double rounding

1 Importjava.math.BigDecimal;2 Importjava.text.DecimalFormat;3 4 public classtestgetint{5 public Static voidmain (string[] Args) {6 Doublei=2, j=2.1, k=2.5, m=2.9; 7System.out.println ("rounding off decimal rounding: math.floor (2) =" + (int)

The simple floating-point number types in Java float and double are not capable of operation. It's not just Java, it's also a problem in many other programming languages.What will we see if we compile and run the following program?public class Test {

1 ImportJava.math.BigDecimal;2 ImportJava.text.DecimalFormat;3 4 Public classTestgetint {5 Public Static voidMain (String[]args) {6 Doublei = 2,7j = 2.1,8K = 2.5,9m = 2.9;TenSystem.out.println ("Rounding off Decimal rounding:

In dealing with some of the data, we want to be able to use the "rounding" method, but C # uses the "four six into 50% pairs" method, such as the following example, is the "four six into 50% pairs" results obtained:Double D1 = Math.Round (1.25, 1);//

BigDecimal Rounding Mode Description:Rounding mode is inside Java.math.RoundingMode:Roundingmode.ceiling: Rounding mode rounded to the positive infinity direction. If the result is positive, the rounding behavior is similar to Roundingmode.up, and

Java: Rounding the double value to five, retaining the two decimal places, double rounding to five1. Functions The double value in the program is accurate to the two digits after the decimal point. It can be rounded up or truncated. For example, if

1.BigDecimal Introduction The BigDecimal consists of an arbitrary precision integer Non scale value and a 32-bit integer scale (scale). If it is zero or positive, the scale is the number of digits after the decimal point. If it is a negative number,

Double display conversion int Static void Main (string [] args){Console. WriteLine ("5.1 ~ {0} ", (int) 5.1d );Console. WriteLine ("5.5 ~ {0} ", (int) 5.5d );Console. WriteLine ("5.8 ~ {0} ", (int) 5.8d );Console. WriteLine ("2.1 ~ {0} ", (int) 2.1d

The Java.math.BigDecimal class provides arithmetic, scale operations, rounding, comparison, hashing algorithms, and format conversion operations.The ToString () method provides a canonical representation of the BigDecimal. It gives the user full

      When processing some data, we hope to use the "Rounding" method, but C # uses the "four homes, six homes, five into two" method, as shown in the following example, the result is obtained using "four homes, six homes, and five into two: double