获取字符的扫描仪方法

Scanner method to get a char(获取字符的扫描仪方法)

问题描述

什么是Scanner 方法来获取Java 中键盘返回的char.

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

比如 nextLine() 代表 String，nextInt() 代表 int 等等

like nextLine() for String, nextInt() for int, etc.

推荐答案

要从 Scanner 获取 char，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"

如果您需要来自 Scanner 的一堆 char，那么(可能暂时)将分隔符更改为空字符串可能会更方便.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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