java - 如何制作字符数组扫描仪？

Question

比如如何让用户可以输入 char 数组的值？

这是我尝试实现的尝试，但出现语法错误:

    char [] bacteriaStrand = new char[9];
    String bacteria = bac.next();
    bacteriaStrand = bacteria;

这是迄今为止我的全部代码:

import java.util.Scanner;
public class SodiknBrukDNAAnalysispt3v1
{
    public static void main(String[] args)
    {
        Scanner bac = new Scanner(System.in);
        char [] treatmentStrand = {'T','C','G','A','G','A','G','T','A','T','C','C','C','A','G'};
        char [] bacteriaStrand = new char[9];
        char [] splicedStrand = new char[treatmentStrand.length + bacteriaStrand.length];
        System.out.println("NIH Treatment Splicer v. 1");
        System.out.println(" ");
        System.out.print("Treatment Strand: ");
        for (int t = 0; t < treatmentStrand.length; t++)
        {
            System.out.print(treatmentStrand[t]);
        }
        System.out.println(" ");
        System.out.print("Bacterium Strand: ");
        String bacteria = bac.next();
        bacteriaStrand = bacteria;
        for (int b = 0; b < bacteriaStrand.length; b++)
        {
            System.out.print(bacteriaStrand[b]);
            if (bacteriaStrand[b] != 'A' || bacteriaStrand[b] !='C' || bacteriaStrand[b] !='T' || bacteriaStrand[b] !='G')
            {
                System.out.println("Error! You can only input capital A, C, T, and G.");
            }
        }
    }
}

Answer 1

如果您想要一个 char[](基元)，您可以使用返回 char[] 的方法。

源代码:

public static char[] toCharArray(String input){
        StringTokenizer stringTokenizer = new StringTokenizer(input, " ");
        char[] chars = new char[stringTokenizer.countTokens()];

        for (int i = 0; i < chars.length; i++)
            chars[i] = stringTokenizer.nextToken().charAt(0);

        return chars;
    }

实现:

char[] bacteriaStrand = toCharArray(bacteria);

- 或 -

如果您的字符串未分隔:

*已编辑*

That second example can be easily implemented by just calling String#toCharArray(), which returns a copy of the characters in the string. – Obicere

String string = "STRING";
char[] chars = string.toCharArray();

谢谢