logo
down
shadow

ItemArray.checklist.add() not appending string to ArrayList


ItemArray.checklist.add() not appending string to ArrayList

Content Index :

ItemArray.checklist.add() not appending string to ArrayList
Tag : java , By : user123284
Date : November 28 2020, 03:01 PM

I hope this helps you . You create multiple instances of ItemArray.
Both in AddItem() and ShowItems(). So you never use the same instance in these methods.
 Items ItemArray = new Items();
class ShopAssist {

    private Items items = new Items();
    ...

    public static void main(String[] args){

      ShopAssist shopAssist = new ShopAssist();

      while (true) {
        System.out.println("( Add | Remove | Show | Exit )");
        System.out.print(">");
        Scanner menuinput = new Scanner(System.in);
        String choice = menuinput.nextLine();

        if (choice.equals("Add")) {
          shopAssist.addItem();
        } 
        else if (choice.equals("Remove")) {
          shopAssist.removeItem();
        } 
        else if (choice.equals("Show")) {
          shopAssist.showItems();
        }
      }
    }

    public void addItem(){
        ...
    }
    ...
    public void showItems(){          
        System.out.println("ShowItems Method");
        System.out.println(items.checklist);
    }
    ...
}

Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

HashMap<String, ArrayList>, Appending ArrayList with new values based on the Key


Tag : java , By : MikeG
Date : March 29 2020, 07:55 AM
this one helps. It sounds like you need a MultiMap, which is provided by Google's great Guava libraries:

appending an array of string to arraylist of type Integer in Java


Tag : java , By : Helpful Dude
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I have an ArrayList called nodes. I want to assign elements from array[] to elements in ArrayList. Such that 1st element in arraylist will have first element in array as its property.. and so on. However, there are only 6 elements in array and thus for 7th element its again first element from array[]. Array is of type Integer. , Sounds like you need a Node class with a Map to store preferences.
class Node {

    Integer id;
    Map<String, Integer> interestPreferences;

    public Node(Integer id) {
        this.id = id;
        this.interestPreferences = new HashMap<String, Integer>();
    }

    void setPreference(String key, Integer value) {
        interestPreferences.put(key, value);
    }

    Interest getPreference(String key) {
        return interestPreferences.get(key);
    }
}
public static List<Node> nodes = new ArrayList<Node>();
public static String[] Interest = new String[] {"I1","I2","I3","I4","I5","I6"};

public static void main(String[] args){
    System.out.println("Enter number of nodes");
    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    for(int i=0;i<=n;i++) {
        Node node = new Node(i);
        node.setPreference("I1", 10);
        node.setPreference("I2", 8);
        //....
        node.setPreference("I6", 2);
        nodes.add(node);
    }

    System.out.println(nodes);
}

Which would create more memory footprint, appending on StringBuilder or adding ArrayList<String>?


Tag : java , By : user165781
Date : March 29 2020, 07:55 AM
I wish did fix the issue. StringBuilder is more efficient in terms of memory in most cases.
With ArrayList you keep all of the Strings in memory, with StringBuilder you keep only the characters in a char array, because the actual Strings will be GCed. Thus, if you have 10000 Strings you have a difference of memory of 10000 * difference in memory between a String and it's corresponding characters (which are objects in String class itself, like the lock, length, hash and eventually others).

Arraylist of String arrays not appending?


Tag : java , By : user183275
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I have created 3 arraylist which have a array of another type: , With this code
Log.e("tttttt", Arrays.toString(arrayListString.get(0)));
Log.e("ppppppp", Arrays.toString(arrayListInt.get(0)));
Log.e("mmmmmm", Arrays.toString(arrayListInt.get(1)));
Log.e("dddddd", Arrays.toString(arrayListInt.get(2)));
Log.e("iiiiii", Arrays.toString(arrayListString.get(1)));
Log.e("tttttt", Arrays.toString(arrayListString.get(2)));
public class ApiData {
    public String[] title, image;
    int[] price, mrp, discount;
}
private List<ApiData> arrayListData = new ArrayList<ApiData>();
@Override
public void run() {
    ApiData data = new ApiData();
    data.title = Arrays.copyOf(product.getTitle(), product.getTitle().length);
    ...

    arrayListData.add(data);

ItemArray to string with format is invalid


Tag : chash , By : RyanMcG
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , The ItemArray is an object[]. Object.ToString has no parameter. I guess it's actually a currency value. Then use the DataRow.Field extension method to cast it:
foreach (DataRow dr in ret.Rows)
{
    DataRow row = dt.Rows.Add();
    for (int j = 0; j < dr.ItemArray.Length; j++)
    {
        if (j == 14) 
            row[j] = dr.Field<decimal>(j).ToString("C2"); // use the correct type
        else 
            row[j] = dr.ItemArray[j];
    }
}
foreach (DataRow dr in ret.Rows)
{
    DataRow row = dt.Rows.Add();
    foreach(DataColumn col in ret.Columns)
    {
        if (col.Ordinal == 14)
            row.SetField(col.Ordinal, dr.Field<decimal>(col).ToString("C2")); // use the correct type
        else
            row.SetField(col.Ordinal, dr[col]);
    }
}
Related Posts Related QUESTIONS :
  • How to split a string to non empty words if it might include a separator like tab on first place
  • Supplier<Sequence<String>> cannot be iterated more than once
  • Why there is only one thread can actually started in @PostConstruct method?
  • Manage CompletionStage inside of Netty handler
  • Url Problem while Developing on Localhost and deploy on Remote Virtual Server
  • How to identify the missing type id in Jackson error?
  • android data binding error: cannot find symbol
  • Spring Boot application with a jar dependency does not run after maven build
  • Spring Data JPA query , filter ? search engine ? JPQL?
  • Why LiveData returns null in ViewModel?
  • what this line of code mean....new URLClassLoader(new URL[0],getClass().getClassLoader());
  • Why do need to use new Random() instead of just Random Randomnum?
  • I want to access zk components from the java file
  • How do I cast FieldValue.serverTimestamp() to Kotlin/Java Date Class
  • Insertion Sort Double Array with User Input - JAVA
  • Creating 2 dimesional array with user input and find sum of specific columns
  • can not get Advertising ID Provider in android
  • Convert list of Objects to map of properties
  • How to represent an undirected weighted graph in java
  • Return values as array from collection
  • ByteBuddy generic method return cast to concrete type
  • ImageView hides the round corners of the parent
  • Is there a way to find setter method by its getter method or vice versa in a class?
  • Get aggregated list of properties from list of Objects(Java 8)
  • Unable to find a document in Mongodb where exact date match in java
  • UsernamePasswordAuthenticationFilter skips success handler
  • Use Java filter on stream with in a stream filter
  • Default Login not successful in spring boot 2.1.7
  • Adding key value pairs from a file to a Hashmap
  • Rub regex: matching a char except when after by another char
  • Convert Base64 String to String Array
  • Escape Unicode Character 'POPCORN' to HTML Entity
  • An empty JSON field which is a boolean/nullable field in Java model, is getting converted as null
  • Mongo java driver cannot find public constructor for interface
  • How to unit test writing a file to AWS Lambda output stream?
  • How to make a GitHub GraphQL API Call from Java
  • What's the difference between @ComponentScan and @Bean in a context configuration?
  • Expected class or package adding a view using a class
  • can be delete of a element in a static array be O(1)?
  • Instance variable heap or stack ? ( with specific example)
  • Assert progress of ProgressBar in Espresso test
  • How to detect if gson.fromjson() has excess elements
  • I cant generate the proper code to select the a specific filter on a BI dashboard I am working on
  • How to Inject Dependencies into a Servlet Filter with Spring Boot Filter Registration Bean?
  • Thrift types as a Generic
  • Effective algorithm to random 4 unique integers less than a big max such as 100_000
  • Combining or and negation in Java regex?
  • Unable to instantiate default tuplizer Exception
  • Multi-tenant migration to work with quarkus
  • Ignite persisting a Set: Cannot find metadata for object with compact footer
  • Maven cannot resolve Jacob dependency using eclipse
  • testcontainers oracle database container starts before database user is created
  • Launching two spring boot apps in integration test
  • Is there a way to add a HashMap's value that is a integer array into a ArrayList?
  • Is there any way that I can get a parameter in paintComponent?
  • Empty stack with one recursive method and one iterative method
  • What's the behavior of onBackpressureBuffer in RxJava2
  • Java regex can only use 1 quantifier in a lookback (need 2)
  • How to fix error in native query : it is showing syntax error near or at
  • How to retrieve nested object from a document and display it in FirestoreRecyclerOptions?
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com