/var/tmp $ javac UnnecessaryParenthesesExample.java

/var/tmp $ cat config.xml
<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
        "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
  <module name="TreeWalker">
    <module name="UnnecessaryParentheses"/>
  </module>
</module>

/var/tmp $ cat UnnecessaryParenthesesExample.java
public class UnnecessaryParenthesesExample {

    public static boolean foo(int x, int y) {
        return (x == 0 && y > 0) || (x > 0 && y == 0);
    }

    public static void main(String... args) {
        System.out.printf("x = 0, y = 0: %b%n", foo(0, 0));
        System.out.printf("x = 0, y = 1: %b%n", foo(0, 1));
        System.out.printf("x = 1, y = 0: %b%n", foo(1, 0));
        System.out.printf("x = 1, y = 1: %b%n", foo(1, 1));
    }
}

/var/tmp $ RUN_LOCALE="-Duser.language=en -Duser.country=US"
/var/tmp $ java $RUN_LOCALE -jar checkstyle-9.1-all.jar -c config.xml UnnecessaryParenthesesExample.java
Starting audit...
[ERROR] I:\_tmp\_checkstyle\UnnecessaryParenthesesExample.java:4:16: Unnecessary parentheses around expression. [UnnecessaryParentheses]
[ERROR] I:\_tmp\_checkstyle\UnnecessaryParenthesesExample.java:4:37: Unnecessary parentheses around expression. [UnnecessaryParentheses]
Audit done.
Checkstyle ends with 2 errors.