// mode 0 = round v to nearest multiple of x, 1 = round down, 2 = round up function roundToNearestX(v, x, mode) { var mod = v%x; if ((mod>=(x/2) && mode==0) || mode==2) return v+(x-mod); if ((mod<(x/2) && mode==0) || mode==1) return v-mod; } For...
publicclassRounding{publicstaticvoidmain(String[]args){doublenumber=3.14159;doubleroundedNumber=roundToNearest(number,0.05);System.out.println("原始数字: "+number);System.out.println("舍入后的数字: "+roundedNumber);}publicstaticdoubleroundToNearest(doublevalue,doublestep){returnMath.round(value/step)...
您的引号不正确；由于某些原因，它们是unicode。在您的System.out.println语句中，通过手动键入来替换所有...
java.lang.Double.valueOf(String)方法的文档规定。而后者指定使用IEEE 754的round-to-nearest模式来转换。
还有一种方式是使用java.text.DecimalFormat,但也存在问题,format采用的舍入模式是ROUND_HALF_DOWN(舍入模式在下面有介绍),比如说4.025保留两位小数会是4.02,因为.025距离”nearest neighbor”(.02和.03)长度是相等,向下舍入就是.02,如果是4.0251那么保留两位小数就是4.03。
Ceiling 2 Rounding mode to round towards positive infinity. Floor 3 Rounding mode to round towards negative infinity. HalfUp 4 Rounding mode where values are rounded towards the nearest neighbor. Ties are broken by rounding up. HalfDown 5 Rounding mode where values are rounded towards the nearest...
ROUND_HALF_DOWN Rounding mode to round towards"nearest neighbor" unless both neighbors are equidistant, in whichcaseround down. 向(距离)最近的一边舍入,除非两边(的距离)是相等,如果是这样,向下舍入, 例如1.55 保留一位小数结果为1.5ROUND_HALF_EVEN ...
还有一种方式是使用java.text.DecimalFormat,但也存在问题,format采用的舍入模式是ROUND_HALF_DOWN(舍入模式在下面有介绍),比如说4.025保留两位小数会是4.02,因为.025距离”nearest neighbor”(.02和.03)长度是相等,向下舍入就是.02,如果是4.0251那么保留两位小数就是4.03。
Input NumberInput rounded to one digit withHALF_UProunding 5.56 2.53 1.62 1.11 1.01 -1.0-1 -1.1-1 -1.6-2 -2.5-3 -5.5-6 HALF_DOWN public static finalRoundingModeHALF_DOWN Rounding mode to round towards "nearest neighbor" unless both neighbors are equidistant, in which case round down. Beha...
Rounding mode to round towards negative infinity. static int ROUND_HALF_DOWN Rounding mode to round towards "nearest neighbor" unless both neighbors are equidistant, in which case round down. static int ROUND_HALF_EVEN Rounding mode to round towards the "nearest neighbor" unless both nei...