在给定范围内在Java中生成随机小写字母

Question

我正在尝试编写一个方法,可以采用起始小写字母和结束小写字母,并生成该范围内的随机字母.接下来,将随机字母分配给由用户确定的大小的数组的元素.到目前为止,只要起始字符为"a",我的代码似乎就可以工作.当起始角色不是'a'时,我无法弄清楚如何使它工作.我写了这个完整的程序来尝试解决我的方法:

import java.util.Random;
import java.util.Scanner;
public class Add
{
    public static void main( String[] args )
    {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter array size: ");
        int arraySize = scan.nextInt();
        char charArray[] = new char[arraySize];

        int fromChar;
        int toChar;
        do
        {
        System.out.print("Enter first character: ");
        String line = scan.next();
        fromChar = line.charAt(0);

        System.out.print("Enter second character: ");
        line = scan.next();
        toChar = line.charAt(0);

        Random generator = new Random();
        for(int i = 0; i < arraySize; i++)
        {
            int randomInt = generator.nextInt(toChar - fromChar + 1) + 97;
            //System.out.print(randomInt + " | "); //used to print unicode values
            charArray[i] = (char)(randomInt);
        }
        System.out.println(charArray);
    }
        while(true);

    } // end of main
}// end of class

任何帮助将不胜感激!

Answer 1

int randomInt = generator.nextInt(toChar - fromChar + 1) + fromChar;