扫描器方法获取一个char [英] Scanner method to get a char

问题描述

Scanner 方法用于获取Java中键盘返回的 char 。

What is the Scanner method to get a char returned by the keyboard in Java.

像 nextLine（） for String ， nextInt（） int 等。

推荐答案

要从扫描仪获取 char ，您可以使用 findInLine 方法。

To get a char from a Scanner, you can use the findInLine method.

    Scanner sc = new Scanner("abc");
    char ch = sc.findInLine(".").charAt(0);
    System.out.println(ch); // prints "a"
    System.out.println(sc.next()); // prints "bc"

如果你需要一堆 char 从 Scanner ，那么将分隔符更改为空字符串可能更方便。这将使 next（）每次返回一个长度为1的字符串。

If you need a bunch of char from a Scanner, then it may be more convenient to (perhaps temporarily) change the delimiter to the empty string. This will make next() returns a length-1 string every time.

    Scanner sc = new Scanner("abc");
    sc.useDelimiter("");
    while (sc.hasNext()) {
        System.out.println(sc.next());
    } // prints "a", "b", "c"

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