Converting a String to an Integer Exception in Java

When working with strings and integers in Java, there are times when you need to convert a string representation of an integer into its corresponding integer value. This is often done using the `String.valueOf()` method or the '+' operator. In this article, we will explore both methods and their advantages.

Using String.valueOf() Method

The `String.valueOf()` method is a static utility method that converts an integer value to a string. It is overloaded to accept almost all primitive types, including char, double, float, and others. This method can be used to convert any integer value into a string.

Here's an example of converting an integer to a string using the `String.valueOf()` method:

```

int myInt = 10;

String myStr = String.valueOf(myInt);

System.out.println(myStr); // Output: '10'

```

One of the benefits of using `String.valueOf()` is that it provides a cached set of values, which can improve performance. Additionally, it avoids creating a `StringBuilder` object, reducing memory allocation.

Using '+' Operator

Another way to convert an integer to a string in Java is by using the '+' operator. This method is simple and easy to use:

```

int myInt = 10;

String myStr = '' + myInt;

System.out.println(myStr); // Output: '10'

```

When using the '+' operator, the compiler uses either a `StringBuffer` or a `StringBuilder` object to concatenate strings. This method is simple and easy to use, but it may not be as efficient as using `String.valueOf()`.

In this article, we have seen two methods for converting an integer value into a string in Java: using the `String.valueOf()` method and the '+' operator. Both methods are useful and can be used depending on your specific requirements. When choosing between these methods, consider factors such as performance, memory allocation, and ease of use.

References

* 'Java Tutorial: Converting String to Integer'(https://www.javatutorial.net/java-convert-string-to-int.php)

* 'JavaDoc: String.valueOf(int)'(https://docs.oracle.com/javase/8/docs/api/java/lang/String.html#valueOf-int-)

Java convert string to int exception