从Java程序将Unicode字符打印到Windows 7控制台时，为什么还会显示其他字符？

Question

Below is a Java program to print a unicode character to windows console

import java.io.PrintStream;
import java.io.UnsupportedEncodingException;

public class PrintUnicodeChar {
  public static void main (String[] argv) throws UnsupportedEncodingException {
    String unicodeMessage = "\u00A3"; // Pound sign

    PrintStream out = new PrintStream(System.out, true, "UTF-8");
    out.print(unicodeMessage);
  }
}

I have selected Lucida Console as the font and set the codepage to 65001.

The output I get is £

If I print the pound sign three times using "\£\£\£" , the output becomes £££ £. Printing characters with higher unicode value outputs more making it more garbled.

Here is another string "\£\\n\£\£\\n\£\£\£\\n\£\£\£\£\\n\£\£\£\£\£\\n"

The output is

£

££

£££

££££

£££££

£

£££££

££

What is happening? Is it a problem with the Windows 7 terminal? How to prevent the additional characters from printing?

Answer 1

There is nothing wrong with your code.

The problem occurred, because windows does not support UTF-8 in a console property [ similar problem in python: How to display utf-8 in windows console ]

You can bypass this problem by printing to file in the following way:

PrintStream out = new PrintStream(new FileOutputStream(fileDir), true, "UTF8");

Full code:

public static void main(String[] args) throws IOException {
    String unicodeMessage = "\u00A3"; // Pound sign
    File fileDir = new File("c:\\temp\\test.txt");
    PrintStream out = new PrintStream(new FileOutputStream(fileDir), true, "UTF-8");
    out.print(unicodeMessage);
}

Another solution: Run your code in docker on linux vm (in order to avoid windows related issues)