'Files.readString()' or 'Files.writeString()' can be used

Reports method calls that read or write a String as bytes using java.nio.file.Files. Such calls can be replaced with a call to a Files.readString() or Files.writeString() method introduced in Java 11.

Example:

  String s = "example";
  Files.write(Paths.get("out.txt"), s.getBytes(StandardCharsets.UTF_8), StandardOpenOption.WRITE);
  s = new String(Files.readAllBytes(Paths.get("in.txt")), StandardCharsets.ISO_8859_1);

After the quick fix is applied:

  String s = "example";
  Files.writeString(Paths.get("out.txt"), s, StandardOpenOption.WRITE);
  s = Files.readString(Paths.get("in.txt"), StandardCharsets.ISO_8859_1);

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

ReadWriteStringCanBeUsed

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

New in 2018.3

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024