javac - Using CP1252 to Process Source File

Java Tools Tutorials - Herong's Tutorial Examples

∟native2ascii - Native-to-ASCII Encoding Converter

∟javac - Using CP1252 to Process Source File

This section provides a tutorial example showing how 'javac' processing Java source code files with CP1252 encoding.

In order to test the "native2ascii" tool, I wrote the following Java source code file: HelloUtf8.java

/* HelloUtf8.java
 * Copyright (c) 2005 HerongYang.com. All Rights Reserved.
 */
public class HelloUtf8 {
   public static void main(String[] a) {
      System.out.println("Hello world!");
      System.out.println("世界你好！");
   }
}

"HelloUtf8.java" contains a string of Chinese characters written in UTF-8 encoding. When I tried to compile it, I got the following warning:

herong> javac HelloUtf8.java

HelloUtf8.java:7: error: unmappable character (0x81) for encoding
   windows-1252
      System.out.println("##############?");
                                        ^
1 error

The compiler used "Cp1252" as the default encoding to process the source file, HelloUtf8.java. It reported Chinese characters in UTF-8 encoding as invalid characters.