Example usage for java.util.zip Checksum getValue

Introduction

In this page you can find the example usage for java.util.zip Checksum getValue.

Prototype

public long getValue();

Source Link

Document

Returns the current checksum value.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] bytes = "some data".getBytes();

    Checksum checksumEngine = new Adler32();
    checksumEngine.update(bytes, 0, bytes.length);
    long checksum = checksumEngine.getValue();
    System.out.println(checksum);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] bytes = "some data".getBytes();

    // Compute Adler-32 checksum
    Checksum checksumEngine = new CRC32();
    checksumEngine.update(bytes, 0, bytes.length);
    long checksum = checksumEngine.getValue();

    checksumEngine.reset();//from  w w  w . j  av  a2s .  c  o m
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    FileInputStream fin = new FileInputStream("a.zip");
    Checksum cs = new CRC32();
    for (int b = fin.read(); b != -1; b = fin.read()) {
        cs.update(b);//  www  . j a  v  a 2s  .c  o m
    }
    System.out.println(cs.getValue());
    fin.close();
}

From source file:Main.java

public static long getCRC32(InputStream in) throws IOException {
    Checksum cs = new CRC32();

    for (int b = in.read(); b != -1; b = in.read()) {
        cs.update(b);//from  w w w  .j av  a  2s. co m
    }
    return cs.getValue();
}

From source file:Main.java

public static long doChecksum(String text) throws UnsupportedEncodingException {
    byte bytes[] = text.getBytes("UTF-8"); // This makes this hash function platform independent
    Checksum checksum = new CRC32();
    checksum.update(bytes, 0, bytes.length);
    long lngChecksum = checksum.getValue();
    return lngChecksum;
}

From source file:ChecksumCalculator.java

public static long compute(byte[] data, int start, int length) {
    Checksum checksum = new Adler32();
    checksum.update(data, start, length);
    return checksum.getValue();
}

From source file:MainClass.java

public static long getCRC32(InputStream in) throws IOException {

    Checksum cs = new CRC32();

    // more efficient to read chunks of data at a time
    for (int b = in.read(); b != -1; b = in.read()) {
        cs.update(b);//ww  w .j  a  v  a2 s  . c om
    }
    return cs.getValue();
}

From source file:net.sourceforge.jaulp.file.checksum.ChecksumUtils.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes//from w w w. jav a 2s .co m
 *            The byte array.
 * @return The checksum from the byte array as long. {@link java.util.zip.CRC32} object.
 */
public static long getCheckSumCRC32(byte[] bytes) {
    Checksum checksum = new CRC32();
    checksum.update(bytes, 0, bytes.length);
    long cs = checksum.getValue();
    return cs;
}

From source file:net.sourceforge.jaulp.file.checksum.ChecksumUtils.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes/*  w  w w.j  a v  a2  s  .  c o m*/
 *            The byte array.
 * @return The checksum from the byte array as long. {@link java.util.zip.Adler32} object.
 */
public static long getCheckSumAdler32(byte[] bytes) {
    Checksum checksum = new Adler32();
    checksum.update(bytes, 0, bytes.length);
    long cs = checksum.getValue();
    return cs;
}

From source file:com.nridge.core.base.std.FilUtl.java

/**
 * Generates a unique path based on the parameters provided.
 *
 * @param aPathName Optional path name - if not provided, then the current working directory will be used.
 * @param aPrefix Path name prefix (appended with random id)
 *
 * @return A unique path name.//  w  w  w.  j a va 2 s .c  o  m
 */
static public String generateUniquePathName(String aPathName, String aPrefix) {
    if (StringUtils.isEmpty(aPathName))
        aPathName = getWorkingDirectory();
    if (StringUtils.isEmpty(aPathName))
        aPrefix = "subpath";

    // http://www.javapractices.com/topic/TopicAction.do?Id=56

    UUID uniqueId = UUID.randomUUID();
    byte idBytes[] = uniqueId.toString().getBytes();
    Checksum checksumValue = new CRC32();
    checksumValue.update(idBytes, 0, idBytes.length);
    long longValue = checksumValue.getValue();

    return String.format("%s%c%s_%d", aPathName, File.separatorChar, aPrefix, longValue);
}