施詠翔Java套件Scanner,方法length(),charAt()

Java程式碼

import java.util.Scanner; /*開啟套件package util=utility用途,Scanner掃描器*/
/*劉任昌utility industry=公用事業產業,電力,自來水,效用=utility */

class MyClass {
  public static void main(String[] args) {
    String a, b="";
    Scanner myObj = new Scanner(System.in); //輸入到掃描Scanner物件
    System.out.print("輸入: ");
    a = myObj.nextLine();                      /*輸入文字nextLine到變數a */
    System.out.println("長度: " + a.length());
    for (int i = 0; i < a.length(); i++)      /*迴圈 */
        b = a.charAt(i) + b;
      System.out.println("輸出: "+ b);
    }
}

Visual Studio Code程式開發環境