Example usage for java.lang Integer toHexString

List of usage examples for java.lang Integer toHexString

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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:com.gwtcx.server.util.Security.java

public static String byteToHexChars(final int i) {
    final String s = "0" + Integer.toHexString(i);
    return s.substring(s.length() - 2);
}

From source file:com.github.jinahya.codec.HexDecoderTest.java

@Test
public static void testDecodeSingle() {

    final byte[] input = new byte[2];
    for (int i = 0; i < 256; i++) {
        final String hex = Integer.toHexString(i);
        if (hex.length() == 1) {
            input[0] = (byte) '0';
            input[1] = (byte) hex.charAt(0);
        } else {/* ww  w .j a v  a  2  s.  c  o m*/
            input[0] = (byte) hex.charAt(0);
            input[1] = (byte) hex.charAt(1);
        }
        final int decoded = HexDecoder.decodeSingle(input, 0);
        Assert.assertEquals(decoded, i);
    }
}

From source file:Main.java

public static String getMD5String(String str) {
    MessageDigest messageDigest = null;
    try {/*ww  w. j  a v  a 2 s.co m*/
        messageDigest = MessageDigest.getInstance("MD5");
        messageDigest.reset();
        messageDigest.update(str.getBytes("UTF-8"));
    } catch (Exception e) {
        return null;
    }

    byte[] byteArray = messageDigest.digest();
    StringBuffer md5StrBuff = new StringBuffer();
    for (byte b : byteArray) {
        if ((0xFF & b) < 0x10)
            md5StrBuff.append("0");
        md5StrBuff.append(Integer.toHexString(0xFF & b));
    }
    return md5StrBuff.toString();
}

From source file:Main.java

/**
 * Encode a string so that it can be safely used as attribute value in
 * XML output.//from   w w  w  . j a va2  s .  c  o  m
 * @param attribute the attribute value to be encoded.
 * @return a string representing the attribute value that can be safely
 *         used in XML output.
 */
public static String attributeEscape(String attribute) {
    final StringBuffer sb = new StringBuffer();
    if (attribute != null) {
        char c;
        final int l = attribute.length();
        for (int i = 0; i < l; i++) {
            c = attribute.charAt(i);
            switch (c) {
            case '<':
                sb.append("&lt;");
                break;
            case '>':
                sb.append("&gt;");
                break;
            case '\'':
                sb.append("&apos;");
                break;
            case '"':
                sb.append("&quot;");
                break;
            case '&':
                sb.append("&amp;");
                break;
            default:
                if (c > Byte.MAX_VALUE || Character.isISOControl(c)) {
                    sb.append("&#x");
                    sb.append(Integer.toHexString(c));
                    sb.append(';');
                } else {
                    sb.append(c);
                }
            }
        }
    }
    return sb.toString();
}

From source file:Main.java

public static String md5(String string) {
    byte[] hash = null;
    try {//w ww .j  a va  2 s .c om
        hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    StringBuilder hex = new StringBuilder(hash.length * 2);
    for (byte b : hash) {
        if ((b & 0xFF) < 0x10)
            hex.append("0");
        hex.append(Integer.toHexString(b & 0xFF));
    }
    return hex.toString();
}

From source file:com.sammyun.util.MD5.java

/**
 * @param str/*ww  w.  j  ava  2 s.  c  om*/
 * @return
 * @throws NoSuchAlgorithmException
 */
public static String crypt(String str) throws NoSuchAlgorithmException {
    if (str == null || str.length() == 0) {
        throw new IllegalArgumentException("String to encript cannot be null or zero length");
    }

    StringBuffer hexString = new StringBuffer();

    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update(str.getBytes());
    byte[] hash = md.digest();

    for (byte aHash : hash) {
        if ((OXFF & aHash) < OX10) {
            hexString.append("0").append(Integer.toHexString((OXFF & aHash)));
        } else {
            hexString.append(Integer.toHexString(OXFF & aHash));
        }
    }

    return hexString.toString();
}

From source file:AddSHA1.java

public static String bytetoString(byte[] digest) {
    String str = "";
    String tempStr = "";

    for (int i = 1; i < digest.length; i++) {
        tempStr = (Integer.toHexString(digest[i] & 0xff));
        if (tempStr.length() == 1) {
            str = str + "0" + tempStr;
        } else {/*from  www. j  av a 2 s  .c om*/
            str = str + tempStr;
        }
    }
    return str.toLowerCase();
}

From source file:Main.java

public static String md5_32(String plainText) {
    String re_md5 = new String();
    try {/*w  w w .  j a  va2s. co m*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(plainText.getBytes());
        byte b[] = md.digest();

        int i;

        StringBuffer buf = new StringBuffer("");
        for (int offset = 0; offset < b.length; offset++) {
            i = b[offset];
            if (i < 0)
                i += 256;
            if (i < 16)
                buf.append("0");
            buf.append(Integer.toHexString(i));
        }

        re_md5 = buf.toString();

    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return re_md5;
}

From source file:Main.java

/**
 * Returns the contrast ratio between {@code foreground} and {@code background}.
 * {@code background} must be opaque.//from www .  j a v a2 s . com
 * <p>
 * Formula defined
 * <a href="http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef">here</a>.
 */
public static double calculateContrast(int foreground, int background) {
    if (Color.alpha(background) != 255) {
        throw new IllegalArgumentException(
                "background can not be translucent: #" + Integer.toHexString(background));
    }
    if (Color.alpha(foreground) < 255) {
        // If the foreground is translucent, composite the foreground over the background
        foreground = compositeColors(foreground, background);
    }

    final double luminance1 = calculateLuminance(foreground) + 0.05;
    final double luminance2 = calculateLuminance(background) + 0.05;

    // Now return the lighter luminance divided by the darker luminance
    return Math.max(luminance1, luminance2) / Math.min(luminance1, luminance2);
}

From source file:Main.java

/**
 * Converts the raw characters to XML escape characters.
 * /*from   ww  w.  j  a  va2s.co m*/
 * @param rawContent
 * @param charset Null when charset is not known, so we assume it's unicode
 * @param isNoLines
 * @return escape string
 */
public static String escapeXML(String rawContent, String charset, boolean isNoLines) {
    if (rawContent == null)
        return ""; //$NON-NLS-1$
    else {
        StringBuffer sb = new StringBuffer();

        for (int i = 0; i < rawContent.length(); i++) {
            char ch = rawContent.charAt(i);
            if (ch == '\'')
                sb.append("&#39;"); //$NON-NLS-1$
            else if (ch == '&')
                sb.append("&amp;"); //$NON-NLS-1$
            else if (ch == '"')
                sb.append("&quot;"); //$NON-NLS-1$
            else if (ch == '<')
                sb.append("&lt;"); //$NON-NLS-1$
            else if (ch == '>')
                sb.append("&gt;"); //$NON-NLS-1$
            else if (ch > '~' && charset != null && charSetImpliesAscii(charset))
                // TODO - why is hashcode the only way to get the unicode number for the character
                // in jre 5.0?
                sb.append("&#x" + Integer.toHexString(new Character(ch).hashCode()).toUpperCase() + ";"); //$NON-NLS-1$ //$NON-NLS-2$
            else if (isNoLines) {
                if (ch == '\r')
                    sb.append("&#xA;"); //$NON-NLS-1$
                else if (ch != '\n')
                    sb.append(ch);
            } else
                sb.append(ch);
        }
        return sb.toString();
    }
}