How to Read Space-Separated Values from a Text File into an ArrayList in Java?

Reading Space-Separated Values from a Text File into an ArrayList

Reading space-separated values from a text file and storing them in an array list involves several steps in Java.

Firstly, use Files#readAllLines() to retrieve all lines in the text file and store them in a List<String>:

List<String> lines = Files.readAllLines(Paths.get("/path/to/file.txt"));

Next, split each line into individual values using String#split() with the whitespace character as the delimiter:

for (String line : lines) {
    String[] parts = line.split("\s+");
}

To convert these string values to integers, use Integer#valueOf():

List<Integer> numbers = new ArrayList<>();
for (String part : parts) {
    numbers.add(Integer.valueOf(part));
}

Once all values are converted to integers and added to the array list, you can access and use them as desired. This approach ensures accurate and efficient reading of space-separated values from a text file into an array list.

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