备用 br.read() 被跳过。如何使它们对编译器可见？

Question

    System.out.println("Q1.HOW DO YOU RECHARGE?");
    System.out.println("A. SPENDING TIME ALONE");
    System.out.println("B. PUBLIC DISCUSSIONS OR PARTIES");
    System.out.println("C. BOTH OF THEM ARE FINE IF I'M IN THE MOOD");
    char choice1 = (char)br.read();//this line gets executed perfectly fine
    if(choice1 == 'A')
    ct+=20;
    else if(choice1 == 'B')
    ct+=10;
    else
    ct+=30;
    System.out.println("Q2.ARE YOU OPEN TO NEW PEOPLE?");
    System.out.println("A. YES OF COURSE");
    System.out.println("B. I DON'T WANT TO TALK TO NEW PEOPLE");
    System.out.println("C. I CAN'T OPEN UP TO NEW PEOPLE UNTIL THEY ARE CLOSE ENOUGH");
    char choice2 = (char)br.read();//this one doesn't
    if(choice2 == 'A')
    ct+=10;
    else if(choice2 == 'B')
    ct+=20;
    else
    ct+=30;
    System.out.println("Q3.WOULD YOU GO FIRST OR LAST FOR A PRESENTATION?");
    System.out.println("A. I GUESS I WOULD GO FIRST ONLY IF I'M VERY CONFIDENT");
    System.out.println("B. OF COURSE FIRST!");
    System.out.println("C. NO. SO THAT I CAN LEARN FROM OTHER'S MISTAKES");
    char choice3 = (char)br.read();//this does
    if(choice3 == 'A')
    ct+=30;
    else if(choice3 == 'B')
    ct+=10;
    else
    ct+=20;

等等，直到最后所有偶数位置的阅读都被忽略，尽管打印了相应的问题。尝试过各种古怪的事情，现在我失去了希望，请帮助！

Answer 1

正如@Jim Garrison 所说，这是因为忘记了用户输入的 newline (enter) 个字符。

解决替换

(char)br.read();

有

(char)br.readLine().charAt(0);

charAt(index)函数在Javareturns相关String.Here0 th位置的索引位置出现的字符，即第一个字符。这将工作。

所以修改为：-

char choice1 = (char)br.readLine().charAt(0); // Line 5
char choice2 = (char)br.readLine().charAt(0); // Line 16
char choice3 = (char)br.readLine().charAt(0); // Line 27

备用 br.read() 被跳过。如何使它们对编译器可见？

Alternate br.read()'s are getting skipped. How to make them visible to the compiler?

java

input

line

bufferedreader