/**
 * This simple class is used to illustrate the usage of static variables and methods
 * as well as the "this" keyword.
 * 
 * @author alchambers
 * @version sp17
 */
public class SimpleClass{
    private static int staticVariable; // a static variable
    private int instanceVariable; // an instance variable
    
    /**
     * Creates a new object of type SimpleClass
     */
    public SimpleClass(){
        instanceVariable = 100;
        staticVariable = 100;
        System.out.println("Memory address of this object: " + this);
    }
    
    /**
     * Returns the value of the instance variable
     * @return The value of the instance variable
     */
    public int getInstanceVariable(){
        return instanceVariable;
    }
    
    /**
     * Sets the value of the instance variable
     * @param newValue The new value of the instance variable
     */
    public void setInstanceVariable(int newValue){
        instanceVariable = newValue;
    }
    
    /**
     * Returns the value of the static variable
     * @return The value of the static variable
     */
    public int getStaticVariable(){
        return staticVariable;
    }
    
    /**
     * Sets the value of the static variable
     * @param newValue The new value of the static variable
     */
    public void setStaticVariable(int newValue){
        staticVariable = newValue;
    }
    
    /**
     * A static method is not associated with any object (it's associated with
     * the class). Thus, a static method cannot reference any non-static variables
     * or methods.
     */
    public static void staticMethod(){
        // Uncomment the following lines to trigger errors
        // instanceVariable = -1;
        // getInstanceVariable();
        // System.out.println("Memory address of this object: " + this);
    }    
    
    /**
     * A normal (i.e. non-static) method *can* reference any static variables
     */
    public static void normalMethod(){
        staticVariable = -1;
    }
}