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

public static int hashCode(Object paramObject) {
    int i = 1;/*ww  w  .  j  av  a 2s.  c  om*/
    Field[] arrayOfField = paramObject.getClass().getDeclaredFields();
    int j = arrayOfField.length;
    for (int k = 0;; k++) {
        int m;
        int i1;
        if (k < j) {
            Field localField = arrayOfField[k];
            localField.setAccessible(true);
            try {
                Object localObject = localField.get(paramObject);
                m = i * 31;
                if (localObject == null) {
                    i1 = 0;
                } else {
                    int n = localObject.hashCode();
                    i1 = n;
                }
            } catch (IllegalArgumentException localIllegalArgumentException) {
                localIllegalArgumentException.printStackTrace();
                continue;
            } catch (IllegalAccessException localIllegalAccessException) {
                localIllegalAccessException.printStackTrace();
                continue;
            }
        } else {
            return i;
        }
        i = m + i1;
    }
}

From source file:org.hyperic.hq.plugin.appha.VSphereConnection.java

private static String address(Object obj) {
    if (obj == null) {
        return "@NULL";
    }//www.j  av  a2  s .  c  om
    return "@" + Integer.toHexString(obj.hashCode());
}

From source file:net.darkmist.clf.LogEntry.java

private static int nullSafeHashCode(Object o) {
    if (o == null)
        return 0;
    return o.hashCode();
}

From source file:ObjectUtils.java

/**
 * <p>Gets the hash code of an object returning zero when the
 * object is <code>null</code>.</p>
 *
 * <pre>// w  w w  .  j a v  a2  s  . co  m
 * ObjectUtils.hashCode(null)   = 0
 * ObjectUtils.hashCode(obj)    = obj.hashCode()
 * </pre>
 *
 * @param obj  the object to obtain the hash code of, may be <code>null</code>
 * @return the hash code of the object, or zero if null
 * @since 2.1
 */
public static int hashCode(Object obj) {
    return (obj == null) ? 0 : obj.hashCode();
}

From source file:Main.java

/**
 Hash code for an Object./*from www  .j  a v  a2 s  .  c  om*/
        
 <P><tt>aObject</tt> is a possibly-null object field, and possibly an array.
        
 If <tt>aObject</tt> is an array, then each element may be a primitive
 or a possibly-null object.
 */
public static int hash(int aSeed, Object aObject) {

    int result = aSeed;

    if (aObject == null) {

        result = hash(result, 0);
    } else if (!isArray(aObject)) {

        result = hash(result, aObject.hashCode());
    } else {

        int length = Array.getLength(aObject);

        for (int idx = 0; idx < length; ++idx) {

            Object item = Array.get(aObject, idx);

            //recursive call!
            result = hash(result, item);
        }
    }

    return result;
}

From source file:com.turbospaces.spaces.RemoteJSpace.java

private static Address determineDestination(final Address[] addresses, final Object key) {
    int index = (key.hashCode() & Integer.MAX_VALUE) % addresses.length;
    return addresses[index];
}

From source file:org.grails.plugin.platform.events.ListenerId.java

public static ListenerId build(String namespace, String topic, Object target, Method callback) {
    return new ListenerId(namespace, topic, target.getClass().getName(), callback.getName(),
            Integer.toString(target.hashCode()));
}

From source file:BeanUtility.java

/** This method takes a JavaBean and generates a standard toString() type result for it.
 * @param o JavaBean object to stringinate
 * @return STRINGIATION! Stringingating the countryside. Stringinating all the peasants.
 *//*www  .  ja  v a2 s  . c o m*/
public static String beanToString(Object o) {
    StringBuffer result = new StringBuffer();
    if (o == null)
        return "--- null";
    result.append("--- begin");
    result.append(o.getClass().getName());
    result.append(" hash: ");
    result.append(o.hashCode());
    result.append("\r\n");
    try {
        PropertyDescriptor[] pds = Introspector.getBeanInfo(o.getClass()).getPropertyDescriptors();
        for (int pdi = 0; pdi < pds.length; pdi++) {
            try {
                result.append(
                        "Property: " + pds[pdi].getName() + " Value: " + pds[pdi].getReadMethod().invoke(o));
            } catch (IllegalAccessException iae) {
                result.append("Property: " + pds[pdi].getName() + " (Illegal Access to Value) ");
            } catch (InvocationTargetException iae) {
                result.append(
                        "Property: " + pds[pdi].getName() + " (InvocationTargetException) " + iae.toString());
            } catch (Exception e) {
                result.append("Property: " + pds[pdi].getName() + " (Other Exception )" + e.toString());
            }
            result.append("\r\n");
        }

    } catch (IntrospectionException ie) {
        result.append("Introspection Exception: " + ie.toString());
        result.append("\r\n");
    }
    result.append("--- end ");
    result.append(o.getClass().getName());
    result.append(" hash: ");
    result.append(o.hashCode());
    result.append("\n");
    return result.toString();
}

From source file:org.apache.spark.network.util.JavaUtils.java

/** Returns a hash consistent with Spark's Utils.nonNegativeHash(). */
public static int nonNegativeHash(Object obj) {
    if (obj == null) {
        return 0;
    }/*from  w ww.j  a v  a2s  .  c o  m*/
    int hash = obj.hashCode();
    return hash != Integer.MIN_VALUE ? Math.abs(hash) : 0;
}

From source file:com.espertech.esper.util.ThreadLogUtil.java

private static void write(String text, Object... objects) {
    StringBuilder buf = new StringBuilder();
    buf.append(text);//from   ww  w. j  a  v  a2  s  . c o m
    buf.append(' ');
    for (Object obj : objects) {
        if ((obj instanceof String) || (obj instanceof Number)) {
            buf.append(obj.toString());
        } else {
            buf.append(obj.getClass().getSimpleName());
            buf.append('@');
            buf.append(Integer.toHexString(obj.hashCode()));
        }
        buf.append(' ');
    }
    write(buf.toString());
}