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(dāng)此類表示的該類或接口是其他類的一部分或成員時(shí)，使用getDeclaringClass()方法返回聲明的Class對(duì)象，該對(duì)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(gè)非靜態(tài)方法，只能通過類對(duì)象訪問，如果嘗試使用類名訪問該方法，則會(huì)收到錯(cuò)誤消息。

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

  返回Class對(duì)象時(shí)， getDeclaringClass()方法不會(huì)引發(fā)異常。

Syntax:

句法：

public Class getDeclaringClass ();

Parameter(s):

參數(shù)：

• It does not accept any parameter.

  它不接受任何參數(shù)。

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(gè)聲明的class的對(duì)象。

Note:

注意：

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

  當(dāng)該類或接口不是其他類的一部分或成員時(shí)，將返回null 。

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

  當(dāng)此類反映原始類型或void類型或數(shù)組類時(shí)，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 nameClass cl = Integer.class;// It returns an array of Methods // that denotes the private, protected, public and default // Methods of the class IntegerMethod[] methods = cl.getMethods();// Traverse Integer classfor (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

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