Ajudando Isa no Javinha

package br.edu.iffarroupilha.al.tiiem.isadoraFerrao;
import java.util.Scanner;
public class Exercices{
    public static void main(String[] args){
        //Exercício 03
        Scanner scanner = new Scanner(System.in);
            int i = scanner.nextInt();
            String s = "";
            switch(i){
                case 1: s = "January";
                case 2: s = "February";
                case 3: s = "March";
                case 4: s = "April";
                case 5: s = "May";
                case 6: s = "June";
                case 7: s = "July";
                case 8: s = "August";
                case 9: s = "September";
                case 10: s = "October";
                case 11: s = "November";
                case 12: s = "December";
            }
            System.out.println(s);
        scanner.close();

        //Exercício 02
        Scanner scanner = new Scanner(System.in);
        float i = scanner.nextFloat();
        if(i < 1377.08){
            System.out.println(i - i * 0.08);
            scanner.close();
            return;
        }
        if(i < 2195.13){
            System.out.println(i - i * 0.09);
            scanner.close();
            return;
        }
        if(i < 4390.25){
            System.out.println(i - i * 0.11);
            scanner.close();
            return;
        }
        scanner.close();
    }
}