ClassLoader類findLibrary()方法 (ClassLoader Class findLibrary() method)

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

  findLibrary()方法在java.lang包中可用。

• findLibrary() method is used to find the absolute pathname of the given native library.

  findLibrary()方法用于查找給定本機庫的絕對路徑名。

• findLibrary() 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.

  findLibrary()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• findLibrary() method does not throw an exception at the time of returning the absolute path of the given library.

  返回給定庫的絕對路徑時， findLibrary()方法不會引發異常。

Syntax:

句法：

protected String findLibrary(String lib_name);

Parameter(s):

參數：

• String lib_name – represents the name of the library.

  字符串lib_name –代表庫的名稱。

Return value:

返回值：

The return type of this method is String, it returns an absolute path of the given library.

該方法的返回類型為String ，它返回給定庫的絕對路徑。

Note: It returns null when JVM finds the library along the path given as the system property "java.library.path"

注意：當JVM沿著系統屬性“ java.library.path”給出的路徑找到庫時，它將返回null。

Example:

例：

// Java program to demonstrate the example // of String findLibrary(String lib_name) method of ClassLoader class FindLibrary extends ClassLoader {// Override findLibrary() of ClassLoaderprotected String findLibrary(String lib_name) {if (lib_name.equals("java.lang")) {}return lib_name;} }public class Main {public static void main(String[] args) throws Exception {// Creating an instance of FindLibraryFindLibrary fl = new FindLibrary();// we are finding the library java.lang and it returns// it already exists in JavaString library = fl.findLibrary("java.lang");System.out.println("Library Found: " + library);} }

Output

輸出量

Library Found: java.lang

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

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