How Can I Easily Convert Comma-Separated Strings to Lists in Java?

Effortlessly Convert Comma-Separated Strings to Lists

Java offers a convenient method to transform comma-delimited strings into List objects. This eliminates the need for custom code and simplifies the process.

Suppose we have a string like "item1 , item2 , item3". To convert it into a List of strings, we can use the following code snippet:

String commaSeparated = "item1 , item2 , item3";
List<String> items = Arrays.asList(str.split("\s*,\s*"));

The heart of this code is the split() method. It divides the string into individual substrings using the specified delimiter. In our case, the delimiter is a comma with optional whitespace on both sides.

The resulting substrings are then stored in an array, which is then wrapped into a List object. This List provides convenient access to the individual elements, making it easier to work with the data.

Note that the resulting List is initially just a wrapper around an array. If you need a true ArrayList with full modification capabilities, you can use the following code:

List<String> items = new ArrayList<>(Arrays.asList(str.split("\s*,\s*")));

Converting comma-separated strings to Lists in Java is a simple and efficient operation. By leveraging the built-in split() method, developers can save time and effort while ensuring accuracy in data manipulation.

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