ClassLoader类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()方法用于查找给定本机库的绝对路径名。

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

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

  返回给定库的绝对路径时， findLibrary()方法不会引发异常。

Syntax:

句法：

    protected String findLibrary(String lib_name);

Parameter(s):

参数：

• String lib_name – represents the name of the library.

  字符串lib_name –代表库的名称。

Return value:

返回值：

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

该方法的返回类型为String ，它返回给定库的绝对路径。

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

注意：当JVM沿着系统属性“ java.library.path”给出的路径找到库时，它将返回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 ClassLoader
protected 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 FindLibrary
FindLibrary fl = new FindLibrary();
// we are finding the library java.lang and it returns
// it already exists in Java
String library = fl.findLibrary("java.lang");
System.out.println("Library Found: " + library);
}
}

Output

输出量

Library Found: java.lang

翻译自: https://www.includehelp.com/java/classloader-findlibrary-method-with-example.aspx