How to import math class in java
Deepak
Apr 25, 2024
Before diving into imports and usage, let's first explore Math class key definitions.
- Utility class: A collection of static methods to perform basic numeric operations
- We don’t need to create a Math class object: We can call math class methods directly for example Math.methodName().
- Math class is part of the java.lang package therefore it's automatically available in every Java program.
Math class Key features:
- Range of numeric operations methods: Covers basic arithmetic, trigonometry, exponents, logarithms, rounding, etc.
- Final class: Its method can not be overridden by the child (sub) class.
- Static methods: The math class method can be called using the class name. No need to create objects
Technically the Math class is part of java.lang package, Therefore it is implicitly imported by default. Here's a clear and concise explanation of how to import the Math class in Java:
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Using Fully Qualified Names
Access any method or constant directly using the class name,
Method Math.methodName().
Constant Math.constant
double squareRoot = java.lang.Math.sqrt(36);
double piValue = java.lang.Math.PI;
Importing Math class specific method using import Statement
We can access all static members of class Math using static import. Please check the below example for reference
Import specific members of the Math class:
import static java.lang.Math.sqrt;
double squareRoot = sqrt(36);
Import all static members of the Math class
import static java.lang.Math.*;
double squareRoot = sqrt(36);
double piValue = PI;
