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Java How To Loop Through an ArrayList

For Loop Nested Loops For-Each Loop Real-Life Examples Code Challenge Java Break/Continue Java Arrays

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Java Loop Through an Array

You can loop through the array elements with the for loop, and use the length property to specify how many times the loop should run.

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w3schools.com › java › ref_arraylist_foreach.asp

Java ArrayList forEach() Method

For Loop Nested Loops For-Each Loop Real-Life Examples Code Challenge Java Break/Continue Java Arrays

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GCD Check Prime Number ArrayList Loop HashMap Loop Loop Through an Enum ... assert abstract boolean break byte case catch char class continue default do double else enum exports extends final finally float for if implements import instanceof ...

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runestone.academy › ns › books › published › csawesome › Unit7-ArrayList › topic-7-3-arraylist-loops.html

7.3. Traversing ArrayLists with Loops — CSAwesome v1

You can also use a while loop or ... of using the index operator [] to access elements, you use the get(index) method to get the value at the index and set(index,value) to set the element at an index to a new value....

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Java For-Each Loop

The for-each loop is simpler and more readable than a regular for loop, since you don't need a counter (like i < array.length). The following example prints all elements in the cars array: String[] cars = {"Volvo", "BMW", "Ford", "Mazda"}; for (String car : cars) { System.out.println(car); } ... Here is a similar example with numbers.

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Java ArrayList Reference

For Loop Nested Loops For-Each Loop Real-Life Examples Code Challenge Java Break/Continue Java Arrays

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How Tos Add Two Numbers Swap Two Variables Even or Odd Number Reverse a Number Positive or Negative Square Root Area of Rectangle Celsius to Fahrenheit Sum of Digits Check Armstrong Num Random Number Count Words Count Vowels in a String Remove Vowels Count Digits in a String Reverse a String Palindrome Check Check Anagram Convert String to Array Remove Whitespace Count Character Frequency Sum of Array Elements Find Array Average Sort an Array Find Smallest Element Find Largest Element Second Largest Array Min and Max Array Merge Two Arrays Remove Duplicates Find Duplicates Shuffle an Array Factorial of a Number Fibonacci Sequence Find GCD Check Prime Number ArrayList Loop HashMap Loop Loop Through an Enum

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Java ArrayList iterator() Method

GCD Check Prime Number ArrayList Loop HashMap Loop Loop Through an Enum ... assert abstract boolean break byte case catch char class continue default do double else enum exports extends final finally float for if implements import instanceof ...

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geeksforgeeks.org › java › iterating-arraylists-java

Iterating over ArrayLists in Java - GeeksforGeeks

import java.util.*; class GFG { // Main driver method public static void main(String[] args) { // Creating and initializing the ArrayList // Declaring object of integer type List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8); // Iterating using for loop for (int i = 0; i < numbers.size(); i++) // Printing and display the elements in ArrayList System.out.print(numbers.get(i) + " "); } }

Published January 19, 2026

programiz.com › java-programming › examples › iterate-over-arraylist

Java Program to Iterate over an ArrayList

Here, we have used the for-each loop to iterate over the ArrayList and print each element.

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Java ArrayList toArray() Method

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w3schools.com › cs › cs_arrays_loop.php

C# Loop Through an Array

Classes and Objects Multiple Objects ... C# Files C# Exceptions ... You can loop through the array elements with the for loop, and use the Length property to specify how many times the loop should run....

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GCD Check Prime Number ArrayList Loop HashMap Loop Loop Through an Enum ... assert abstract boolean break byte case catch char class continue default do double else enum exports extends final finally float for if implements import instanceof ...

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Java ArrayList get() Method

GCD Check Prime Number ArrayList Loop HashMap Loop Loop Through an Enum ... assert abstract boolean break byte case catch char class continue default do double else enum exports extends final finally float for if implements import instanceof ...

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runestone.academy › ns › books › published › csjava › Unit8-ArrayList › topic-8-3-arraylist-loops.html

8.3. Traversing ArrayLists with Loops — CS Java

You can also use a while or for loop to process list elements using the index. The ArrayList index starts at 0 just like arrays, but instead of using the square brackets [] to access elements, you use the get(index) to get the value at the index and set(index,value) to set the element at an ...

stackoverflow.com › questions › 12970484 › java-for-loop-with-an-arraylist

Java for loop with an ArrayList - Stack Overflow

I think fundamentally the code is correct. I would check your inputs and make sure they're really what you think.

I would perhaps rewrite your loop as:

for (String s : contain) {
   if (s.contains(code)) {
      // found it
   }
}

to make use of the object iterators (the above assumes you have an ArrayList<String>). And perhaps rename contain. It's not very clear what this is.

The code is correct assuming List of strings. I have not modified any of your source code just to give you idea that it works fine.

    List<String> contain = new ArrayList<String>();
    contain.add("HPDH-1,001, Check-out date: 7/7/7");
    contain.add("JTI-1,001, Check-out date: 7/7/7");
    String code = "JTI-1 ";
    for (int i = 0; i < contain.size(); i++) {
        if (contain.get(i).contains(code.trim())) {<---Use trim it is possible that code may have extra space
            System.out.println(contain.get(i));
        }
    }

beginnersbook.com › 2013 › 12 › how-to-loop-arraylist-in-java

How to loop ArrayList in Java

You can also loop through an ArrayList elements using stream. import java.util.ArrayList; public class ArrayListExample { public static void main(String[] args) { ArrayList<String> names = new ArrayList<>(); names.add("Chaitanya"); names.add("Rahul"); names.add("Aditya"); names.stream().fo...

w3schools.com › java › java_challenges_for_loop.asp

Java For Loop Code Challenge

How Tos Add Two Numbers Swap Two Variables Even or Odd Number Reverse a Number Positive or Negative Square Root Area of Rectangle Celsius to Fahrenheit Sum of Digits Check Armstrong Num Random Number Count Words Count Vowels in a String Remove Vowels Count Digits in a String Reverse a String Palindrome Check Check Anagram Convert String to Array Remove Whitespace Count Character Frequency Sum of Array Elements Find Array Average Sort an Array Find Smallest Element Find Largest Element Second Largest Array Min and Max Array Merge Two Arrays Remove Duplicates Find Duplicates Shuffle an Array Factorial of a Number Fibonacci Sequence Find GCD Check Prime Number ArrayList Loop HashMap Loop Loop Through an Enum

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Looping with ArrayLists | Springer Nature Link

Using a for loop with an ArrayList is pretty straightforward, but you need to work with two particular methods of the ArrayList class in order to loop through all of the elements.