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POI stuck with get out from while loop in method
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  1. POI stuck with get out from while loop in method
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    copied!<p>I am writing program that asks user to type seven names of product.</p> <p>what I try to do is if there is duplicate, then repeat the method.</p> <p>I used while loop but I stuck.</p> <p>If I put a,b,c,d,e,f,g at the first time, method ends and moves on to next method.</p> <p>But if I typed a,a,b,c,d,e,f, program repeats same method and even if I type a,b,c,d,e,f,g, it gets in infinite loop.</p> <p>here is my codes.</p> <p>in main....</p> <pre><code> purchasedList.setShopList(); </code></pre> <p>in purchasedList class...</p> <pre><code> public void setShopList() { Scanner keyboard = new Scanner(System.in); // print out description. System.out.println("\n- Only have one entry of any type in the item list."); System.out.println("- The name of items cannot be longer than 16 characters."); System.out.println("\nType seven products."); boolean sameNames = true; while (sameNames == true) { for (int i=0; i&lt;7; i++) { String n = keyboard.nextLine(); name.add(n); name.set(i,name.get(i).toUpperCase()); } sameNames = checkName(); } } // accessor. public ArrayList&lt;String&gt; getShopList () { return name; } // check duplicate. public boolean checkName() { Set&lt;String&gt; uniqueName = new HashSet&lt;String&gt;(); boolean foundName = false; for (int i=0; i&lt;7; i++) { if (!uniqueName.add(name.get(i))) { // check duplicate foundName = true; } } if (foundName == true) { System.out.println("※ There is a duplicate. Try it again."); return true; } else { return false; } } </code></pre> <p>my checkName() method is fine because in my last project it worked.</p> <p>in my last project, I put while loop in main like this</p> <pre><code> public static void main(String[] args) { PurchasedList purchasedList = new PurchasedList(); . . . boolean sameNames = true; boolean tooLong = true; while (sameNames == true || tooLong == true) { System.out.println("\nType seven products."); purchasedList.setShopList(); sameNames = purchasedList.checkName(); tooLong = purchasedList.checkLength(); } </code></pre> <p>but this time, because my professor wants me to make all operations are done within a method, so I try to fix.</p> <p>I tried to solve it by myself in last 8 hours, but I could not get the solution.</p> <p>Please help me.</p> <p>Thank you.</p>
 

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