BlueJ錯誤：不兼容的類型：java.lang.String無法轉換為java.lang.String []

Question

嗨，專家我是Java編程的新手，我決定學習它。 我正在使用Oracle頁面上的Java學習教程來學習編碼。

請幫助我了解如何更正我的代碼以及哪里出了問題

謝謝這是我的代碼：

public class Demo
{
    public static void main(String[] args) {

        String[][][] year11 ={
             {"Mr. ", "Miss. "}, *// this is where i had the error: incompatible  types: java.lang.String cannot be converted to java.lang.String[]*
             {"James", "Jude", "Samuel",
             "Sara", "Danielle", "Serah",
             "David", "Natalie", "Aubrey"},
             {"Year11_A", "Year10_A", "Year11_B", "Year10_A", "Year10_B"} 
            };
        char[] aGrade = {'A', 'B', 'C', 'D', 'U'};

        int[] numGrade = {100, 97, 87, 92, 67, 71, 56, 66, 87}; 

        System.out.println("Name:" + year11[0][0] + "Result: " + numGrade[4] +
                           "Grade: " + aGrade[3]);
        System.out.println("Name:" + year11[0][1] + "Result: " + numGrade[3] +
                           "Grade: " + aGrade[0]);
        System.out.println("Name:" + year11[0][2] + "Result: " + numGrade[2] +
                           "Grade: " + aGrade[1]);
        System.out.println("Name:" + year11[1][3] + "Result: " + numGrade[8] +
                           "Grade: " + aGrade[1]);
        System.out.println("Name:" + year11[1][4] + "Result: " + numGrade[5] +
                           "Grade: " + aGrade[2]);
        System.out.println("Name:" + year11[1][5] + "Result: " + numGrade[2] +
                           "Grade: " + aGrade[2]);
        System.out.println("Name:" + year11[0][6] + "Result: " + numGrade[1] +
                           "Grade: " + aGrade[1]);
        System.out.println("Name:" + year11[1][7] + "Result: " + numGrade[6] +
                           "Grade: " + aGrade[3]);
        System.out.println("Name:" + year11[1][8] + "Result: " + numGrade[7] +
                           "Grade: " + aGrade[3]);

    }

}

Answer 1

String[][][]是3維數組引用類型，但是您要為其分配2維數組，這會使編譯器感到困惑。 （期望您在另一個數組中有"Mr. " 。）將其更改為String[][] year11 = { 。