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Dear han luoxing,
Thank you for trying YourKit Java Profiler.
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// Hash an input string and return the hash as
// a 32 character hexadecimal string.
static string getMd5Hash(string input)
{
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Properties p = new Properties();
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package com.joe;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test
{
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public static void main(String[] args)
{
String str = "iu7i8hy4j ......