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:com.googlecode.memcachefy.hashkey.HashKeyGenerator.java

/**
 * Generates a hashkey using the object's own hashCode function
 *
 * @param method/*from  w  ww  .  ja v  a2s .c o m*/
 * @param parameters
 * @return
 */
public static Integer defaultHashKey(Method method, Object[] parameters) {

    int hashCode = method.getName().hashCode();

    if (parameters == null || parameters.length == 0) {
        return hashCode;
    }

    if (parameters.length == 1) {
        return 17 * hashCode + (parameters[0] == null ? method.getName().hashCode() : parameters[0].hashCode());
    }

    for (Object object : parameters) {
        hashCode = 31 * hashCode + (object == null ? NULL_PARAM_KEY : object.hashCode());
    }

    return hashCode;
}

From source file:Main.java

public static int hashCode(@Nullable Object o1, @Nullable Object o2, @Nullable Object o3) {
    return hashCode(o1 == null ? 0 : o1.hashCode(), o2 == null ? 0 : o2.hashCode(),
            o3 == null ? 0 : o3.hashCode());
}

From source file:edu.cornell.mannlib.vitro.webapp.utils.logging.ToString.java

public static String hashHex(Object o) {
    return (o == null) ? "@00000000" : String.format("@%08x", o.hashCode());
}

From source file:Main.java

public static int hashCode(@Nullable Object o1, @Nullable Object o2, @Nullable Object o3, @Nullable Object o4) {
    return hashCode(o1 == null ? 0 : o1.hashCode(), o2 == null ? 0 : o2.hashCode(),
            o3 == null ? 0 : o3.hashCode(), o4 == null ? 0 : o4.hashCode());
}

From source file:org.pentaho.di.utils.TestUtils.java

public static void checkEqualsHashCodeConsistency(Object object1, Object object2) {
    if (object1.equals(object2)) {
        assertTrue("inconsistent hashcode and equals", object1.hashCode() == object2.hashCode());
    }//from   w  w  w  .ja  v a 2s  .co  m
}

From source file:Main.java

private static int listHashCode(Iterable<?> l) {
    int ret = 1;//from  ww w.  jav a 2  s .  co  m
    for (Object e : l) {
        // don't overflow stack if list contains itself -- substitute default hashcode
        int elementHash = e == l ? System.identityHashCode(l) : (e == null ? 0 : e.hashCode());
        ret = 31 * ret + elementHash;
    }
    return ret;
}

From source file:Main.java

public static int hashCode(@Nullable Object o1, @Nullable Object o2, @Nullable Object o3, @Nullable Object o4,
        @Nullable Object o5) {//  w w w. jav  a2s  .  com
    return hashCode(o1 == null ? 0 : o1.hashCode(), o2 == null ? 0 : o2.hashCode(),
            o3 == null ? 0 : o3.hashCode(), o4 == null ? 0 : o4.hashCode(), o5 == null ? 0 : o5.hashCode());
}

From source file:Main.java

/**
 * Computes the hash code for a set per the contract defined by {@link Set#hashCode()}.
 * //w w  w . j a  v  a2  s.  c o m
 * @param set the set
 * @return the hash code for {@code list}
 */
public static int hashCode(Set<?> set) {
    int hashCode = 0;
    for (Object item : set) {
        if (item != null) {
            // don't overflow stack if set contains itself -- substitute default hashcode
            hashCode += item == set ? System.identityHashCode(set) : item.hashCode();
        }
    }
    return hashCode;
}

From source file:Main.java

public static int hashCode(@Nullable Object o1, @Nullable Object o2, @Nullable Object o3, @Nullable Object o4,
        @Nullable Object o5, @Nullable Object o6) {
    return hashCode(o1 == null ? 0 : o1.hashCode(), o2 == null ? 0 : o2.hashCode(),
            o3 == null ? 0 : o3.hashCode(), o4 == null ? 0 : o4.hashCode(), o5 == null ? 0 : o5.hashCode(),
            o6 == null ? 0 : o6.hashCode());
}

From source file:com.dragome.callbackevictor.serverside.utils.ReflectionUtils.java

public static String getClassName(final Object o) {
    if (o == null) {
        return "unknown";
    }//  w w w.j  a  va  2 s. c  o  m

    return o.getClass().getName() + "@" + o.hashCode();
}