Jul 23, 2025 · The most common method to convert a string to a primitive int is Integer.parseInt (). It throws a NumberFormatException if the string contains non-numeric characters.

Alternatively, you can use an Ints method from the Guava library, which in combination with Java 8's Optional, makes for a powerful and concise way to convert a string into an int:

parseInt (int i) − This returns an integer, given a string representation of decimal, binary, octal, or hexadecimal (radix equals 10, 2, 8, or 16 respectively) numbers as input.

Dec 15, 2023 · In this article we will show multiple ways of converting a String to an int or Integer.

Jan 16, 2026 · The Integer.parseInt() method in Java is a powerful and widely used tool for converting strings to integers. However, it is important to understand its core concepts, typical usage scenarios, …

Jan 16, 2026 · The Integer.parseInt() method is a static method of the Integer class in Java. It takes a string as an argument and attempts to convert that string into an int primitive type.

Jul 11, 2025 · While operating upon strings, there are times when we need to convert a number represented as a string into an integer type. The method generally used to convert String to Integer …

Feb 11, 2026 · Learn how to convert string to int in Java using Integer.parseInt (), Integer.valueOf (), and handle NumberFormatException. Practical examples with error handling.

Apr 1, 2025 · This tutorial explains the ways to convert Java String to Integer using Integer.parseInt and Integer.ValueOf methods with code examples.

Mar 22, 2026 · This blog post will delve into the core concepts of converting and parsing values to integers in Java, provide typical usage scenarios, highlight common pitfalls, and offer best practices.