Cannot resolve the symbol 'Arrays'

I was gone through lot of similar issues in StackOverflow and here, even no luck. So, finally came for your help.

I am using

1. Windows 7 32bit OS 
2. java version "1.8.0_221"
3. IntelliJ Idea 11.0.2

I am doing a basic program in java. But I am getting a compilation error as Cannot resolve the symbol 'Arrays'

My code is this:

import java.util.Arrays;
import java.util.Collections;

import java.util.List;

public class EmployeesData {

    public static List<Employee> getEmployees() {
        return Arrays.asList(
                new Employee(201, "Kumar", "MS", 20000),
                new Employee(202, "Kiran", "Wells", 30000),
                new Employee(201, "Kumar", "Wells", 40000), 
                new Employee(203, "Vishal", "MS", 25000),
                new Employee(203, "Srikanth", "MS", 45000),
                new Employee(204, "Vimal", "Wells", 50000));
    }

    public static List<Employee> getEmployees2() {
        String a = null;
        return Collections.singletonList(
                new Employee(201, "Kumar", "MS", 20000),
                new Employee(202, "Kiran", "Wells", 30000),
                new Employee(201, "Kumar", "Wells", 40000),
                new Employee(203, "Vishal", "MS", 25000),
                new Employee(203, "Srikanth", "MS", 45000),
                new Employee(204, "Vimal", "Wells", 50000));
    }
}

I am getting the same error for Collections class also.

I tried in eclipse also, I am facing the same issue in eclipse also. I tried to specify libraries also. even not solved. Might be something I have to do extra in setting(preferences).

I posted first in stackoverflow(https://stackoverflow.com/questions/57769907/intellij-cannot-resolve-the-symbol-arrays) four days back even not yet resolved.

Please help me, please.