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