java - 有关 Java 数组的帮助 : Saving to output file

Question

public char[] calculateGrade(int [] scores, char [] grades){
    for (int r = 0; r < scores.length; r++){
        //System.out.println(scores[r] + " ");
        if (scores[r] > 90)
            grades[r] = 'A';
        else if (scores[r] > 80)
            grades[r] = 'B';
        else if (scores[r] > 70)
            grades[r] = 'C';
        else if (scores[r] > 60)
            grades[r] = 'D';
        else
            grades[r] = 'F';
    for (int i = 0; i < grades.length; i++)
        System.out.println(grades[i]);

    }
    return grades;

}

上面是我的整个程序的一小部分，它从文件中获取分数并将其转换为字母等级。我需要将这些字母成绩放入该文件中。字母等级需要与分数相对应。一次一行有 26 个不同的乐谱。我会把整个代码放在这里，但它真的很长。请大家帮忙!

Answer 1

我建议让每种方法只做一件事并做好它。不要计算成绩并将其打印出来。

public void printGrades(PrintStream ps, char [] grades) {
    for (char grade : grades) {
       ps.println(grade);
    }
}

public char[] calculateGrade(int [] scores){

    char [] grades = new char[scores.length];

    for (int r = 0; r < scores.length; r++){
        if (scores[r] > 90)
            grades[r] = 'A';
        else if (scores[r] > 80)
            grades[r] = 'B';
        else if (scores[r] > 70)
            grades[r] = 'C';
        else if (scores[r] > 60)
            grades[r] = 'D';
        else
            grades[r] = 'F';
    }
    return grades;

}