| /* |
| * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * Provides classes that are fundamental to the design of the Java |
| * programming language. The most important classes are {@code |
| * Object}, which is the root of the class hierarchy, and {@code |
| * Class}, instances of which represent classes at run time. |
| * |
| * <p>Frequently it is necessary to represent a value of primitive |
| * type as if it were an object. The wrapper classes {@code Boolean}, |
| * {@code Character}, {@code Integer}, {@code Long}, {@code Float}, |
| * and {@code Double} serve this purpose. An object of type {@code |
| * Double}, for example, contains a field whose type is double, |
| * representing that value in such a way that a reference to it can be |
| * stored in a variable of reference type. These classes also provide |
| * a number of methods for converting among primitive values, as well |
| * as supporting such standard methods as equals and hashCode. The |
| * {@code Void} class is a non-instantiable class that holds a |
| * reference to a {@code Class} object representing the type void. |
| * |
| * <p>The class {@code Math} provides commonly used mathematical |
| * functions such as sine, cosine, and square root. The classes {@code |
| * String}, {@code StringBuffer}, and {@code StringBuilder} similarly |
| * provide commonly used operations on character strings. |
| * |
| * <p>Classes {@code ClassLoader}, {@code Process}, {@code |
| * ProcessBuilder}, {@code Runtime}, {@code SecurityManager}, and |
| * {@code System} provide "system operations" that manage the dynamic |
| * loading of classes, creation of external processes, host |
| * environment inquiries such as the time of day, and enforcement of |
| * security policies. |
| * |
| * <p>Class {@code Throwable} encompasses objects that may be thrown |
| * by the {@code throw} statement. Subclasses of {@code Throwable} |
| * represent errors and exceptions. |
| * |
| * <a id="charenc"></a> |
| * <h2>Character Encodings</h2> |
| * |
| * The specification of the {@link java.nio.charset.Charset |
| * java.nio.charset.Charset} class describes the naming conventions |
| * for character encodings as well as the set of standard encodings |
| * that must be supported by every implementation of the Java |
| * platform. |
| * |
| * @since 1.0 |
| */ |
| package java.lang; |
