bigdecimal

问题 I would like to define an object with BigDecimal as String in swagger.json Right now I can do "MyObject": { "type": "object", "properties": { "amountOfMoney": { "type": "string", "pattern": "d+([.]d+)?" }, "name": { "type": "string" } }, "title": "MyObject" } Another way, I can Define amountOfMoney as a number. "MyObject": { "type": "object", "properties": { "amountOfMoney": { "type": "number" "minimum": 0.0, "maximum": 100.0, "exclusiveMinimum": false, "exclusiveMaximum": false }, "name": {

问题 I've got a list of BigDecimals to sum. If they were Strings to concatenate, I would use StringBuilder to reduce object creation. Is there something similar for BigDecimal? Or maybe I shouldn't bother about it? Is optimization of BigDecimal creation worth putting effort to it? BigDecimal result = BigDecimal.ZERO; for (CashReportElement element : getReportElementSet()) { if (element.getCurrencyCode().equals(currencyCode)) { result = result.add(element.getSum()); } } return result; 回答1: The is

问题 I have the following code: BigDecimal result = BigDecimal.ZERO; result.setScale(2, BigDecimal.ROUND_FLOOR); //1 BigDecimal amountSum; // amount sum computation BigDecimal amountByCurrency = amountSum.divide(32); //-0.04 result.add(amountByCurrency); //2 After line //1 scale is still 0. Why? So, the //2 evaluation doesn't affect to the result. What's wrong? 回答1: The important part of the #setScale documentation is this: Note that since BigDecimal objects are immutable , calls of this method do

问题 <fmt:formatNumber var="instAmount" value="${invoice.amount / offer.getTotalInstallments()}" minFractionDigits="2" /> Where amount is BigDecimal in Java and totalInstallments is int . I tried by setting totalInstallments to double but nothing changes. It returns an Integer , it behaves as when you divide two integers in Java, you get an integer. Am I missing something or is there a workaround? 回答1: The easiest solution is to just do this calculation in the controller/servlet and use the result

问题 I would like to pass the double value received from web page to sqlServer database. the value are wrapped in a value object. public class testVO{ Double value; public Double getValue() { return value; } public void setValue(Double value) { this.value = value; } } However, the problem I've met is when the value is smaller than 0.0001, it will transfer into 1.0E-4 or other scientific-notation, which causes the database error. The way I found is to use BigDecimal.valueOf(testVO.getValue()) to

问题 I am trying to establish some concise overview of what options for precise caluclations we have in JAVA+SQL. So far I have found following options: use doubles accepting their drawbacks, no go. use BigDecimals using them in complicated formulas is problematic for me use String.format/Decimal.format to round doubles do i need to round each variable in formula or just result to get BigDecimal precision? how can this be tweaked? use computed fields option in SQL. drawback is that I'd need

问题 I'm using the MS JDBC driver for SQL Server, and trying to insert values into a decimal(18,5) column. The docs say that decimal columns map to BigDecimal, so I'm trying to do this: PreparedStatement ps = conn.prepareStatement("INSERT INTO [dbo].[AllTypesTable] ([decimal18_0Col]) VALUES (?)"); ps.setObject(1, new BigDecimal(3.14)); ps.execute(); On the call to execute(), I get this error: com.microsoft.sqlserver.jdbc.SQLServerException: Error converting data type nvarchar to decimal. The

问题 This question already has answers here : BigDecimal equals() versus compareTo() (3 answers) Closed 3 years ago . I have the following same strange situation into a JUnit test. So I have this test method: @Test public void getNavInfoTest() throws ParseException { TirAliquotaRamoI expectedObject = new TirAliquotaRamoI(); DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); Date date; date = formatter.parse("2015-08-01"); Date dataInizio = formatter.parse("2015-08-01"); Date dataFine =