In Java, there are various inputs and values that need to be converted into an integer in order to produce an output. If you want to convert a string (a variable that stores a sequence of characters) into an integer, follow our guide. There are two ways to achieve this:
### Converting a String to the int data type
To perform this type of conversion, you can use the **static method** `Integer.parseInt(String s)`. `ParseInt` returns a simple `int` entity. The string should only consist of *digits* and may contain only a *plus* or *minus* sign at the beginning.
Example:
“`
String number = “123”;
int convertedNumber = Integer.parseInt(number);
System.out.println(convertedNumber); // Output: 123
“`
If the string contains any illegal characters, an **exception** will be thrown. **Whitespace**, **separator**, **dot**, or **comma** characters are **not allowed**.
### Converting a String to an Integer object
To perform this conversion, you can use the **static method** `Integer.valueOf(String s)`. A static method is a method that belongs to a class definition. It returns a new instance of `java.lang.Integer`.
Example:
“`
String number = “123”;
Integer convertedNumber = Integer.valueOf(number);
System.out.println(convertedNumber); // Output: 123
“`
These methods will help you convert strings to integers and enable you to process the data accordingly for tech, cryptocurrency, trading, and finance purposes.
