[問題] 我的程式哪裡有問題?

[LawLombie (盧芹達)]

import java.util.*;

public class TrapArea {
        public static void main(String[] argv) {
                Scanner scan = new Scanner(System.in);
                boolean Again = true;
                char YN;
                double Upper, Lower, Height, Area;
                System.out.println("Calculate a trapezoid\'s area");
                while (Again == true){
                        Upper = Lower = Height = Area = 0;
                        System.out.print("Input the trapezoid\'s upper base(cm):");
                        Upper = scan.nextDouble(); //The upper base of the trapezoid

                        System.out.print("\r\nInput the trapezoid\'s lower base(cm):");
                        Lower = scan.nextDouble(); //The lower base of the trapezoid

                        System.out.print("\r\nInput the trapezoid\'s height(cm):");
                        Height = scan.nextDouble();  //The height of the trapezoid

                        Area = (Upper + Lower) /2 *Height; //The area of the trapezoid
                        System.out.println("\r\nThe area of the trapezoid is" + Area + "cm2");
                        System.out.print("Do you want to calculate another trapezoid\'s area?
Input Y or N.");
                        YN = scan.nextChar();
                        if (YN == 'N'){
                                Again = false;
                        }
                }
        }
}

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如上

我在編譯它時，會跳出

https://imgur.com/NdRqQZG

請問要如何修改呢???


(第一次發文)

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→ LawLombie: 很抱歉，我可能需要明天才能觀看你們的回覆。
→ LawLombie: 因為我明天才能再用電腦。
→ LawLombie: 還有，System.out.print裡都是英文，是因為我每次用中
→ LawLombie: 文時都會有錯誤。
→ LawLombie: 我就靠你們囉。   QQ
→ LawLombie: 請回應喔!
→ LawLombie: 拜託回答我!
→ LnZhen: Google搜nextchar java就有了
→ fayhong: Scanner應該沒有 nextChar，用 nextLine
→ LawLombie: 謝謝 LnZhen  問題解決了
→ hpbl: Again == true 太冗