Example usage for java.lang Object hashCode

Introduction

In this page you can find the example usage for java.lang Object hashCode.

Prototype

@HotSpotIntrinsicCandidate
public native int hashCode();

Source Link

Document

Returns a hash code value for the object.

Usage

From source file:Main.java

/**
 * <p>Return an object's hash code or 0 if the object is <code>null</code>.</p>
 *//*from w ww.j  a  v  a2s .  c  o  m*/
public static int hashIt(Object o) {
    if (o == null)
        return 0;
    else
        return o.hashCode();
}

From source file:org.linqs.psl.util.HashCode.java

public static int build(int start, int multiplier, Object obj) {
    return start * multiplier + obj.hashCode();
}

From source file:Main.java

public static <T1, T2> void removeHashMapElementByHash(ConcurrentHashMap<T1, T2> target, int hashcode) {
    Iterator<T1> iter = target.keySet().iterator();
    Object key = null;
    while (iter.hasNext()) {
        key = iter.next();/*from ww w .  j  a va2 s .  c  o  m*/
        if (key.hashCode() == hashcode) {
            target.remove(key);
        }
    }
}

From source file:Main.java

public static <T1, T2> T2 getHashMapElementByHash(ConcurrentHashMap<T1, T2> target, int hashcode) {
    Iterator<T1> iter = target.keySet().iterator();
    Object key = null;
    while (iter.hasNext()) {
        key = iter.next();//from www.ja  va  2s. c  o  m
        if (key.hashCode() == hashcode) {
            return target.get(key);
        }
    }
    return null;
}

From source file:Main.java

/**
 * return unified reference.//from  w  ww. j a va2 s .c om
 *
 * @param hash
 *            the hash
 * @param object
 *            the object
 * @return the object
 */
public static Object unifyReferences(final Hashtable hash, Object object) {
    final Object itemAtHash = hash.get(object.hashCode());
    if (itemAtHash == null) {
        hash.put(object.hashCode(), object);
    } else {
        object = itemAtHash;
    }
    return object;
}

From source file:Main.java

public static int hashCode(List list) {
    if (list == null) {
        return 0;
    }/*from  w w  w.  jav a 2s .c om*/

    final int prime = 31;
    int result = 1;
    for (Iterator it = list.iterator(); it.hasNext();) {
        Object next = it.next();
        result = prime * result + ((next == null) ? 0 : next.hashCode());
    }
    return result;
}

From source file:Main.java

public static int getHashCode(final Object... pObjects) {
    final int prime = 31;
    int result = 1;

    for (int i = 0; i < pObjects.length; i++) {
        final Object object = pObjects[i];
        result = prime * result + ((object == null) ? 0 : object.hashCode());
    }//from  ww  w  .jav  a 2  s. co  m

    return result;
}

From source file:Main.java

/**
 * Returns a hashcode that is computed irrespective of the order of the collection.  This method should be used
 * to compute a hashcode of a collection field when <code>unorderedListEquals</code> or
 * <code>unorderedCollectionEquals</code> is used for that field in the object's equals method. 
 * /*from   ww w. ja v  a 2s .c  o  m*/
 * @param c the <code>Collection</code>
 * @return the hashcode
 */
public static int unorderedCollectionHashCode(Collection<?> c) {
    if (c == null)
        return 0;

    int h = 0;
    Iterator<?> i = c.iterator();
    while (i.hasNext()) {
        Object o = i.next();
        if (o != null)
            h += o.hashCode();
    }
    return h;
}

From source file:Main.java

public static String toHexString(Object object) {
    if (object == null) {
        return null;
    }/*from  www  .j a va  2 s  .  co  m*/

    return Integer.toHexString(object.hashCode());
}

From source file:com.googlecode.psiprobe.controllers.threads.ListThreadsController.java

private static String toUID(Object o) {
    return o.getClass().getName() + "@" + o.hashCode();
}