Flip Text - flips a line of text so that it appears to be upside-down and mirrored

flipText.java

/**
 * Copyright 2009 Dennis Ideler
 * 
 * $ javac flipText.java
 * $ java flipText 
 * hello world, i'm dennis
 * sıuuǝp ɯ,ı 'p1ɹoʍ o11ǝɥ
 */

 import java.io.*;

 public class flipText
 {
    flipText()
    {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      String text = "";
      try { text = br.readLine(); }
      catch(Exception e) { e.printStackTrace(); }
      String result = flipString(text);
      System.out.println(result);
    }


    private String flipString(String text)
    {
      text = text.toLowerCase();
      String result = "";

      for (int i = text.length() - 1; i >= 0; --i)
      {
        // Flip and mirror the text.
        result += flipChar(text.charAt(i));
      }

      return result;
    }


    private char flipChar(char c)
    {
      switch (c)
      {
        case 'a': return '\u0250';
        case 'b': return 'q';
        case 'c': return '\u0254';
        case 'd': return 'p';
        case 'e': return '\u01DD';
        case 'f': return '\u025F';
        case 'g': return 'b';
        case 'h': return '\u0265';
        case 'i': return '\u0131'; // or \u0323
        case 'j': return '\u0638';
        case 'k': return '\u029E';
        case 'l': return '1';
        case 'm': return '\u026F';
        case 'n': return 'u';
        case 'o': return 'o';
        case 'p': return 'd';
        case 'q': return 'b';
        case 'r': return '\u0279';
        case 's': return 's';
        case 't': return '\u0287';
        case 'u': return 'n';
        case 'v': return '\u028C';
        case 'w': return '\u028D';
        case 'x': return 'x';
        case 'y': return '\u028E';
        case 'z': return 'z';
        case '[': return ']';
        case ']': return '[';
        case '(': return ')';
        case ')': return '(';
        case '{': return '}';
        case '}': return '{';
        case '?': return '\u00BF';
        case '\u00BF': return '?';
        case '!': return '\u00A1';
        case '\'': return ',';
        case ',': return '\'';
        default: return c;
      }
    }

    public static void main(String[] args) { new flipText(); }
 }

getting error while comile
flipText.java:7: error: unmappable character for encoding Cp1252

• s─▒uu╟?p ╔»,─▒ 'p1╔╣o╩? o11╟?╔Ñ
  ^
  flipText.java:7: error: unmappable character for encoding Cp1252
• s─▒uu╟?p ╔»,─▒ 'p1╔╣o╩? o11╟?╔Ñ
  ^
  flipText.java:7: error: unmappable character for encoding Cp1252
• s─▒uu╟?p ╔»,─▒ 'p1╔╣o╩? o11╟?╔Ñ
  ^
  3 errors

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class FlipText {

    public static void main(String[] args) {
        FlipText flipper = new FlipText();
        flipper.run();
    }

    public void run() {
        try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
            String input;

            System.out.println("Enter text to flip (type 'exit' to quit):");

            while ((input = br.readLine()) != null) {
                if (input.equalsIgnoreCase("exit")) {
                    break;
                }

                String flipped = flipString(input);
                System.out.println("Flipped: " + flipped);
                System.out.println();
            }

        } catch (IOException e) {
            System.err.println("Error reading input:");
            e.printStackTrace();
        }
    }

    private String flipString(String text) {
        text = text.toLowerCase();
        StringBuilder result = new StringBuilder();

        for (int i = text.length() - 1; i >= 0; i--) {
            result.append(flipChar(text.charAt(i)));
        }

        return result.toString();
    }

    private char flipChar(char c) {
        switch (c) {
            case 'a': return '\u0250';
            case 'b': return 'q';
            case 'c': return '\u0254';
            case 'd': return 'p';
            case 'e': return '\u01DD';
            case 'f': return '\u025F';
            case 'g': return 'b';
            case 'h': return '\u0265';
            case 'i': return '\u0131';
            case 'j': return '\u0638';
            case 'k': return '\u029E';
            case 'l': return '1';
            case 'm': return '\u026F';
            case 'n': return 'u';
            case 'o': return 'o';
            case 'p': return 'd';
            case 'q': return 'b';
            case 'r': return '\u0279';
            case 's': return 's';
            case 't': return '\u0287';
            case 'u': return 'n';
            case 'v': return '\u028C';
            case 'w': return '\u028D';
            case 'x': return 'x';
            case 'y': return '\u028E';
            case 'z': return 'z';
            case '[': return ']';
            case ']': return '[';
            case '(': return ')';
            case ')': return '(';
            case '{': return '}';
            case '}': return '{';
            case '?': return '\u00BF';
            case '\u00BF': return '?';
            case '!': return '\u00A1';
            case '\'': return ',';
            case ',': return '\'';
            default: return c;
        }
    }
}