How do I create ArrayList of Objects (string car model, int count, string percentage) in a loop?

how to count the number of occurrences of an element in a arraylist in java
how to count number of elements in a list in java
how to count duplicate elements in arraylist in java
java 8 count occurrences in list
arraylist java
java map count occurrences
how to count duplicate elements in array in java
arraylist count java

So I need to create Object for example called Car containing - String car model - int count - String percentage

After getting this data how do I put all Car Objects into for-loop of Objects to get Arraylist of all Car objects?

You could do:

List<Car> carList = new ArrayList();
for(int i = 0; i < numberOfDesiredCars; i++){
   Car c = new Car(arguments);

Count occurrences of elements of list in Java, How do you count the number of elements in an ArrayList? Java ArrayList. The ArrayList class is a resizable array, which can be found in the java.util package.. The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove elements to/from an array, you have to create a new one).

I don't understand what the question is? Can you be a little more specific? Are you saying you want all your objects into a list? If so, you'd either add each one individually or you could do

        carList.addAll(Arrays.asList(carObject1, carObject2, and so on));

I don't know what you mean about put them all into a for loop after that. What's the for loop being used for? Are you just wanting to print all of them? If so, you wouldn't need a for loop to print the entire list, just if you wanted to print ones that meet only a certain criteria.

How to call an Arraylist method?, the occurrence of object o in the collection c. ArrayList<String> arlist = new ArrayList<String>( ); In above syntax, list is of “String” type, so the elements are that going to be added to this list will be string type. The type decide

You will need to provide some code for us to help you directly, but to do what you say, it will be best to generally have two separate files.

In one file:

public class Car{
    private String model;  //instantaneous variables 
    private int count;
    private String percentage;

public Car(){   //default constructor
    model = "whateverModelName";
    count = 123;
    percentage = "75";

public Car(model,count,percentage){  //custom Constructor with parameters

Then in another file:


public class carRunner{
    public int numOfObjects = 0;
    public static void main(String[] args){

        //Creates Car objects and initializes object name to "car1", "car2", etc.
        //Add code that adds 1 to numOfObjects each time an object is created
        getArrayList();  //calls getArrayList method

    public static void getArrayList(){
    //creates and initializes your arrays to the proper sizes
    String[] model = new String[numOfObjects];
    String[] percentage = new String[numOfObjects];
    int[] count = new int[numOfObjects];

    for (i=1;i<=numOfObjects;i++){
        model[i] = car + i + .model;  //not sure how to do this actually, if someone can help write this to get the different variables from different objects

    for (i=1;i<=numOfObjects;i++){
        percentage[i] = car + i + .percentage;  //not sure how to do this actually, if someone can help write this to get the different variables from different objects

    for (i=1;i<=numOfObjects;i++){
        count[i] = car + i + .count;  //not sure how to do this actually, if someone can help write this to get the different variables from different objects



Different Approaches to Sorting Elements of an ArrayList in Java , public static void countFrequencies(ArrayList<String> list) To count occurrences of elements of ArrayList, we create HashSet and add all We use Collections.frequency(Collection c, Object o) to count the occurrence of object o in the collection c. auto. Most popular in Java. Difference between a Java Application and a  I have written a program where I have N strings and Q queries that are also strings. The goal is to determine how many times each query appears in the N strings. This is my code: import java.util.

How To Sort An ArrayList In Java With Examples?, To sort an ArrayList, we use sort() method of Collections class. In this example, we are sorting an ArrayList of strings using first form of public Student( int id, String name, int percentage) //Creating an ArrayList of Student objects This Comparator sorts the Student objects based on their percentage. private ArrayList<String[]> addresses = new ArrayList<String[3]> (); This does not seem to work. Whats the easiest way of storing multiple addresses with 3 fields per address in an array without creating a separate class for it? java arrays arraylist. improve this question. edited Nov 26 '18 at 7:58. Micha Wiedenmann. 70 silver badges.

Chapter 7: Arrays, Declare, Initialize, and Use Arrays; Use Loops for Array Traversal; Pass Arrays as Parameters Like Strings, arrays use zero-based indexing, that is, array indexes start with 0. The following displays the indexes and values in an array with 10 elements of type int. Since arrays are objects, we create arrays using new. Example Programming Activity 9-2 output Program Start Choose your activity Count Model Frequency Model BMW Miles driven 00alons orgas: 0 Model Feman Miles driven 10D oallons orgas: 500.0 Model Jeep Miles driven: 1000 Gallons of gas: 90.0 Model Femari Mies diven 100 allons of gas 30 Model BMWMiles driven 4000 Gallons of gas 2000 Model Ferran Miles driven 1000 Galons of gas 50.0 Navigator emptys

Java ArrayList - ArrayList methods, sorting, traversing, Java ArrayList tutorial shows how to work with ArrayList collection in Java. Java ArrayList adding single items restricts the elements to this data type; in our case, we have a list of strings. In the example, we traverse an array list of integers with for loops, while loop, iterator, and forEach() construct. 6) int indexOf(Object o): Gives the index of the object o. If the element is not found in the list then this method returns the value -1. int pos = obj.indexOf("Tom"); This would give the index (position) of the string Tom in the list. 7) Object get(int index): It returns the object of list which is present at the specified index.

  • Add the code you have tried so far.
  • Don't answer if you don't fully understand the question, instead leave a comment to get further clarification.
  • It wouldn't let me leave a comment due to the reputation score.