If you think the Android project droid-fu listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code
/*
* Copyright (C) 2007 Google Inc. Licensed under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
* or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*///fromwww.java2s.compackage com.google.common.base;
import java.util.Arrays;
/**
* Helper functions that can operate on any {@code Object}.
*
* @author Laurence Gonsalves
*/publicfinalclass Objects {
private Objects() {
}
/**
* Determines whether two possibly-null objects are equal. Returns:
* <ul>
* <li>{@code true} if {@code a} and {@code b} are both null.
* <li>{@code true} if {@code a} and {@code b} are both non-null and they
* are equal according to {@link Object#equals(Object)}.
* <li>{@code false} in all other situations.
* </ul>
* <p>
* This assumes that any non-null objects passed to this function conform to
* the {@code equals()} contract.
*/publicstaticboolean equal(Object a, Object b) {
return a == b || (a != null && a.equals(b));
}
/**
* Generates a hash code for multiple values. The hash code is generated by
* calling {@link Arrays#hashCode(Object[])}.
* <p>
* This is useful for implementing {@link Object#hashCode()}. For example,
* in an object that has three properties, {@code x}, {@code y}, and {@code
* z}, one could write:
*
* <pre>
* public int hashCode() {
* return Objects.hashCode(getX(), getY(), getZ());
* }
* </pre>
*
* <b>Warning</b>: When a single object is supplied, the returned hash code
* does not equal the hash code of that object.
*/publicstaticint hashCode(Object... objects) {
return Arrays.hashCode(objects);
}
}