Feb 23, 2014 · Since Math is in the java.lang package, it does not need to be imported. java.lang is the "default package" and everything in it is already implicitly imported for you.

First of all, you don't need to import java.lang.Math. All of the java.lang libraries are already there. Also, you don't need to use the Math library for operations. You use it for things like Math.sin() to find the sine of an angle, or Math.pow() to get the power of one number to another.

Aug 4, 2012 · Firstly, you don't need to import types in java.lang at all. There's an implicit import java.lang.*; already. But importing a type just makes that type available by its simple name; it doesn't mean you can refer to the methods without specifying the type. You have three options: Use a static import for each function you want: import static java.lang.Math.hypot; // etc Use a wildcard static ...

Mar 20, 2011 · If I access a class within a package using fully qualified name, without importing it, whether it saves any memory? Using fully qualified class name : java.lang.Math.sqrt(x); Import package : ...

Jan 15, 2015 · In Java, there are two valid forms of the import declaration: import java.lang.Math; import java.lang.Math.*; In the latter, a wildcard is used. This form is known as a Type-Import-on-Demand declaration, but how is it different from the former? Does it also import the subpackages of java.lang.Math?

The statements import java.lang.Math; and import java.lang.Math.*; will not enable the code to compile and run. These import statements will only allow Math.PI as a reference to the PI constant. My question is: what would be wrong with the import statements only allowing a reference to the PI constant? Would the value be uninitialized and zero?

May 22, 2013 · If you're actually trying to use the standard Java Math package, you need to either get rid of anything named Math.java in your project directory, since that will conflict with the built-in one, or else use a fully-qualified import to access the standard one: import java.lang.Math;.

Feb 11, 2015 · Math.abs() to directly (without any import statement) call the abs() method. But this only works for the static method in java.lang package, since they are imported by default.

Sep 26, 2016 · As Brian says, use Math.abs(). Or, you can import the methods statically: import static java.lang.Math.*; This will allow you to use just abs() (and all other static methods from the Math class) without prefixing them with Math.

May 5, 2011 · I would like to get a random value between 1 to 50 in Java. How may I do that with the help of Math.random();? How do I bound the values that Math.random() returns?