How to Print an Array in Java?

While working with Java, we often need to display the elements of an array for debugging or output purposes. By printing the elements of an array, we can validate data, ensure the calculations are correct, and debug the errors. Java provides multiple methods to print an array.

In this blog, we will learn how we can print an array in Java using multiple methods.

Table of Contents:

• Methods to Print an Array in Java
  • Method 1: Using for Loop in Java
  • Method 2: Using while Loop in Java
  • Method 3: Using for-each Loop in Java
  • Method 4: Using Arrays.toString() Method in Java
  • Method 5: Using Arrays.deepToString() Method in Java
  • Method 6: Using Arrays.asList() Method in Java
  • Method 7: Using Java Iterator Interface in Java
  • Method 8: Using Java Stream API in Java
• Conclusion

Methods to Print an Array in Java

An array in Java is a data structure that is used to store multiple values of the same data type in a single variable name. Let’s explore all the different methods to print an array in Java:

Note: We have discussed multiple methods to print an array in Java, but the simplest and widely used method is for loop.

Method 1: Using for Loop to Print an Array in Java

To print an array in Java, we use a for loop. This is the simplest method for printing the elements of an array.

Example:

Output:

Method 2: Using while Loop to Print an Array in Java

A while loop can also be used to print an array in Java. The while loop takes a condition as its argument, and as long as the condition is true, it continues executing the code written inside the loop.

Example:

Output:

Method 3: Using for-each Loop to Print an Array in Java

The for-each loop is used to iterate through an array with a more concise syntax. The loop automatically iterates through all elements in the array, and we don’t need to maintain the index of the array.

Example:

Output:

Method 4: Using Arrays.toString() Method to Print an Array in Java

Arrays.toString() is a built-in method in the java.util.Arrays class that converts an array into a readable string. It automatically formats the array, separating elements with commas and enclosing them in square brackets.

Example:

Output:

Method 5: Using Arrays.deepToString() Method to Print an Array in Java

Arrays.deepToString() is used for printing the multidimensional array. It works similarly to Arrays.toString(), but it recursively converts the elements of nested arrays into a readable string.

Example:

Code:

Method 6: Using Arrays.asList() Method to Print an Array in Java

Arrays.asList() converts an array into a fixed-size list. While it allows you to use List methods like toString(), it does not support resizing (e.g., adding or removing elements).

Example:

Output:

Method 7: Using Java Iterator Interface to Print an Array in Java

The Iterator interface in Java is a part of the Java Collections Framework that allows you to traverse the elements of a collection (such as a List) one by one.

Example:

Output:

Method 8: Using Java Stream API to Print an Array in Java

The Java Stream API offers a modern way to work with collections and arrays. By using Streams with forEach(), you can easily print the elements of an array.

1. Java stream() Method

The stream() method is part of the Java Stream API. It is used to convert a collection or array into a stream for processing data in a functional style.

Syntax:

Arrays.stream(array)

2. Java forEach() Method

The forEach() method is used to iterate over elements of a collection or a stream, and in each iteration, we can print the elements of the stream.

Syntax:

collection.forEach(action);
stream.forEach(action);

 Where,

• A collection is any List, Set, or other Collection.
• A stream is a stream of data.
• Action is a lambda expression or method reference that specifies what to do with each element.

Example:

Output: