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  /*
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   * Copyright 2003 Sun Microsystems, Inc.  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.  Sun designates this
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   * particular file as subject to the "Classpath" exception as provided
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   * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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  * CA 95054 USA or visit www.sun.com if you need additional information or
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  * have any questions.
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  */
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 package sun.misc;

This class contains additional constants documenting limits of the double type.

Author(s):
Joseph D. Darcy
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 public class DoubleConsts {
    
Don't let anyone instantiate this class. 
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     private DoubleConsts() {}
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     public static final double POSITIVE_INFINITY = ...;
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     public static final double NEGATIVE_INFINITY = ...;
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     public static final double NaN = ...;
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     public static final double MAX_VALUE = ...;
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     public static final double MIN_VALUE = ...;

    
A constant holding the smallest positive normal value of type double, 2-1022. It is equal to the value returned by Double.longBitsToDouble(0x0010000000000000L).

Since:
1.5
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     public static final double  MIN_NORMAL      = 2.2250738585072014E-308;


    
The number of logical bits in the significand of a double number, including the implicit bit. 
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     public static final int SIGNIFICAND_WIDTH   = 53;

    
Maximum exponent a finite double number may have. It is equal to the value returned by Math.ilogb(Double.MAX_VALUE). 
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     public static final int     MAX_EXPONENT    = 1023;

    
Minimum exponent a normalized double number may have. It is equal to the value returned by Math.ilogb(Double.MIN_NORMAL). 
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     public static final int     MIN_EXPONENT    = -1022;

    
The exponent the smallest positive double subnormal value would have if it could be normalized. It is equal to the value returned by FpUtils.ilogb(Double.MIN_VALUE). 
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     public static final int     MIN_SUB_EXPONENT =  -
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                                                    ( - 1);

    
Bias used in representing a double exponent. 
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     public static final int     EXP_BIAS        = 1023;

    
Bit mask to isolate the sign bit of a double. 
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     public static final long    SIGN_BIT_MASK   = 0x8000000000000000L;

    
Bit mask to isolate the exponent field of a double. 
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    public static final long    EXP_BIT_MASK    = 0x7FF0000000000000L;

    
Bit mask to isolate the significand field of a double. 
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    public static final long    SIGNIF_BIT_MASK = 0x000FFFFFFFFFFFFFL;
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    static {
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        // verify bit masks cover all bit positions and that the bit
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        // masks are non-overlapping
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        assert((( |  | ) == ~0L) &&
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               ((( & ) == 0L) &&
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                (( & ) == 0L) &&
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                (( & ) == 0L)));
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    }
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