Finds which sub-interval contains a given value. Hardcoded X flexible solution

Range.java

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

class HardcodedRangeTest {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        
        Scanner scanner = new Scanner(System.in);
        int val = scanner.nextInt();
        
        if(val >= 0 && val <= 2){
            System.out.println("Inside first interval.");
        }else if(val >= 3 && val <= 5){
            System.out.println("Inside second interval.");
        }else if(val >= 6 && val <= 8){
            System.out.println("Inside third interval.");
        }else{
            throw new RuntimeException("Invalid value");
        }
        
    }
    
}

class Range {
    private int lower;
    private int upper;

    public Range(int lower, int upper) {
        this.lower = lower;
        this.upper = upper;
    }
    
    public boolean inside( int val ){
        return val >= lower && val <= upper;
    }
    
    public static void main(String[] args) {
        Range r = new Range(0, 3);
        
        System.out.println(r.inside(1));
        System.out.println(r.inside(5));
    }

    @Override
    public String toString() {
        return "[ " + lower + ", " + upper + " ]";
    }       
}

interface Command {
    public void execute();
}

class FlexibleTestRange {
    public static void main(String[] args) {
        List<Range> ranges = new ArrayList<>();
        List<Command> commands = new ArrayList<>();
        
        populateRanges(ranges, 0, 8, 3);
        
        System.out.println(ranges);
        
        commands.add(c1);
        commands.add(c2);
        commands.add(c3);
        
        Scanner scanner = new Scanner(System.in);
        int val = scanner.nextInt();
        
        test(val, ranges, commands);
    }
    
    static Command c1 = new Command() {
        @Override
        public void execute() {
            System.out.println("Inside first interval.");
        }
    };
    
    static Command c2 = new Command() {
        @Override
        public void execute() {
            System.out.println("Inside second interval.");
        }
    };
    
    static Command c3 = new Command() {
        @Override
        public void execute() {
            System.out.println("Inside third interval.");
        }
    };

    private static void test(int val, List<Range> ranges, List<Command> commands) {
        
        
        for(int i = 0; i < ranges.size(); i++){
            if(ranges.get(i).inside(val)){
                commands.get(i).execute();
                return;
            }
        }
        
        throw new RuntimeException("Invalid value");
        
    }

    private static void populateRanges(List<Range> ranges, int lower, int upper, int n) {
        int intervalSize = (upper - lower) / n;
        
        int l = lower;
        
        for(int i = 0; i < n; i++){
            
            int u = l + intervalSize <= upper ? l + intervalSize : upper;
            
            ranges.add(new Range( l, u ));
            l += intervalSize + 1;
        }
                
    }
}