Sophomore Java Homework-P5.15

/**
 * Name: Method practice - String reverse (array)
 * @author LinChuWen
 * Date: 2014.10.22
 *
 * NCHU EE,course number:2335
 * course name: Object Oriented Language
 * Textbook: Big Java:Late Objects-Cay S. Horstmann
 * Problem: P5.15
 * Description: Input a string, reverse it, print out the result.
 */
import java.util.*;
public class HW4_P5_15 {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("Please input a string: ");

        while(input.hasNext()){
            String str_input = input.nextLine();
            System.out.printf("reverse result: %s\n\n", reverse(str_input));
            System.out.print("Please input a string: ");
        } //while end

        input.close();
    } //main end

    public static String reverse( String str ){
        int cnt_up=0;
        int length = str.length();
        char[] charArray = new char[length];

        for(int cnt_down=length-1 ; cnt_down>=0 ; cnt_down--){
            charArray[cnt_up] = str.charAt(cnt_down);
            cnt_up++;
        } //for end

        String str_reverse = new String(charArray);
        return str_reverse;
    } //reverse() end

} //class end