Rounding necessary exception java

Saved searches

Use saved searches to filter your results more quickly

You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

ArithmeticException: Rounding necessary #1944

ArithmeticException: Rounding necessary #1944

Comments

I am all of a sudden getting the following error:

Exception in thread «main» java.lang.ArithmeticException: Rounding necessary
at java.base/java.math.BigDecimal.commonNeedIncrement(BigDecimal.java:4502)
at java.base/java.math.BigDecimal.needIncrement(BigDecimal.java:4558)
at java.base/java.math.BigDecimal.divideAndRound(BigDecimal.java:4466)
at java.base/java.math.BigDecimal.setScale(BigDecimal.java:2793)
at org.knowm.xchange.gdax.GDAXAdapters.adaptToExchangeMetaData(GDAXAdapters.java:221)
at org.knowm.xchange.gdax.GDAXExchange.remoteInit(GDAXExchange.java:50)
at org.knowm.xchange.BaseExchange.applySpecification(BaseExchange.java:111)
at org.knowm.xchange.ExchangeFactory.createExchange(ExchangeFactory.java:168)

Any idea why this is happening? My code used to work perfectly until 1-2 days ago.

The text was updated successfully, but these errors were encountered:

Источник

Is it possible to detect the occurrence of ‘java.lang.ArithmeticException: Rounding necessary’ before performing rounding?

To solve the problem, consider Solution 3 which involves performing a modulo by 1 [0.1, 0.001] and checking if the remainder is greater than 0. The question at hand involves setting the scale of two BigDecimal numbers. According to the javadoc for BigDecimal, the number is represented as (unscaledValue × 10^-scale), where unscaledValue is an arbitrarily long integer and scale is a 32-bit integer. To accurately represent 2.6*10^-1095, a scale of at least 1096 is required.

Can «java.lang.ArithmeticException: Rounding necessary» is detected before rounding?

It is possible to use setScale(n) on java.math.BigDecimal created from a decimal string in certain cases, but not always.

scala> BigDecimal("1.00000000").setScale(1) res0: scala.math.BigDecimal = 1.0 scala> BigDecimal("1.00000001").setScale(1) java.lang.ArithmeticException: Rounding necessary 

Is there a way to determine whether rounding is required before invoking setScale, in addition to catching the thrown exception?

It is possible to establish a preset rounding option for setScale through the following method:

BigDecimal("1.00000001").setScale(1, scala.math.BigDecimal.RoundingMode.HALF_DOWN) 

Invoke BigDecimal.scale to obtain the present scale of the BigDecimal.

An exception will be thrown by invoking setScale in case the parameter is smaller than the current scale.

One way to check if there is a remainder in a number divided by 1 [0.1, 0.001] is to perform a modulo operation and verify if the resulting value is above 0.

Java — BigDecimal Rounding, Exception in thread «main» java.lang.ArithmeticException: Non-terminating decimal However, if I was to do (1/3)*2, I don’t want it to round up …

Rounding necessary with BigDecimal numbers

In this example, I aim to establish the scale for two BigDecimal values, namely a and b .

BigDecimal a = new BigDecimal("2.6E-1095"); BigDecimal b = new BigDecimal("2.7E-1105"); int i = 112, j=1; BigDecimal aa = a.setScale(i+j); BigDecimal bb = b.setScale(i+j); 

I encounter an error when I execute the program.

java.lang.ArithmeticException: Rounding necessary at java.math.BigDecimal.divideAndRound(BigDecimal.java:1439) at java.math.BigDecimal.setScale(BigDecimal.java:2394) at java.math.BigDecimal.setScale(BigDecimal.java:2437) 

What is the reason for rounding and what alternatives are available if I do not wish to round?

When dealing with two BigDecimal numbers that demand more than 1000 decimal places, attempting to limit the scale to 113 decimal places will result in a loss of accuracy. Consequently, rounding becomes essential.

The exception can be prevented by using setScale methods that involve a RoundingMode, but the rounding cannot be prevented.

Utilize the setScale method’s roundingMode feature.

BigDecimal aa = a.setScale(i+j, BigDecimal.ROUND_HALF_DOWN); 

The javadoc for BigDecimal states that (unscaledValue × 10^-scale) represents BigDecimal , where unscaledValue is an integer of arbitrary length and the scale is a 32-bit integer.

The value 2.6*10^-1095 needs a scale of 1096 or more for accurate representation. It cannot be represented precisely by any integer multiplied by 10^-113. Hence, to accurately represent this value, you must provide a roundingMode .

Java.lang.ArithmeticException: divide by zero, When denominator becomes zero because of small difference, it crashes. Use doubles, check the denominator and if zero, make some value …

RoundingMode.UNNECESSARY throws exception

I created a test to evaluate the functionality of BigDecimal , but encountered an exception when executing RoundingMode.UNNECESSARY . Can someone provide an explanation for this issue?

public class TestRounding2 < public static void main(String args[]) < Locale swedish = new Locale("sv", "SE"); BigDecimal pp; //declare variable pp=pounds pence NumberFormat swedishFormat = NumberFormat.getCurrencyInstance(swedish); Scanner scan = new Scanner(System.in); System.out.println("ENTER POUNDS AND PENCE TO AT LEAST FIVE DECIMAL PLACES :"); pp = scan.nextBigDecimal(); BigDecimal pp1 = pp.setScale(2, RoundingMode.HALF_EVEN); System.out.println("HALF_EVEN: £ " + pp1.toString()); System.out.println(swedishFormat.format(pp1)); BigDecimal pp2 = pp.setScale(2, RoundingMode.FLOOR); System.out.println("FLOOR: £ " + pp2.toString()); System.out.println(swedishFormat.format(pp2)); BigDecimal pp3 = pp.setScale(2, RoundingMode.CEILING); System.out.println("CEILING £: " + pp3.toString()); System.out.println(swedishFormat.format(pp3)); BigDecimal pp4 = pp.setScale(2, RoundingMode.HALF_DOWN); System.out.println("HALF DOWN £: " + pp4.toString()); System.out.println(swedishFormat.format(pp4)); BigDecimal pp5 = pp.setScale(2, RoundingMode.HALF_UP); System.out.println("HALF UP: £ " + pp5.toString()); System.out.println(swedishFormat.format(pp5)); BigDecimal pp6 = pp.setScale(2, RoundingMode.UP); System.out.println("UP: £ " + pp6.toString()); System.out.println(swedishFormat.format(pp6)); BigDecimal pp7 = pp.setScale(2, RoundingMode.DOWN); System.out.println("DOWN: £ " + pp7.toString()); System.out.println(swedishFormat.format(pp7)); BigDecimal pp8 = pp.setScale(2, RoundingMode.UP); System.out.println("UP: " + pp8.toString()); System.out.println(swedishFormat.format(pp8)); >> 

It’s by design. See javadoc:

Specify the rounding mode as exact to ensure that no rounding is required for the requested operation. However, if the specified rounding mode is used for an operation that produces an inexact result, it will result in an being thrown.

This mode is designed to trigger an exception only when there is a value that needs to be rounded.

The code that follows is an example of how to avoid throwing an Exception.

 BigDecimal pp = new BigDecimal(7); pp.setScale(2, RoundingMode.UNNECESSARY); System.out.println(pp); 

An exception is triggered when attempting to convert 7 to a fractional number due to the requirement of rounding.

 BigDecimal pp = new BigDecimal(7.1); pp.setScale(2, RoundingMode.UNNECESSARY); // java.lang.ArithmeticException: Rounding necessary System.out.println(pp); 

Exception in thread «main» java.lang.ArithmeticException, Required, but never shown Post Your Answer How to round a number to n decimal places in Java. 1571. Fastest way to determine if an …

Certain BigDecimal numbers in Java when divided causes the ArithmeticException to be thrown

The given method of performing division on two BegDecimal numbers is effective.

BigDecimal a=new BigDecimal(5); BigDecimal b=new BigDecimal(2); System.out.println(a.divide(b)); 

Despite using the identical method, this strategy proves ineffective when applied to the java.lang.ArithmeticException .

BigDecimal c=new BigDecimal(361); BigDecimal d=new BigDecimal(6); System.out.println(c.divide(d)); 

Here is the entire instance of the exception identified as stack trace.

Exception in thread "main" java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result. at java.math.BigDecimal.divide(BigDecimal.java:1603) at currenttime.Main.main(Main.java:15) Java Result: 1 

According to the Java specification, the exception thrown is expected as no scale has been provided. The calculation results in 60.1(6), hence the need for a scale to specify the number of digits after the decimal point to be returned or to use divideAndReminder for division with a remainder.

One option would be to round the number to five decimal places.

BigDecimal c=new BigDecimal(361); BigDecimal d=new BigDecimal(6); System.out.println(c.divide(d, 5, BigDecimal.ROUND_HALF_EVEN)); 

When BigDecimal.Divide is invoked, it will throw an ArithmeticException error if the result contains a non-terminating decimal quotient. For example, 361 divided by 6 results in 60.1666666. which is not a whole number and therefore will trigger the ArithmeticException error.

In case the precise quotient cannot be achieved, an ArithmeticException will be thrown.

To prevent this, employ overload and supply an additional parameter using RoundingMode .

In other words, you provide BigDecimal with clear instructions regarding the desired outcome of the division.

ArithmeticException Java?, java.lang.ArithmeticException: / by zero at [filename:line timeInSecs = timeTaken/1000D; speed = 45D/timeInSecs; // D is not necessary …

Источник

Saved searches

Use saved searches to filter your results more quickly

You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

HiveSinkWriter gives: Rounding necessary exception and also swallows the exception #270

HiveSinkWriter gives: Rounding necessary exception and also swallows the exception #270

Comments

I think the following code in HiveSinkWriter should re-throw the exception as opposed to logging and swallowing it:

for (k - 0 until ioThreads) < writerPool.submit < try < BlockingQueueConcurrentIterator(buffer, Row.Sentinel).foreach < row => val writer = getOrCreateHiveWriter(row, k)._2 // need to strip out any partition information from the written data and possibly pad writer.write(normalizer(row)) > > catch < case NonFatal(e) => logger.error("Could not perform write", e) > > >

Math Rounding Exception

14:13:35.448 [pool-12-thread-1] ERROR io.eels.component.hive.HiveSinkWriter - Could not perform write java.lang.ArithmeticException: Rounding necessary at java.math.BigDecimal.commonNeedIncrement(BigDecimal.java:4148) ~[?:1.8.0_71] at java.math.BigDecimal.needIncrement(BigDecimal.java:4204) ~[?:1.8.0_71] at java.math.BigDecimal.divideAndRound(BigDecimal.java:4112) ~[?:1.8.0_71] at java.math.BigDecimal.setScale(BigDecimal.java:2452) ~[?:1.8.0_71] at java.math.BigDecimal.setScale(BigDecimal.java:2512) ~[?:1.8.0_71] at scala.math.BigDecimal.setScale(BigDecimal.scala:662) ~[scala-library-2.11.8.jar:?] at io.eels.component.parquet.DecimalWriter.write(ParquetValueWriter.scala:97) ~[eel-components_2.11-1.1.1.jar:1.1.1] at io.eels.component.parquet.StructWriter$$anonfun$write$1.apply$mcVI$sp(ParquetValueWriter.scala:70) ~[eel-components_2.11-1.1.1.jar:1.1.1] at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:160) ~[scala-library-2.11.8.jar:?] at io.eels.component.parquet.StructWriter.write(ParquetValueWriter.scala:63) ~[eel-components_2.11-1.1.1.jar:1.1.1] at io.eels.component.parquet.RowWriter.write(RowWriteSupport.scala:39) ~[eel-components_2.11-1.1.1.jar:1.1.1] at io.eels.component.parquet.RowWriteSupport.write(RowWriteSupport.scala:30) ~[eel-components_2.11-1.1.1.jar:1.1.1] at io.eels.component.parquet.RowWriteSupport.write(RowWriteSupport.scala:13) ~[eel-components_2.11-1.1.1.jar:1.1.1] at org.apache.parquet.hadoop.InternalParquetRecordWriter.write(InternalParquetRecordWriter.java:123) ~[parquet-hadoop-1.9.0.jar:1.9.0] at org.apache.parquet.hadoop.ParquetWriter.write(ParquetWriter.java:292) ~[parquet-hadoop-1.9.0.jar:1.9.0] at io.eels.component.hive.dialect.ParquetHiveDialect$$anon$2.write(ParquetHiveDialect.scala:49) ~[eel-hive_2.11-1.1.1.jar:1.1.1] at io.eels.component.hive.HiveSinkWriter$$anonfun$2$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply(HiveSinkWriter.scala:91) ~[eel-hive_2.11-1.1.1.jar:1.1.1] at io.eels.component.hive.HiveSinkWriter$$anonfun$2$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply(HiveSinkWriter.scala:88) ~[eel-hive_2.11-1.1.1.jar:1.1.1] at scala.collection.Iterator$class.foreach(Iterator.scala:893) ~[scala-library-2.11.8.jar:?] at com.sksamuel.exts.collection.BlockingQueueConcurrentIterator.foreach(BlockingQueueConcurrentIterator.scala:10) ~[exts_2.11-1.42.0.jar:1.42.0] at io.eels.component.hive.HiveSinkWriter$$anonfun$2$$anonfun$apply$1.apply$mcV$sp(HiveSinkWriter.scala:88) [eel-hive_2.11-1.1.1.jar:1.1.1] at io.eels.component.hive.HiveSinkWriter$$anonfun$2$$anonfun$apply$1.apply(HiveSinkWriter.scala:87) [eel-hive_2.11-1.1.1.jar:1.1.1] at io.eels.component.hive.HiveSinkWriter$$anonfun$2$$anonfun$apply$1.apply(HiveSinkWriter.scala:87) [eel-hive_2.11-1.1.1.jar:1.1.1] at scala.util.Try$.apply(Try.scala:192) [scala-library-2.11.8.jar:?] at com.sksamuel.exts.concurrent.ExecutorImplicits$RichExecutorService$$anon$2.run(ExecutorImplicits.scala:28) [exts_2.11-1.42.0.jar:1.42.0] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_71] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_71] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_71] 

The text was updated successfully, but these errors were encountered:

Источник