เรียงตามสระ.txt

package javaapplication7;


import java.io.*;
import java.util.*;
public class JavaApplication7 {

   
    public static void main(String[] args) {
       
        String str; Scanner sc = new Scanner(System.in); System.out.println("input String :"); str = sc.nextLine();System.out.println(str);
        char[] 
                ch = str.toCharArray();
   
        Stack st1 = new Stack();  Stack st2 = new Stack(); Stack st3 = new Stack();

        for (int i = 0; i < ch.length; i++) {
     if (ch[i] == 'a' || ch[i] == 'e' || ch[i] == 'i' || ch[i] == 'o' || ch[i] == 'u') {
         st3.push(ch[i]);
System.out.println("push สระ");}
     
     else if (ch[i] == 'A' || ch[i] == 'E' || ch[i] == 'I' || ch[i] == 'O' || ch[i] == 'U') { 
         st3.push(ch[i]);} 
     
     else if (65 <= (int) ch[i] && (int) ch[i] <= 90) {
         st1.push(ch[i]);
System.out.println("push big");
      } 
     else if (97 <= (int) ch[i] && (int) ch[i] <= 122) {
        st2.push(ch[i]);
  System.out.println("push small");
      }

 } while (!st1.empty()) { System.out.println("pop stack1 :" + st1.pop());}
 while (!st2.empty()) { System.out.println("pop stack2 :" + st2.pop()); }
 while (!st3.empty()) { System.out.println("pop stack3 :" + st3.pop());
    }
  }
}