GA.1

/******************************
 * @file Forest.java
 * Answers for GA.1
 * @author hypesystem
 */

package forest;

/**
 * This class is a forest. With trees.
 * @author hypesystem
 */
public class Forest {

    /**
     * @param args the command line arguments
     */

    private Tree tree1, tree2, tree3;

    /**
     * Constructor creates three trees - it's one huge forest!
     */
    public Forest() {
        tree1 = new Tree(10.0);
        tree2 = new Tree(25.0);
        tree3 = new Tree(40.0);
    }

    /**
     * Method to show the current status of the trees.
     */
    public void show() {
        System.out.println("Hvis et træ falder i en skov, og der ingen er til at høre det...");
        tree1.show();
        tree2.show();
        tree3.show();
        System.out.println("");
    }

    /**
     * Method to make all trees grow (yes, time is the same for all the trees).
     */
    public void growOneYear() {
        tree1.growOneYear();
        tree2.growOneYear();
        tree3.growOneYear();
        System.out.println("Et år er passeret...\n");
    }

    /**
     * Main class to instantiate the application.
     * @param args
     */
    public static void main(String[] args) {
        Forest forest = new Forest();
        forest.show();
        forest.growOneYear();
        forest.show();
    }
}

/******************************
 * @file Tree.java
 * Answers for GA.1
 * @author hypesystem
 */

package forest;

/**
 * This class is a tree, commonly found in forests.
 * @author hypesystem
 */
public class Tree {

    private int age;
    private double height;
    private double growthPct;
    private boolean alive;

    /**
     * Constructor creates a tree. A tree is one year old when it is "born". For some reason.
     * @param growthPct
     */
    public Tree(double growthPct) {
        age = 1;
        alive = true;
        height = 0.25;
        this.growthPct = growthPct;
    }

    /**
     * Method to make the tree grow.
     * It also handles tree-funerals. Trees die when they are 120 years old. Always.
     */
    public void growOneYear() {
        age++;
        if(height < 20) {
            height = height * (1 + growthPct/100);
        }
        if(height > 20) {
            height = 20;
        }
        if(age >= 120) {
            alive = false;
        }
    }

    /**
     * Method to test whether the tree is still alive.
     * @return alive
     */
    public boolean getAlive() {
        return alive;
    }

    /**
     * Shows the current status of the tree in question.
     * Is it alive? If not, how old is it? How tall is it? And last, but not least,
     * if it falls in a forest and nobody's there to hear it -- will it make a sound?
     */
    public void show() {
        if(alive) {
            System.out.println("Er det " + age + " år gammelt, og " + height + " meter højt.");
        }
        else {
            System.out.println("Er det dødt...");
        }
    }

}