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)
本文介绍了获取字符的扫描仪方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

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 StringnextInt() 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"

这篇关于获取字符的扫描仪方法的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

本站部分内容来源互联网,如果有图片或者内容侵犯了您的权益,请联系我们,我们会在确认后第一时间进行删除!

相关文档推荐

quot;Char cannot be dereferencedquot; error(“Char 不能被取消引用错误)
Java Switch Statement - Is quot;orquot;/quot;andquot; possible?(Java Switch 语句 - 是“或/“和可能的?)
Java Replace Character At Specific Position Of String?(Java替换字符串特定位置的字符?)
What is the type of a ternary expression with int and char operands?(具有 int 和 char 操作数的三元表达式的类型是什么?)
Read a text file and store every single character occurrence(读取文本文件并存储出现的每个字符)
Why do I need to explicitly cast char primitives on byte and short?(为什么我需要在 byte 和 short 上显式转换 char 原语?)