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Java Math Class

Java's Math class provides many useful methods to perform mathematical tasks. You don't need to create an object of the Math class to use its methods; they are all static.

Math.max() and Math.min()

The Math.max(x, y) method can be used to find the highest value of x and y, and Math.min(x, y) can be used to find the lowest value.

Max and Min Example

public class Main {
  public static void main(String[] args) {
    System.out.println(Math.max(5, 10));  // Outputs 10
    System.out.println(Math.min(5, 10));  // Outputs 5
  }
}

Math.sqrt() and Math.abs()

Sqrt and Abs Example

public class Main {
  public static void main(String[] args) {
    System.out.println(Math.sqrt(64));    // Outputs 8.0
    System.out.println(Math.abs(-4.7));   // Outputs 4.7
  }
}

Math.random()

Math.random() returns a random double number between 0.0 (inclusive) and 1.0 (exclusive).

To get a random number within a specific range, you can use a formula. For example, to get a random integer between 0 and 100:

Random Number Example

public class Main {
  public static void main(String[] args) {
    // A random number between 0.0 and 1.0
    System.out.println(Math.random());
    // A random integer between 0 and 100
    int randomNumber = (int)(Math.random() * 101); // 0 to 100
    System.out.println(randomNumber);
  }
}

Other Math Methods

Method Description
Math.round(x) Rounds a floating-point number to the nearest integer.
Math.ceil(x) Rounds a number UP to the nearest integer.
Math.floor(x) Rounds a number DOWN to the nearest integer.
Math.pow(x, y) Returns the value of x to the power of y.
Math.PI A constant representing the value of PI.
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