Question

Trail.java This class represents an individual leg of the ski hill represented in the tree structure. Each node in the tree will hold a Trail object to indicate the terrain or obstacle type within that section of the hill. The types are: ice, trees, rocks, slalom, or a plain snow section with no challenges. The class must have the following private variables: • ID (String) type (String) rank (int) The class must have the following public methods: Trail (constructor) – takes in two String parameters for the ID and type. After assigning these parameter values to the corresponding instance variables, create an if-else structure to assign ranks based on the type using the following system: o ice: 4 o trees: 3 o rocks: 2 o slalom: 1 o anything else: 0 getRank - return the rank value setRank - set the rank value with an input parameter getType - return the type setType - set the type with an input parameter getiD - return the ID setiD - set the ID with an input parameter toString - return the rank as a String .

In Java. How would this class look?

Answer 1

Program: In this program, we create the class Trail, which has three variables - ID(String), type(String), rank(int). The constructor takes two string parameters - ID and type and initializes the class's ID and type. Based on the type value, we assign a value to the variable rank. The mutators and accessors (getters and setters), help in getting the data and setting the data. The toString() mathod returns rank of the class in string format.a

To test our Trail class we create another class TrailDriver which creates an object of class Trail and tests its methods inside its Main() method.

Below is the implementation:

Code:

public class Trail {

    //Class attributes/variables
    private String ID;
    private String type;
    private int rank;

    //Constructor
    public Trail(String ID,String type){
        this.ID = ID;
        this.type = type;

        //Set rank based on type
        if(type.equals("ice")){
            this.rank = 4;
        }
        else if(type.equals("trees")){
            this.rank = 3;
        }
        else if(type.equals("rocks")){
            this.rank = 2;
        }
        else if(type.equals("slalom")){
            this.rank = 1;
        }
        else{
            this.rank = 0;
        }
    }

    //Method to get rank
    public int getRank() {
        return rank;
    }

    //Method to set rank
    public void setRank(int rank) {
        this.rank = rank;
    }

    //Method to get type
    public String getType() {
        return type;
    }

    //Method to set type
    public void setType(String type) {
        this.type = type;
    }

    //Method to get ID
    public String getID() {
        return ID;
    }

    //Method to set ID
    public void setID(String ID) {
        this.ID = ID;
    }

    //toString() method to display rank
    @Override
    public String toString() {
        return "Rank: " + String.valueOf(rank);
    }
}

2. public class Trail { 3 5 //Class attributes/variables private String ID; private String type; private int rank; 6 7 8 9 10 a ET //Constructor public Trail(String ID, String type) { this.ID = ID; this.type = type; 11 12 13 14 15 //Set rank based on type if(type.equals("ice")){ this.rank = 4; 16 ܝܫ 18 else if(type.equals("trees")) { this.rank = 3; 20 } 21 else if(type.equals("rocks")){ this.rank = 2; 22 23 } 24 else if(type.equals("slalom")){ this.rank = 1; 25 26 A } 27 else{ this.rank = 0; 28 29 30 هه 31 32 33 //Method to get rank public int getRank() { return rank; } 35 36 37 38 //Method to set rank public void setRank(int rank) { this.rank = rank; } 39 40 42 //Method to get type public String getType() { return type; } 45

46 47 48 //Method to set type public void setType(String type) { this.type = type; 49 50 } 51 52 53 D //Method to get ID public String getID() { return ID; 54 55 } 56 57 58 E //Method to set ID public void setID(String ID) { this.ID = ID; } 59 60 e 61 63 64 of //toString() method to display rank @Override public String toString() { return "Rank: " + String.valueOf (rank); } 65 66 67 } }

TrailDriver.java:

public class TrailDriver { public static void main(String[] args) { //Create Trail class object and test methods Trail trail = new Trail( ID: "First", type: "trees"); System.out.println(trail.getID); System.out.println(trail.getType()); System.out.println(trail.getRank()); System.out.println(trail); } }

Output:

First trees 3 Rank: 3 Process finished with exit code o |