/*
 
* Copyright (c) 1994, 2011, 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.
 
*/

package java.lang;

/**
 
* The abstract class {@code Number} is the superclass of platform
 
* classes representing numeric values that are convertible to the
 
* primitive types {@code byte}, {@code double}, {@code float}, {@code
 
* int}, {@code long}, and {@code short}.
 
*
 
* The specific semantics of the conversion from the numeric value of
 
* a particular {@code Number} implementation to a given primitive
 
* type is defined by the {@code Number} implementation in question.
 
*
 
* For platform classes, the conversion is often analogous to a
 
* narrowing primitive conversion or a widening primitive conversion
 
* as defining in <cite>The Java&trade; Language Specification</cite>
 
* for converting between primitive types.
  
Therefore, conversions may
 
* lose information about the overall magnitude of a numeric value, may
 
* lose precision, and may even return a result of a different sign
 
* than the input.
 
*
 
* See the documentation of a given {@code Number} implementation for
 
* conversion details.
 
*
 
* @author
      
Lee Boynton
 
* @author
      
Arthur van Hoff
 
* @jls 5.1.2 Widening Primitive Conversions
 
* @jls 5.1.3 Narrowing Primitive Conversions
 
* @since
   
JDK1.0
 
*/

public abstract class Number implements java.io.Serializable {
    
/**
     
* Returns the value of the specified number as an {@code int},
     
* which may involve rounding or truncation.
     
*
     
* @return
  
the numeric value represented by this object after conversion
     
*
          
to type {@code int}.
     
*/

    
public abstract int intValue();

    
/**
     
* Returns the value of the specified number as a {@code long},
     
* which may involve rounding or truncation.
     
*
     
* @return
  
the numeric value represented by this object after conversion
     
*
          
to type {@code long}.
     
*/

    
public abstract long longValue();

    
/**
     
* Returns the value of the specified number as a {@code float},
     
* which may involve rounding.
     
*
     
* @return
  
the numeric value represented by this object after conversion
     
*
          
to type {@code float}.
     
*/

    
public abstract float floatValue();

    
/**
     
* Returns the value of the specified number as a {@code double},
     
* which may involve rounding.
     
*
     
* @return
  
the numeric value represented by this object after conversion
     
*
          
to type {@code double}.
     
*/

    
public abstract double doubleValue();

    
/**
     
* Returns the value of the specified number as a {@code byte},
     
* which may involve rounding or truncation.
     
*
     
* <p>This implementation returns the result of {@link #intValue} cast
     
* to a {@code byte}.
     
*
     
* @return
  
the numeric value represented by this object after conversion
     
*
          
to type {@code byte}.
     
* @since
   
JDK1.1
     
*/

    
public byte byteValue() {
        
return (byte)intValue();
    
}

    
/**
     
* Returns the value of the specified number as a {@code short},
     
* which may involve rounding or truncation.
     
*
     
* <p>This implementation returns the result of {@link #intValue} cast
     
* to a {@code short}.
     
*
     
* @return
  
the numeric value represented by this object after conversion
     
*
          
to type {@code short}.
     
* @since
   
JDK1.1
     
*/

    
public short shortValue() {
        
return (short)intValue();
    
}

    
/** use serialVersionUID from JDK 1.0.2 for interoperability */
    
private static final long serialVersionUID = -8742448824652078965L;
}