Java Properties File Debug Helper

PropertiesFileDebugHelper.java

package raju.javautil;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Random;

public final class PropertiesFileDebugHelper
{
	public static void main(String[] args) throws IOException
	{
		System.out.printf("1. Helpful in escaping special characters in key, values in properties file."
				+ "%n2. Converters UTF-8 text to Properties file compatible ISO-8859-1 text"
				+ "%n3. Prints the Key Value pairs, if properties file(s) are provided"
				+ "%n%n");

		Properties props = new Properties();
		for (String propsFilePath : args)
		{
			props.clear();
			InputStream is = new FileInputStream(propsFilePath);
			try
			{
				props.load(is);
				System.out.println("File: " + propsFilePath);
				for (Entry<Object, Object> entry : props.entrySet())
					System.out.printf("%s=%s%n", entry.getKey(), entry.getValue());
				System.out.println();
			}
			finally
			{
				is.close();
			}
		}
		if (args.length != 0)
			return;

		demo();

		String key, value;
		ByteArrayOutputStream baos = new ByteArrayOutputStream();

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in, Charset.forName("UTF-8")));
		for (;;)
		{
			key = readInput(br, "Key: ");
			if (key == null)
				break;
			value = readInput(br, "Value: ");
			if (value == null)
				break;
			props.clear();
			props.setProperty(key, value);
			baos.reset();
			props.store(baos, null);
			System.out.println(withoutComment(toUtf8(baos.toByteArray())));
		}
	}

	private static void demo() throws IOException
	{
		System.out.printf("Usage%nKey: ");

		String key = "X:y=2@", value = "23##@3", comment = "# In properties file you may write like this%n";
		printSlowly(key, 200);
		System.out.printf("Value: ");
		printSlowly(value, 200);
		System.out.println();

		ByteArrayOutputStream baos = new ByteArrayOutputStream();

		Properties props = new Properties();
		props.put(key, value);
		props.store(baos, null);
		System.out.printf(comment);
		System.out.println(withoutComment(toUtf8(baos.toByteArray())));

		System.out.printf("Continue... 'Ctrl + c' to exit%n%n");
	}

	private static void printSlowly(String str, int gapBetwenChars)
	{
		Random random = new Random();
		for (int i = 0; i < str.length(); i++)
		{
			System.out.print(str.charAt(i));
			sleep(50 + random.nextInt(201));
		}
		System.out.println();
	}

	private static void sleep(int millis)
	{
		try
		{
			Thread.sleep(millis);
		}
		catch (InterruptedException e)
		{
			e.printStackTrace();
		}
	}

	private static String withoutComment(String str)
	{
		return str.substring(str.indexOf('\n') + 1);
	}

	private static String readInput(BufferedReader br, String inputMsg) throws IOException
	{
		System.out.printf(inputMsg);
		return br.readLine();
	}

	private static String toUtf8(byte[] bytes) throws UnsupportedEncodingException
	{
		return new String(bytes, "UTF-8");
	}
}

Executable jar file can be found at: https://sites.google.com/site/rajuutils/javautils
File name: properties-file-debug-helper-<version>.jar
Requires Java 1.5

I have used babun as it supports UTF-8 text (command line):

{ MyApps }  » java -jar properties-file-debug-helper-0.4.jar                                           /cygdrive/d/MyApps
1. Helpful in escaping special characters in key, values in properties file.
2. Converters UTF-8 text to Properties file compatible ISO-8859-1 text
3. Prints the Key Value pairs, if properties file(s) are provided

Usage
Key: X:y=2@
Value: 23##@3

# In properties file you may write like this
X\:y\=2@=23\#\#@3

Continue... 'Ctrl + c' to exit

Key: This Key has chars to be escaped : \
Value: Contains UTF-8 text 禮記‧喪服小記》第一則少「箭笄終喪三年」and chars to be escaped : '
This\ Key\ has\ chars\ to\ be\ escaped\ \:\ \\=Contains UTF-8 text \u79AE\u8A18\u2027\u55AA\u670D\u5C0F\u8A18\u300B\u7B2C\u4E00\u5247\u5C11\u300C\u7BAD\u7B04\u7D42\u55AA\u4E09\u5E74\u300Dand chars to be escaped \: '

Key:

{ MyApps }  » java -jar properties-file-debug-helper-0.4.jar D:/MyApps/test.properties
1. Helpful in escaping special characters in key, values in properties file.
2. Converters UTF-8 text to Properties file compatible ISO-8859-1 text
3. Prints the Key Value pairs, if properties file(s) are provided

File: D:/MyApps/test.properties
Key1=Value1
Key2=Value2