The Files.exists method has noticeably poor performance in JDK 8, and can slow an application significantly when used to check files
that don’t actually exist.
The same goes for Files.notExists, Files.isDirectory and Files.isRegularFile from java.nio.file
package.
Note that this rule is automatically disabled when the project’s sonar.java.source is not 8.
Noncompliant code example
Path myPath;
if(java.nio.file.Files.exists(myPath)) { // Noncompliant
// do something
}
Compliant solution
Path myPath;
if(myPath.toFile().exists())) {
// do something
}
