totalcross.util

Class Properties.Double

java.lang.Object

totalcross.util.Properties.Value

totalcross.util.Properties.Double

Enclosing class:

Properties

public static class Properties.Double
extends Properties.Value

Implements a value of type double

Field Summary

Fields

Modifier and Type	Field and Description
static char	TYPE
double	value

Fields inherited from class totalcross.util.Properties.Value

type, typeStr

Constructor Summary

Constructors

Constructor and Description
Double(double value)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Compares this object against the specified object.
int	hashCode() Returns a hash code for this Double object.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TYPE

public static final char TYPE

See Also:

Constant Field Values

value

public double value

Constructor Detail

Double

public Double(double value)

Method Detail

toString

public java.lang.String toString()

Specified by:

toString in class Properties.Value

hashCode

public int hashCode()

Returns a hash code for this Double object. The result is the exclusive OR of the two halves of the long integer bit representation, exactly as produced by the method doubleToLongBits(double), of the primitive double value represented by this Double object. That is, the hash code is the value of the expression:

 (int) (v ˆ (v >>> 32))
 

where v is defined by:

 long v = Convert.doubleToLongBits(this.value);
 

Overrides:

hashCode in class java.lang.Object

Since:

TotalCross 1.25

equals

public boolean equals(java.lang.Object obj)

Compares this object against the specified object. The result is true if and only if the argument is not null and is a Double object that represents a double that has the same value as the double represented by this object. For this purpose, two double values are considered to be the same if and only if the method doubleToLongBits(double) returns the identical long value when applied to each.

Note that in most cases, for two instances of class Double, d1 and d2, the value of d1.equals(d2) is true if and only if

 Convert.doubleToLongBits(d1.value) == Convert.doubleToLongBits(d2.value)
 

also has the value true. However, there are two exceptions:

• If d1 and d2 both represent Convert.DOUBLE_NAN_BITS, then the equals method returns true, even though Convert.doubleToLongBits(Convert.DOUBLE_NAN_BITS) == Convert.doubleToLongBits(Convert.DOUBLE_NAN_BITS) has the value false.
• If d1 represents +0.0 while d2 represents -0.0, or vice versa, the equal test has the value false, even though +0.0==-0.0 has the value true.

This definition allows hash tables to operate properly.

Overrides:

equals in class java.lang.Object

Since:

TotalCross 1.25