Example usage for java.lang Integer toHexString

Introduction

In this page you can find the example usage for java.lang Integer toHexString.

Prototype

public static String toHexString(int i)

Source Link

Document

Returns a string representation of the integer argument as an unsigned integer in base 16.

Usage

From source file:Main.java

public static String getMD5Str(String str) {
    MessageDigest messageDigest = null;
    try {/*from ww w  .  ja v a 2s. co  m*/
        messageDigest = MessageDigest.getInstance("MD5");

        messageDigest.reset();

        messageDigest.update(str.getBytes("UTF-8"));
    } catch (NoSuchAlgorithmException e) {
        System.out.println("NoSuchAlgorithmException caught!");
    } catch (UnsupportedEncodingException e) {
    }

    byte[] byteArray = messageDigest.digest();

    StringBuffer md5StrBuff = new StringBuffer();

    for (int i = 0; i < byteArray.length; i++) {
        if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
            md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
        else
            md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
    }
    return md5StrBuff.substring(0, 24).toString().toUpperCase();
}

From source file:Main.java

public static String toUnicode(String input) {
    StringBuffer ret = new StringBuffer();
    if (input != null) {
        for (int i = 0; i < input.length(); i++) {
            char ch = input.charAt(i);
            if (!Character.isWhitespace(ch) && ch < 0x20 || ch > 0x7e) {
                ret.append("\\u");
                // requires 1.5 VM
                // ret.append(String.format("%1$04x", new Object[] { Integer.valueOf(ch) }));
                ret.append(leading4Zeros(Integer.toHexString(ch)));
            } else {
                ret.append(ch);/*from  w w  w .  j  av  a  2s  .  c  om*/
            }
        }
    }
    return ret.toString();
}

From source file:Main.java

static String md5hash(String key) {
    MessageDigest hash = null;/* w ww  . java 2 s . com*/
    try {
        hash = MessageDigest.getInstance(HASH_ALGORITHM_MD5);
    } catch (NoSuchAlgorithmException e) {
        return null;
    }

    hash.update(key.getBytes());
    byte[] digest = hash.digest();
    StringBuilder builder = new StringBuilder();
    for (int b : digest) {
        builder.append(Integer.toHexString((b >> 4) & 0xf));
        builder.append(Integer.toHexString((b >> 0) & 0xf));
    }
    return builder.toString();
}

From source file:Main.java

public static String toHexString(byte[] value, int startOffset, int maxLength, boolean uppercase,
        char separator) {
    if (maxLength == -1 || startOffset + maxLength > value.length) {
        maxLength = value.length - startOffset;
    }// ww  w  . j a v a2  s .c om
    StringBuffer r = new StringBuffer(maxLength * (separator == -1 ? 2 : 3));
    for (int i = 0; i < maxLength; i++) {
        if (i > 0 && separator != 0) {
            r.append(separator);
        }
        String t = Integer.toHexString(value[i + startOffset] & 0xFF);
        if (t.length() == 1) {
            t = "0" + t;
        }
        if (uppercase) {
            t = t.toUpperCase();
        }
        r.append(t);
    }
    return r.toString();
}

From source file:Main.java

/**
 * Gets the hex string./*from w  w  w.  j av  a  2  s  .  co m*/
 *
 * @param data the data
 * @param offset the offset
 * @param len the len
 * @param delimiter the delimiter
 * @return the hex string
 */
public static String getHexString(byte[] data, int offset, int len, String delimiter) {
    if (data != null) {
        StringBuffer str = new StringBuffer(len);
        for (int i = 0; i < len; i++) {
            if (i != 0 && i % 16 == 0) {
                //         str.append("\n  ");
            }
            String digit = Integer.toHexString((data[i + offset] & 0x00ff));
            if (digit.length() == 1)
                digit = '0' + digit;
            digit = digit.toUpperCase();
            str.append(digit + delimiter);
        }
        return str.toString();
    }
    return "";
}

From source file:Main.java

/**
 * Return a hex string of the contents of buffer.
 * @param buffer The buffer.//from www .  j a  v a2s  .  c om
 * @return A string of hex bytes.
 */
public static String toHex(byte[] buffer) {
    StringBuffer output = new StringBuffer(buffer.length * 2);
    for (int i = 0; i < buffer.length; ++i) {
        String hex = Integer.toHexString((int) buffer[i] & 0xff);
        if (hex.length() <= 1)
            // Append the leading zero.
            output.append("0");
        output.append(hex);
    }

    return output.toString();
}

From source file:Main.java

public static String byteArrayToHexString(final byte[] b) {
    if (b == null || b.length == 0)
        return null;
    final StringBuffer sb = new StringBuffer(b.length * 3 - 1);
    for (final byte element : b) {
        if (sb.length() > 0)
            sb.append(':');
        final int v = element & 0xff;
        if (v < 16)
            sb.append('0');
        sb.append(Integer.toHexString(v));
    }/*w w w  .ja v a2 s . c o  m*/
    return sb.toString().toUpperCase(Locale.US);
}

From source file:Main.java

public static String generateMD5(String value) {
    try {/*ww  w.j a  va 2  s.c  o  m*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] bytes;
        try {
            bytes = value.getBytes("UTF-8");
        } catch (UnsupportedEncodingException e1) {
            bytes = value.getBytes();
        }
        StringBuilder result = new StringBuilder();
        for (byte b : md.digest(bytes)) {
            result.append(Integer.toHexString((b & 0xf0) >>> 4));
            result.append(Integer.toHexString(b & 0x0f));
        }
        return result.toString();
    } catch (NoSuchAlgorithmException ex) {
        throw new RuntimeException(ex);
    }
}

From source file:Main.java

private static String getLockInfo(ReentrantReadWriteLock lock) {
    String lockid = "RWLock@" + Integer.toHexString(lock.hashCode());
    return lockid + " readLockCount=" + lock.getReadLockCount() + " isWriteLocked=" + lock.isWriteLocked();
}

From source file:Main.java

final static String encode(String s) throws UnsupportedEncodingException {
    byte buf[] = s.getBytes("utf-8");
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < buf.length; i++) {
        int cur = (buf[i] & 0xff);
        if (isReserved(cur)) {
            sb.append("%");
            if (cur < 0x10) {
                sb.append("0");
            }/*  w  w w .j a  v a 2  s.com*/
            sb.append(Integer.toHexString(cur).toUpperCase());
        } else {
            sb.append((char) (cur));
        }
    }
    return sb.toString();
}