Java: Read all lines of a file with Files.readAllLines

NIO Files utilities read and write files in a single call.

Code

Path tmp = Files.createTempFile("demo", ".txt");
Files.writeString(tmp, "one\ntwo\nthree");
List<String> lines = Files.readAllLines(tmp);
System.out.println("lines = " + lines.size());
System.out.println(lines.get(1));
Files.deleteIfExists(tmp);

Output

lines = 3
two

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Published 2026-07-26