If the calculation of your function is too slow for your purpose you should verify whether you really need the full precision in your particular use case. Sometimes you can adapt the precision depending on input factors of your calculation. How are the mathematical functions inBigDecimalMathcalculated?
以下是使用二分查找法逼近开方值的代码示例: doublenumber=16;doublelow=0;doublehigh=number;doubleprecision=0.00001;while(high-low>precision){doublemid=(low+high)/2;doublesquare=mid*mid;if(square>number){high=mid;}else{low=mid;}}doublesquareRoot=(low+high)/2;System.out.println("平方根为:"+sq...
Note that if the result is subnormal, precision may be lost; that is, when scalb(x, n) is subnormal, scalb(scalb(x, n), -n) may not equal x. When the result is non-NaN, the result has the same sign as d. Special cases: If the first argument is NaN, NaN is returned. ...
Namespace: Java.Math Assembly: Mono.Android.dll Immutable, arbitrary-precision signed decimal numbers.C# Копиране [Android.Runtime.Register("java/math/BigDecimal", DoNotGenerateAcw=true)] public class BigDecimal : Java.Lang.Number, IDisposable, Java.Interop.IJavaPeerable, Java.Lang....
StrictMath String StringBuffer StringBufferInputStream StringBuilder StringCharacterIterator StringContent StringHolder StringIndexOutOfBoundsException StringMonitor StringMonitorMBean StringNameHelper StringReader StringRefAddr StringSelection StringSeqHelper StringSeqHolder StringTokenizer String...
Math Math functionality includes floating point libraries and arbitrary-precision math. For more information, see theMath documentation. Monitoring and Management Comprehensive monitoring and management support for Java platform including Monitoring and Management API for Java virtual machine, Monitoring and Ma...
}doublelow = 0;doublehigh = num/2;doubleprecision = 0.000001; //格式化,保证输出位数 DecimalFormat df=newDecimalFormat("#.00");doubleres =high;while(Math.abs(num-(res*res))>precision) {if(high*high >num) {doublen= high - (high-low)/2;if(n*n>num) { ...
BigDecimal java.lang.Object |---java.lang.Number |---|---java.math.BigDecimal public class BigDeci……欲了解更多信息欢迎访问华为HarmonyOS开发者官网
Double: a 64-bit double-precision IEEE 754 floating-point number (takes two slots in the constant pool table) 1.0.2 7 2 bytes Class reference: an index within the constant pool to a UTF-8 string containing the fully qualified class name (in internal format) (big-endian) 1.0.2 8 2 by...
也可以调用Math.random()生成随机数 Random实例是线程安全的,但是并发使用Random实例会影响效率,可以考虑使用java.util.concurrent.ThreadLocalRandom(jdk1.7)。 /*** A random number generator isolated to the current thread. Like the * global {@linkjava.util.Random} generator used by the {@link* java....