public class BigDecimal
- Object
- BigDecimal
Class representing a simple version of a big decimal. A
BigDecimal is basically a
BigInteger with a few digits on the right of
the decimal point. The number of (binary) digits on the right of the decimal
point is called the scale of the BigDecimal.
Unlike in BigDecimal, the scale is not adjusted
automatically, but must be set manually. All BigDecimals
taking part in the same arithmetic operation must have equal scale. The
result of a multiplication of two BigDecimals returns a
BigDecimal with double scale.Constructors
public BigDecimal(BigInteger bigInt, int scale) | Constructor for BigDecimal. |
Methods
Inherited methods
Constructor details
BigDecimal
public BigDecimal(BigInteger bigInt, int scale)Constructor for
BigDecimal. The value of the
constructed BigDecimal equals bigInt / 10scale.Parameters
bigIntBigInteger- The
bigIntvalue parameter. scaleint- The scale of the constructed
BigDecimal.
Method details
getInstance
public static BigDecimal getInstance(BigInteger value, int scale)Deprecated. This method is not part of the JDK’s
BigDecimal class and its presence is historical,
as the first implementation of Codename One’s BigDecimal class was ported from BouncyCastle, which is different
than the JDK’s BigDecimal class in that is optimizes binary arithmetic. The implementation of this method
is counter-intuitive since it performs a bitwise left shift on value before scaling it. Use int)
instead if you just want to convert a BigInteger into a BigDecimal. Do not rely on this method
as it will be removed in a future version of Codename One..Returns a
BigDecimal with value value / 2scale / 10scaleParameters
valueBigInteger- The value of the
BigDecimalto be created. scaleint- The scale of the
BigDecimalto be created.
Returns
The such created
BigDecimal.adjustScale
public BigDecimal adjustScale(int newScale)add
public BigDecimal add(BigDecimal b)add
public BigDecimal add(BigInteger b)negate
public BigDecimal negate()subtract
public BigDecimal subtract(BigDecimal b)subtract
public BigDecimal subtract(BigInteger b)multiply
public BigDecimal multiply(BigDecimal b)multiply
public BigDecimal multiply(BigInteger b)divide
public BigDecimal divide(BigDecimal b)divide
public BigDecimal divide(BigInteger b)shiftLeft
public BigDecimal shiftLeft(int n)compareTo
public int compareTo(BigDecimal val)compareTo
public int compareTo(BigInteger val)floor
public BigInteger floor()round
public BigInteger round()intValue
public int intValue()longValue
public long longValue()getScale
public int getScale()toString
public String toString()Returns a string representation of the object. In general, the toString method returns a string that “textually represents” this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.
The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@’, and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
getClass().getName() + ‘@’ + Integer.toHexString(hashCode())
equals
public boolean equals(Object o)Indicates whether some other object is “equal to” this one.
The equals method implements an equivalence relation: It is reflexive: for any reference value x, x.equals(x) should return true. It is symmetric: for any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true. It is transitive: for any reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true. It is consistent: for any reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the object is modified. For any non-null reference value x, x.equals(null) should return false.
The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference values x and y, this method returns true if and only if x and y refer to the same object (x==y has the value true).
hashCode
public int hashCode()Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.
The general contract of hashCode is: Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables.
As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)