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Showing content from https://www.tutorialspoint.com/java/lang/system_maplibraryname.htm below:

Java System mapLibraryName() Method

The Java System mapLibraryName() method maps a library name into a platform-specific string representing a native library.

Following is the declaration for java.lang.System.mapLibraryName() method

public static String mapLibraryName(String libname)

libname − This is the name of the library.

This method returns a platform-dependent native library name.

NullPointerException − if libname is null

The following example shows the usage of Java System mapLibraryName() method. In this program, we've retrieved Operating System name using "os.name" key and then using mapLibraryName(), corresponding mapped library is printed.

package com.tutorialspoint;

public class SystemDemo {

   public static void main(String[] args) {

      // prints the name of the Operating System
      System.out.println(System.getProperty("os.name"));

      /* maps a library name into a platform-specific string representing
         a native library */
      String str = System.mapLibraryName("os.name");   
      System.out.println(str);
   }
} 

Let us compile and run the above program, this will produce the following result −

Windows 11
os.name.dll

The following example shows the usage of Java System mapLibraryName() method. In this program, we've retrieved user directory name using "user.dir" key and then using mapLibraryName(), corresponding mapped library is printed.

package com.tutorialspoint;

public class SystemDemo {

   public static void main(String[] args) {

      // prints the name of the User Directory
      System.out.println(System.getProperty("user.dir"));

      /* maps a library name into a platform-specific string representing
         a native library */
      String str = System.mapLibraryName("user.dir");   
      System.out.println(str);
   }
} 

Let us compile and run the above program, this will produce the following result −

C:\Users\Tutorialspoint\eclipse-workspace\Tutorialspoint
user.dir.dll

The following example shows the usage of Java System mapLibraryName() method. In this program, we've retrieved user directory name using "java.runtime.version" key and then using mapLibraryName(), corresponding mapped library is printed.

package com.tutorialspoint;

public class SystemDemo {

   public static void main(String[] args) {

      // prints the name of the User Directory
      System.out.println(System.getProperty("java.runtime.version"));

      /* maps a library name into a platform-specific string representing
         a native library */
      String str = System.mapLibraryName("java.runtime.version");   
      System.out.println(str);
   }
} 

Let us compile and run the above program, this will produce the following result −

21.0.2+13-LTS-58
java.runtime.version.dll

java_lang_system.htm

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