java.lang.Math.multiplyExact()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.lang.Math.multiplyExact()方法的一些代码示例，展示了Math.multiplyExact()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Math.multiplyExact()方法的具体详情如下：
包路径：java.lang.Math
类名称：Math
方法名：multiplyExact

Math.multiplyExact介绍

暂无

代码示例

代码示例来源：origin: spring-projects/spring-framework

  1. /**
  2.  * Obtain a {@link DataSize} representing the specified number of kilobytes.
  3.  * @param kilobytes the number of kilobytes, positive or negative
  4.  * @return a {@link DataSize}
  5.  */
  6. public static DataSize ofKilobytes(long kilobytes) {
  7.   return new DataSize(Math.multiplyExact(kilobytes, BYTES_PER_KB));
  8. }

代码示例来源：origin: spring-projects/spring-framework

  1. /**
  2.  * Obtain a {@link DataSize} representing the specified number of megabytes.
  3.  * @param megabytes the number of megabytes, positive or negative
  4.  * @return a {@link DataSize}
  5.  */
  6. public static DataSize ofMegabytes(long megabytes) {
  7.   return new DataSize(Math.multiplyExact(megabytes, BYTES_PER_MB));
  8. }

代码示例来源：origin: spring-projects/spring-framework

  1. /**
  2.  * Obtain a {@link DataSize} representing the specified number of gigabytes.
  3.  * @param gigabytes the number of gigabytes, positive or negative
  4.  * @return a {@link DataSize}
  5.  */
  6. public static DataSize ofGigabytes(long gigabytes) {
  7.   return new DataSize(Math.multiplyExact(gigabytes, BYTES_PER_GB));
  8. }

代码示例来源：origin: spring-projects/spring-framework

  1. /**
  2.  * Obtain a {@link DataSize} representing the specified number of terabytes.
  3.  * @param terabytes the number of terabytes, positive or negative
  4.  * @return a {@link DataSize}
  5.  */
  6. public static DataSize ofTerabytes(long terabytes) {
  7.   return new DataSize(Math.multiplyExact(terabytes, BYTES_PER_TB));
  8. }

代码示例来源：origin: prestodb/presto

  1. public byte[] get()
  2.   {
  3.     byte[] buffer;
  4.     if (bufferPool.isEmpty()) {
  5.       currentSize = min(multiplyExact(currentSize, 2), maxChunkSize);
  6.       buffer = new byte[currentSize];
  7.     }
  8.     else {
  9.       buffer = bufferPool.remove(0);
  10.       currentSize = buffer.length;
  11.     }
  12.     usedBuffers.add(buffer);
  13.     return buffer;
  14.   }
  15. }

代码示例来源：origin: prestodb/presto

  1. public byte[] get()
  2.   {
  3.     byte[] buffer;
  4.     if (bufferPool.isEmpty()) {
  5.       currentSize = min(multiplyExact(currentSize, 2), maxChunkSize);
  6.       buffer = new byte[currentSize];
  7.     }
  8.     else {
  9.       buffer = bufferPool.remove(0);
  10.       currentSize = buffer.length;
  11.     }
  12.     usedBuffers.add(buffer);
  13.     return buffer;
  14.   }
  15. }

代码示例来源：origin: prestodb/presto

  1. public static int toMonths(int year, int months)
  2. {
  3.   try {
  4.     return addExact(multiplyExact(year, 12), months);
  5.   }
  6.   catch (ArithmeticException e) {
  7.     throw new IllegalArgumentException(e);
  8.   }
  9. }

代码示例来源：origin: prestodb/presto

  1. public static int toMonths(int year, int months)
  2. {
  3.   try {
  4.     return addExact(multiplyExact(year, 12), months);
  5.   }
  6.   catch (ArithmeticException e) {
  7.     throw new IllegalArgumentException(e);
  8.   }
  9. }

代码示例来源：origin: neo4j/neo4j

  1. private long calcAverageLengthInSeconds( long months, long days, long seconds )
  2. {
  3.   long daysInSeconds = Math.multiplyExact( days, SECONDS_PER_DAY );
  4.   long monthsInSeconds = Math.multiplyExact( months, AVG_SECONDS_PER_MONTH );
  5.   return Math.addExact( seconds, Math.addExact( daysInSeconds, monthsInSeconds ) );
  6. }

代码示例来源：origin: neo4j/neo4j

  1. /**
  2.  * Overflow safe multiplication of two longs
  3.  *
  4.  * @param a left-hand operand
  5.  * @param b right-hand operand
  6.  * @return a * b
  7.  */
  8. public static LongValue multiply( long a, long b )
  9. {
  10.   return longValue( Math.multiplyExact( a, b ) );
  11. }

代码示例来源：origin: prestodb/presto

  1. public static long toMillis(long day, long hour, long minute, long second, long millis)
  2. {
  3.   try {
  4.     long value = millis;
  5.     value = addExact(value, multiplyExact(day, MILLIS_IN_DAY));
  6.     value = addExact(value, multiplyExact(hour, MILLIS_IN_HOUR));
  7.     value = addExact(value, multiplyExact(minute, MILLIS_IN_MINUTE));
  8.     value = addExact(value, multiplyExact(second, MILLIS_IN_SECOND));
  9.     return value;
  10.   }
  11.   catch (ArithmeticException e) {
  12.     throw new IllegalArgumentException(e);
  13.   }
  14. }

代码示例来源：origin: prestodb/presto

  1. public static long toMillis(long day, long hour, long minute, long second, long millis)
  2. {
  3.   try {
  4.     long value = millis;
  5.     value = addExact(value, multiplyExact(day, MILLIS_IN_DAY));
  6.     value = addExact(value, multiplyExact(hour, MILLIS_IN_HOUR));
  7.     value = addExact(value, multiplyExact(minute, MILLIS_IN_MINUTE));
  8.     value = addExact(value, multiplyExact(second, MILLIS_IN_SECOND));
  9.     return value;
  10.   }
  11.   catch (ArithmeticException e) {
  12.     throw new IllegalArgumentException(e);
  13.   }
  14. }

代码示例来源：origin: spring-projects/spring-framework

  1. /**
  2.  * Obtain a {@link DataSize} representing an amount in the specified {@link DataUnit}.
  3.  * @param amount the amount of the size, measured in terms of the unit,
  4.  * positive or negative
  5.  * @return a corresponding {@link DataSize}
  6.  */
  7. public static DataSize of(long amount, DataUnit unit) {
  8.   Assert.notNull(unit, "Unit must not be null");
  9.   return new DataSize(Math.multiplyExact(amount, unit.size().toBytes()));
  10. }

代码示例来源：origin: prestodb/presto

  1. @UsedByGeneratedCode
  2. public static long tinyintToShortDecimal(long value, long precision, long scale, long tenToScale)
  3. {
  4.   try {
  5.     long decimal = multiplyExact(value, tenToScale);
  6.     if (overflows(decimal, intScale(precision))) {
  7.       throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast TINYINT '%s' to DECIMAL(%s, %s)", value, precision, scale));
  8.     }
  9.     return decimal;
  10.   }
  11.   catch (ArithmeticException e) {
  12.     throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast TINYINT '%s' to DECIMAL(%s, %s)", value, precision, scale));
  13.   }
  14. }

代码示例来源：origin: prestodb/presto

  1. @UsedByGeneratedCode
  2. public static long bigintToShortDecimal(long value, long precision, long scale, long tenToScale)
  3. {
  4.   try {
  5.     long decimal = multiplyExact(value, tenToScale);
  6.     if (overflows(decimal, intScale(precision))) {
  7.       throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast BIGINT '%s' to DECIMAL(%s, %s)", value, precision, scale));
  8.     }
  9.     return decimal;
  10.   }
  11.   catch (ArithmeticException e) {
  12.     throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast BIGINT '%s' to DECIMAL(%s, %s)", value, precision, scale));
  13.   }
  14. }

代码示例来源：origin: prestodb/presto

  1. @UsedByGeneratedCode
  2. public static long smallintToShortDecimal(long value, long precision, long scale, long tenToScale)
  3. {
  4.   try {
  5.     long decimal = multiplyExact(value, tenToScale);
  6.     if (overflows(decimal, intScale(precision))) {
  7.       throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast SMALLINT '%s' to DECIMAL(%s, %s)", value, precision, scale));
  8.     }
  9.     return decimal;
  10.   }
  11.   catch (ArithmeticException e) {
  12.     throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast SMALLINT '%s' to DECIMAL(%s, %s)", value, precision, scale));
  13.   }
  14. }

代码示例来源：origin: prestodb/presto

  1. @UsedByGeneratedCode
  2. public static long integerToShortDecimal(long value, long precision, long scale, long tenToScale)
  3. {
  4.   try {
  5.     long decimal = multiplyExact(value, tenToScale);
  6.     if (overflows(decimal, intScale(precision))) {
  7.       throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast INTEGER '%s' to DECIMAL(%s, %s)", value, precision, scale));
  8.     }
  9.     return decimal;
  10.   }
  11.   catch (ArithmeticException e) {
  12.     throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast INTEGER '%s' to DECIMAL(%s, %s)", value, precision, scale));
  13.   }
  14. }

代码示例来源：origin: prestodb/presto

  1. @ScalarOperator(MULTIPLY)
  2. @SqlType(StandardTypes.BIGINT)
  3. public static long multiply(@SqlType(StandardTypes.BIGINT) long left, @SqlType(StandardTypes.BIGINT) long right)
  4. {
  5.   try {
  6.     return Math.multiplyExact(left, right);
  7.   }
  8.   catch (ArithmeticException e) {
  9.     throw new PrestoException(NUMERIC_VALUE_OUT_OF_RANGE, format("bigint multiplication overflow: %s * %s", left, right), e);
  10.   }
  11. }

代码示例来源：origin: prestodb/presto

  1. @ScalarOperator(MULTIPLY)
  2. @SqlType(StandardTypes.INTEGER)
  3. public static long multiply(@SqlType(StandardTypes.INTEGER) long left, @SqlType(StandardTypes.INTEGER) long right)
  4. {
  5.   try {
  6.     return Math.multiplyExact((int) left, (int) right);
  7.   }
  8.   catch (ArithmeticException e) {
  9.     throw new PrestoException(NUMERIC_VALUE_OUT_OF_RANGE, format("integer multiplication overflow: %s * %s", left, right), e);
  10.   }
  11. }

代码示例来源：origin: neo4j/neo4j

  1. private List<RecordStresser> prepare( Condition condition, PagedFile pagedFile, RecordFormat format )
  2. {
  3.   int maxRecords = Math.multiplyExact( maxPages, format.getRecordsPerPage() );
  4.   TinyLockManager locks = new TinyLockManager();
  5.   List<RecordStresser> recordStressers = new LinkedList<>();
  6.   for ( int threadId = 0; threadId < numberOfThreads; threadId++ )
  7.   {
  8.     recordStressers.add( new RecordStresser( pagedFile, condition, maxRecords, format, threadId, locks ) );
  9.   }
  10.   return recordStressers;
  11. }

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