Instructions in README not correct?

[tikoo]

As per the README:

_JDK 8 or later is required to build the code. Make sure that your JAVA_HOME points to proper JDK release and the run the following command:

./gradlew shadowJar_

$ javac -version
javac 1.8.0_121

$ ./gradlew shadowJar

/Users/rtikoo/projects/string-performance/src/main/java/eu/javaspecialists/perf/string/StringIntrinsicsBenchmark.java:177: error: cannot find symbol
return Arrays.mismatch(value, other) == -1;
^
symbol: method mismatch(byte[],byte[])
location: class Arrays
1 error

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':compileJava'.

Compilation failed; see the compiler error output for details.

• Arrays.mismatch() was added in Java 9.