java代码双重打印一行

Question

    char grade;
    for(int x=1; x<6; x++){
        System.out.print("Please enter your course grade here: ");
        grade = (char) System.in.read();
    }
    System.out.println("Thank you! Keep up the good work!");
}

这是我的代码，似乎是对的，但这是输出

Please enter your course grade here: A
Please enter your course grade here: Please enter your course grade here: A
Please enter your course grade here: Please enter your course grade here: A
Thank you! Keep up the good work!

顺便说一下，我输入了A。 你们有谁知道为什么会这样吗

Answer 1

你可以试试这个：

char grade;
for(int x=1; x<6; x++){
    System.out.print("Please enter your course grade here: ");
    grade = (char) System.in.read();
    while (grade == '\n')
        grade = (char) System.in.read();
}
System.out.println("Thank you! Keep up the good work!");
}

但它还没有经过测试。理论上，它应该忽略任何新词