Tjungblut math: The mathematical function design principles in the Java class library

The mathematical function design principles in the Java class library Overview: Mathematical functions play an important role in the Java library, providing developers with a wide range of mathematical computing and processing functions.When designing and implementing these mathematical functions, follow some basic principles to ensure the reliability, efficiency and ease of use of the function.This article will introduce several important principles that should be followed when designing mathematical functions in the Java library, and provide corresponding code examples. 1. The function is clear and clear. Mathematical functions should be clear and clear in functional, and users can accurately understand the purpose and expectations of the calling functions.The function name should be concise and can accurately describe the operations done by the function.Code annotation should also provide detailed descriptions of functions, including parameters, return values and possible abnormal conditions.The following is a function example to calculate the square root: /** * Calculate the given value of the given value * @param X to calculate the value of the square root, must be a non -negative number * @Return square root value * @throws illegalargumentexception If X is negative, throw an exception */ public static double sqrt(double x) throws IllegalArgumentException { if (x < 0) { Throw New iLlegalargumentexception ("input value must be non -negative"); } return Math.sqrt(x); } 2. Principle of Exception Handling: Mathematical functions should be able to handle possible abnormal conditions and give meaningful abnormal information.For example, when the input value exceeds the definition domain of the function, IllegalargumentedException should be thrown and explained with meaningful error messages.This can help users find problems quickly, and they can more easily locate the causes of problems when errors occur. 3. Parameter verification Principle of Argument Validation: Mathematical functions should verify the parameters to ensure that it meets the expected requirements of the function.Verification parameters can include check whether the parameter is NULL, whether the value range of the parameter is reasonable, etc.By verifying parameters inside the function, unnecessary errors and abnormalities can be avoided.The following is a function example that verifies whether the input parameter is NULL and non -empty function: /** * Calculate the average value of the two values * @param A's first value * @param B second value * @Return average * @throws illegalargumentexception If A or B is NULL, throw an exception */ public static double average(Double a, Double b) throws IllegalArgumentException { Objects.requirenonnull (a, "The first value cannot be empty"); Objects.requirenonnull (b, "The second value cannot be empty"); return (a + b) / 2; } 4. Efficiency and performance Principle of Efficience and Performance: The design of mathematical functions should take into account the requirements of efficiency and performance.Try to avoid unnecessary calculation and repeated operations to improve the execution efficiency of the function.For example, when a large amount of calculation is performed, you can choose to use basic data types instead of packaging types to reduce memory overhead and operating time. Summarize: When designing mathematical functions in the Java library, the principles of clear function, exception processing, parameter verification, and efficiency performance should be followed.Through reasonable design and implementation, mathematical functions can provide reliable, efficient and easy -to -use mathematical computing and processing functions.The above principles and code examples can help developers design excellent mathematical functions and improve the quality and performance of the entire application.