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到目前为止，这是我的编码。我正在制作一个程序来帮助为用户随机创建密码。我在制作随机字母时遇到问题。我想到了一种方法，但它给了我一个不兼容的错误，我尝试了：

chars[] letters= "abecdefghijklmnopqrstuvwxyz".toCharArray();

这是我目前的代码。

import java.util.Random;
import java.util.Scanner;

public class Password
{
  public static void main(String [] args)
  {
    char letters;
    Scanner in = new Scanner (System.in);
    System.out.println("Please choose from the following menu options:");
    System.out.println("[1] Lowercase Letters");
    System.out.println("[2] Lowercase & Uppercase Letters");
    System.out.println("[3] Lowercase, Uppercase, and Numbers");
    System.out.println("[4] Lowercase, Uppercase, Numbers and Punctuation");
    System.out.println("[5] Quit");
    System.out.println ("Enter Selection:");
    int selection = in.nextInt();
    System.out.println("Password Length (1-14):");
    int length = in.nextInt();
    if (selection == 1)
      letters = "abcdefghisjklmnopqrstuvwxyz".toCharArray();
    Stringbuilder sb = new StringBuilder();
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1 回答 1

0

toCharArray 返回 char[] 并且 letters 只是 char

于 2013-04-04T16:03:44.867 回答