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Showing content from https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/math/MathContext.html below:

MathContext (Java SE 11 & JDK 11 )

• • Field Detail
    • UNLIMITED

      public static final MathContext UNLIMITED

      A MathContext object whose settings have the values required for unlimited precision arithmetic. The values of the settings are: precision=0 roundingMode=HALF_UP

    • DECIMAL32

      public static final MathContext DECIMAL32

      A

      MathContext

      object with a precision setting matching the IEEE 754R Decimal32 format, 7 digits, and a rounding mode of

      HALF_EVEN

      , the IEEE 754R default.

    • DECIMAL64

      public static final MathContext DECIMAL64

      A

      MathContext

      object with a precision setting matching the IEEE 754R Decimal64 format, 16 digits, and a rounding mode of

      HALF_EVEN

      , the IEEE 754R default.

    • DECIMAL128

      public static final MathContext DECIMAL128

      A

      MathContext

      object with a precision setting matching the IEEE 754R Decimal128 format, 34 digits, and a rounding mode of

      HALF_EVEN

      , the IEEE 754R default.

  • Constructor Detail
    • MathContext

      public MathContext​(int setPrecision)

      Constructs a new

      MathContext

      with the specified precision and the

      HALF_UP

      rounding mode.

      Parameters:

      setPrecision - The non-negative int precision setting.

      Throws:

      IllegalArgumentException - if the setPrecision parameter is less than zero.

    • MathContext

      public MathContext​(int setPrecision,
                         RoundingMode setRoundingMode)

      Constructs a new MathContext with a specified precision and rounding mode.

      Parameters:

      setPrecision - The non-negative int precision setting.

      setRoundingMode - The rounding mode to use.

      Throws:

      IllegalArgumentException - if the setPrecision parameter is less than zero.

      NullPointerException - if the rounding mode argument is null

    • MathContext

      public MathContext​(String val)

      Constructs a new

      MathContext

      from a string. The string must be in the same format as that produced by the

      toString()

      method.

      An IllegalArgumentException is thrown if the precision section of the string is out of range (< 0) or the string is not in the format created by the toString() method.

      Parameters:

      val - The string to be parsed

      Throws:

      IllegalArgumentException - if the precision section is out of range or of incorrect format

      NullPointerException - if the argument is null

  • Method Detail
    • getPrecision

      public int getPrecision()

      Returns the precision setting. This value is always non-negative.

      Returns:

      an int which is the value of the precision setting

    • getRoundingMode

      public RoundingMode getRoundingMode()

      Returns:

      a RoundingMode object which is the value of the roundingMode setting

    • equals

      public boolean equals​(Object x)

      Compares this MathContext with the specified Object for equality.

      Overrides:

      equals in class Object

      Parameters:

      x - Object to which this MathContext is to be compared.

      Returns:

      true if and only if the specified Object is a MathContext object which has exactly the same settings as this object

      See Also:

      Object.hashCode(), HashMap

    • hashCode

      public int hashCode()

      Returns the hash code for this MathContext.

      Overrides:

      hashCode in class Object

      Returns:

      hash code for this MathContext

      See Also:

      Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

    • toString

      public String toString()

      Returns the string representation of this

      MathContext

      . The

      String

      returned represents the settings of the

      MathContext

      object as two space-delimited words (separated by a single space character,

      '\u0020'

      , and with no leading or trailing white space), as follows:

      1. The string "precision=", immediately followed by the value of the precision setting as a numeric string as if generated by the Integer.toString method.
      2. The string "roundingMode=", immediately followed by the value of the roundingMode setting as a word. This word will be the same as the name of the corresponding public constant in the RoundingMode enum.

      For example:

       precision=9 roundingMode=HALF_UP
       

      Additional words may be appended to the result of

      toString

      in the future if more properties are added to this class.

      Overrides:

      toString in class Object

      Returns:

      a String representing the context settings

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