ANSI-colored prompt in Java.

Ansi.java

/**
 * Based on Santhosh Kumar T ANSI library distributed under GPL
 * 
 * Original copyright (C) 2009  Santhosh Kumar T 
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 */
public class Ansi {
    
    public enum Attribute {
        NORMAL(0),
        BRIGHT(1),
        DIM(2),
        UNDERLINE(4),
        BLINK(5),
        REVERSE(7),
        HIDDEN(8);
        
        private String value;
        
        private Attribute(int value) {
            this.value = String.valueOf(value);
        }
        public String toString() {
            return "" + value;
        }
    }

    public enum Color {BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE}

    private static final String PREFIX = "\u001b["; //NOI18N
    private static final String SUFFIX = "m";
    private static final String SEPARATOR = ";";
    private static final String END = PREFIX + SUFFIX;

    
    public static String format(String text, Color foreground) {
    	return format(text, null, foreground, null);
    }
    
    public static String format(String text, Color foreground, Color background) {
    	return format(text, null, foreground, background);
    }
    
    public static String format(String text, Attribute attr, Color foreground, Color background) {  
        StringBuilder buff = new StringBuilder();
        
        if (attr != null) {
            buff.append(attr);
        }
        
        if (foreground != null) {
            if (buff.length() > 0) { 
                buff.append(SEPARATOR);
            }
            buff.append(30 + foreground.ordinal());
        }
        
        if (background != null) {
            if (buff.length() > 0) {
                buff.append(SEPARATOR);
            }
            buff.append(40 + background.ordinal());
        }
        
        buff.insert(0, PREFIX);
        buff.append(SUFFIX);
        buff.append(text);
        buff.append(END);
        return buff.toString();
    }
}