ClassLoader類findClass()方法 (ClassLoader Class findClass() method)

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

  findClass()方法在java.lang包中可用。

• findClass() method is used to find the class with the given binary class name.

  findClass()方法用于查找具有給定二進(jìn)制類名稱的類。

• findClass() 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.

  findClass()方法是一個(gè)非靜態(tài)方法，只能通過類對(duì)象訪問，如果嘗試使用類名稱訪問該方法，則會(huì)收到錯(cuò)誤消息。

• findClass() method may throw an exception at the time of finding the class.

  findClass()方法在查找類時(shí)可能會(huì)引發(fā)異常。

  ClassNotFoundException: This exception may throw when the given class does not exist.

  ClassNotFoundException ：如果給定的類不存在，則可能引發(fā)此異常。

Syntax:

句法：

protected Class findClass(String class_name);

Parameter(s):

參數(shù)：

• String class_name – represents the binary name of the class.

  字符串class_name –表示類的二進(jìn)制名稱。

Return value:

返回值：

The return type of this method is Class, it returns an object "Class".

該方法的返回類型為Class ，它返回一個(gè)對(duì)象“ Class”。

Example:

例：

// Java program to demonstrate the example // of Class findClass(String class_name) method of ClassLoader class FindClass extends ClassLoader {// Override findClass() of ClassLoaderprotected Class findClass(String name) throws ClassNotFoundException {if (name.equals("java.lang.String")) {}return getSystemClassLoader().loadClass(name);} }public class Main {public static void main(String[] args) throws Exception {// Creating an instance of FindClassFindClass fc = new FindClass();// we are finding the class java.lang.String and it returns// it already exists in JavaClass cl = fc.findClass("java.lang.String");System.out.println("Class Found: " + cl.getName());} }

Output

輸出量

Class Found: java.lang.String

翻譯自: https://www.includehelp.com/java/classloader-findclass-method-with-example.aspx

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