How to Iterate Over a List in Java - Step by Step Examples

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How to Iterate Over a List in Java ?

Answer

To iterate over a list in Java, you can use various methods such as a for loop, an enhanced for loop, or an iterator.

✐ Examples

1 Iterate Over a List Using a For Loop

In this example,

We create a list named numbers and initialize it with some integer values.
We use a standard for loop to iterate over the list. The loop runs from index 0 to the length of the list minus one.
Inside the loop, we use the get method of the list to access each element by its index.
We print each element to the standard output.

Java Program

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = new ArrayList<>();
        numbers.add(1);
        numbers.add(2);
        numbers.add(3);
        numbers.add(4);
        numbers.add(5);
        for (int i = 0; i < numbers.size(); i++) {
            System.out.println("Element at index " + i + ": " + numbers.get(i));
        }
    }
}

Output

Element at index 0: 1
Element at index 1: 2
Element at index 2: 3
Element at index 3: 4
Element at index 4: 5

2 Iterate Over a List Using an Enhanced For Loop

In this example,

We create a list named colors and initialize it with some string values.
We use an enhanced for loop (also known as a for-each loop) to iterate over the list. The loop variable color represents each element in the list during each iteration.
We print each element to the standard output.

Java Program

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> colors = new ArrayList<>();
        colors.add("Red");
        colors.add("Green");
        colors.add("Blue");
        colors.add("Yellow");
        colors.add("Orange");
        for (String color : colors) {
            System.out.println("Color: " + color);
        }
    }
}

Output

Color: Red
Color: Green
Color: Blue
Color: Yellow
Color: Orange

Summary

In this tutorial, we learned How to Iterate Over a List in Java language with well detailed examples.

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How to Iterate Over a List in Java - Step by Step Examples

How to Iterate Over a List in Java ?

Answer

✐ Examples

1 Iterate Over a List Using a For Loop

Java Program

Output

2 Iterate Over a List Using an Enhanced For Loop

Java Program

Output

Summary

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