Unit 2 (1/23)

• Java Data Types

  • Whole numbers

    • byte - 1 byte

    • short - 2 bytes

    • int - 4 bytes

    • long - 8 bytes

  • Real numbers

    • float - 4 bytes

    • double - 8 bytes

  • Non-numeric

    • Unicode

    • char - 2 bytes

    • boolean - 1 byte

  • Arithmetic operators

    • Highest precedence

      • - (unary negation)

      • * / %

      • + -

    • Associativity

      • - (unary negation) Right to left

      • * / % Left to right

      • + - Left to right

    • Integer division

      • The result of the division operator depends on the type of its operands.

      • If one or both operands have a floating-point type, the result will be a floating-point number, allowing for decimal values in the outcome.

        • 11 / 4 = 2

      • % Modulus (remainder from integer division)

    • Conversion

      • Highest rank to lowest

        • double

        • float

        • long

        • int

        • short

        • byte

  • Math Class

    • PI -

    • POW - returns the value of the first argument raised to the square root

      • area = Math.PI * Math.pow(radius, 2.0)

/**
 * Hayley Pappas
 * 
 * Sphere.java
 * 
 * Given the radius (123.45) of a sphere, calculate & display its volume & surface area.
 * 
 * Input: Sphere's radius
 * 
 * Processing: 1. Assign radius = 123.45;
 * 			   2. Calculate volume & surface area
 * 			   3. Display results
 * 
 * Output: Sphere's volume & surface area
 */
public class Sphere {
	public static void main(String[] args)
	{
		// Variables
		double radius = 123.45, volume, surfaceArea;
		
		// Intro
		System.out.println("\nSphere Geometry Calculator ...");
		
		// Calculate volume & surface area
		volume = (4.0 / 3.0) * Math.PI * Math.pow(radius, 3.0);
		surfaceArea = 4.0 * Math.PI * Math.pow(radius, 2);
		
		// Display results
		System.out.println("\nGiven a sphere with a radius of 123.45");
		System.out.println("\tVolume:\t\t" + volume);
		System.out.println("\tSurface Area:\t" + surfaceArea);
	}

}