Java Coding Problems

147. Writing formatted output directly to a file

Let's suppose that we have 10 numbers (integers and doubles) and we want them to be nicely formatted (have an indentation, alignment, and a number of decimals that sustain readability and usefulness) in a file.

In our first attempt, we wrote them to the file like so (no formatting was applied):

Path path = Paths.get("noformatter.txt");try (BufferedWriter bw = Files.newBufferedWriter(path,    StandardCharsets.UTF_8, StandardOpenOption.CREATE,      StandardOpenOption.WRITE)) {  for (int i = 0; i < 10; i++) {    bw.write("| " + intValues[i] + " | " + doubleValues[i] + " | ");    bw.newLine();  }}

The output of the preceding code is similar to what's shown on the left-hand side of the following diagram:

However, ...