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POHow to print out the contents of a HashMap in a certain format?
 

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  1. POHow to print out the contents of a HashMap in a certain format?
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    <p>I'm not entirely sure how I would do this, here is my code:</p> <pre><code>public class PizzaMenu { static Map&lt;String,Pizza&gt; namedPizzas= new HashMap&lt;String,Pizza&gt;(); public static void main(String[] args) { } public static void addItem(String name, Pizza pizza) { namedPizzas.put(name, pizza); } public String printMenu() { /* String menuString=""; for (Every menu item) { //Add name of menu item to menuString with carriage return //Add details of menu item (pizza.getInfo();) to menuString } */ //return menuString } } </code></pre> <p>I would then call <code>System.out.println(PizzaMenu.printMenu())</code> in another class. The sort of format I'm hoping to achieve is as follows:</p> <pre><code>/* * PizzaName * Details * * Next PizzaName in menu * Details * * Next PizzaName in menu * Details * * * */ </code></pre> <p>Am I maybe using the wrong data structure for this type of operation or is there a way of achieving this?</p> <p>Here is the structure of the Pizza class (apologies for poor formatting):</p> <pre><code>public class Pizza { private double cost; private Boolean veg; private PizzaBase base; private List&lt;PizzaTopping&gt; toppings = new ArrayList&lt;PizzaTopping&gt;(); public Pizza(PizzaBase base, PizzaTopping topping) //Constructor for pizza with 1 topping { setBase (base); toppings.add(topping); } public Pizza(PizzaBase base, PizzaTopping topping, PizzaTopping topping2) //Constructor for pizza with 2 toppings { setBase (base); toppings.add(topping); toppings.add(topping2); } public Pizza(PizzaBase base, PizzaTopping topping, PizzaTopping topping2, PizzaTopping topping3) //Constructor for pizza with 3 toppings { setBase (base); toppings.add(topping); toppings.add(topping2); toppings.add(topping3); } public double getCost() { return cost; } public void setCost(double cost) { this.cost = cost; } public PizzaBase getBase() { return base; } public void setBase(PizzaBase base) { this.base = base; } public List&lt;PizzaTopping&gt; getToppings() { return this.toppings; } public String getToppingsInfo() { String toppingInfo = "\n"; PizzaTopping t; for (int i = 0; i&lt;getToppings().size();i++) { t = toppings.get(i); toppingInfo=toppingInfo+t.getInfo(); } return toppingInfo; } public Boolean getVeg() { return veg; } public void setVeg(Boolean veg) { this.veg = veg; } public double calculateCost() { PizzaTopping p; //Loop through all ingredients and add their costs to total cost for (int i = 0; i&lt;toppings.size();i++) { p = toppings.get(i); cost+=p.getCost(); } cost+=base.getCost(); //Add pizza base cost to total cost return cost; } //Check if pizza is vegetarian depending upon its ingredients public Boolean isVeg() { Boolean toppingCheck =true; Boolean baseCheck = true; PizzaTopping t; //Temporary value used to stored toppings being compared in for loop //Check each topping and check if it's suitable for vegetarians for (int i =0; i&lt;toppings.size();i++) { while (toppingCheck == true) { t = toppings.get(i); if (t.getVeg()==false) { toppingCheck = false; } } } //Check base to see if it's suitable for vegetarians if (getBase().getVeg()==false) { baseCheck = false; } //Return value depending on if all ingredients are suitable for vegetarians if (toppingCheck == true &amp;&amp; baseCheck == true) { return true; } else return false; } public String getInfo() { String vegInfo; if (this.isVeg()==true) { vegInfo = "Yes"; } else vegInfo ="No"; return String.format("Toppings:%s\n"+"Base:\n%s"+"\nTotal Cost:\t£%.2f"+"\nSuitable for vegetarians: %s", getToppingsInfo(), getBase().getInfo(), calculateCost(), vegInfo); //Return list of toppings, Total Price, vegetarian } </code></pre> <p>}</p>
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    1. COyou just need to implement your printMenu(). Where exactly is your problem?
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    2. CO@EdgarBoda `for (Every menu item)` I suspect this part. @OP: try `HashMap.keySet().iterator()`
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    3. COWhat's the structure of the Pizza class. Please include its code.
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      1. USAlex Theedom
 

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