Java small number processing, BigDecimal class application

1. Construct a BigDecimal object:

1         // Create a BigDecimal object, initialization must use a string, because numeric initialization results in approximate values, inaccurate 2         New BigDecimal ("1.232324"); 3 4         // to replace floating-point numbers with BigDecimal objects 5         double d = 1.3422424; 6         BigDecimal bigdecimaltwo =bigdecimal.valueof (d);

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2. BigDecimal member Method:

1         //bigdecimalone plus bigdecimaltwo, then return a new object2 Bigdecimalone.add (bigdecimaltwo);3         4         //Bigdecimalone minus Bigdecimaltwo, then returns a new object5 bigdecimalone.subtract (bigdecimaltwo);6 7         //bigdecimalone times Bigdecimaltwo, then returns a new object8 bigdecimalone.multiply (bigdecimaltwo);9 Ten         //Bigdecimalone divided by Bigdecimaltwo and then returns a new object OneBigdecimalone.divide (Bigdecimaltwo);

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3. BigDecimal objects into basic data types:

        // converts the value of the BigDecimal object to the corresponding string         bigdecimalone.tostring ();         // BigDecimal to return a double value         Bigdecimalone.doublevalue ();         // BigDecimal to return float         Bigdecimalone.floatvalue ();         // BigDecimal to return a Long value         Bigdecimalone.longvalue ();         // BigDecimal returns an int value        Bigdecimalone.intvalue ();

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4, the way of rounding in Java:

Java decimal Processing, BigDecimal class application