Menu w/ array odd,even,divisible by 3 and vowel loop counter

package javaapplication328;
import java.util.*;
/**
 *
 * @author Medina
 */
public class JavaApplication328 {
//
    //
    public static void main(String[] args) {
        Scanner scan=new Scanner (System.in);
        //counter variables and values here
        int ctr = 0;
        int i;
        System.out.println("Menu \n[1] count and display odd\n[2] count and display even\n[3] divisible by 3\n[4] vowels");
        System.out.print("Choose a number: ");
        int menu = scan.nextInt();
        System.out.println("-00000000000000000000000000000000000000000000000000-");
        System.out.println(" ");
        if (menu==1){
        //cout display odd
           System.out.println("Display odd array");
           int[]arr=new int[5];
           for(i=0;i<5;i++)
           {System.out.println("Input arr["+i+"]: ");
           arr[i]=scan.nextInt();}
           System.out.println(" ");
           for (i=0;i<5;i++){
           if (arr[i]%2!=0){System.out.print("arr["+i+"]: ");
           System.out.println(arr[i]);}
           }
        }

        else if (menu==2){
        //cout display even
           System.out.println("Display even array");
           int[]arr=new int[5];
           for(i=0;i<5;i++)
           {System.out.println("Input arr["+i+"]: ");
           arr[i]=scan.nextInt();}
           System.out.println(" ");
           for (i=0;i<5;i++){
           if (arr[i]%2==0){System.out.print("arr["+i+"]: ");
           System.out.println(arr[i]);}
           }
        }

        else if (menu==3){
        //cout divisible by 3
           System.out.println("Display divisible by 3 array");
           int[]arr=new int[5];
           for(i=0;i<5;i++)
           {System.out.println("Input arr["+i+"]: ");
           arr[i]=scan.nextInt();}
           System.out.println(" ");
           for (i=0;i<5;i++){
           if (arr[i]%3==0){System.out.print("arr["+i+"]: ");
           System.out.println(arr[i]);}
           }
        }

        else if (menu==4){
        //cout vowels
        System.out.print("Input character string: ");
        String str = scan.next();
        str=str.toLowerCase();
        char c = ' ';
        int vowel = 0;
        for(i=0;i<str.length();i++)
        {c=str.charAt(i);
        if (c=='a'||c=='e'||c=='i'||c=='o'||c=='u')
         {vowel++;}
        }
        System.out.print("There are: "+vowel+" vowel/s");
        }

        else{
         System.out.println("Please choose a number");
        }

    }

}