將返回null 。

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

  當此類反映原始類型或void類型或數組類時，將返回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

輸出量

 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

翻譯自: https://www.includehelp.com/java/class-class-getdeclaringclass-method-with-example.aspx