Question

我希望输入是一个单词中的任意数量的字母，这样我就可以将它们混为一谈，如下所示。我不知道我怎么能有任何数量的信件，他们都可以改为.uppercase和.lowercase请帮忙。我刚刚在一个月前启动了java，我不理解for和while函数。请帮我。不使用7个字母时的输出是线程＆＃34; main＆＃34;中的例外情况java.lang.StringIndexOutOfBoundsException：字符串索引超出范围：4 在java.lang.String.charAt（未知来源）在TempCheck.main（TempCheck.java:16）当输入为＆＃34;四＆＃34;

import java.util.*;
public class ShoutAndWhisper {

    public static void main(String[] args) {
        Scanner kb= new Scanner(System.in);

        System.out.println("Now, give me a seven letter word: ");
        String word2 = kb.nextLine();
        word2 =word2.toUpperCase();
        System.out.println("I shout "+word2.toUpperCase()+ " when I’m excited, but I whisper "+ word2.toLowerCase() + " when I can't disturb the neighbours!");

        char e1 = word2.charAt(0);
        char e2 = word2.charAt(1);
        char e3 = word2.charAt(2);
        char e4 = word2.charAt(3);
        char e5 = word2.charAt(4);
        char e6 = word2.charAt(5);
        char e7 = word2.charAt(6);

        e1 = Character.toLowerCase(e1); 
        e2 = Character.toUpperCase(e2); 
        e3 = Character.toLowerCase(e3); 
        e4 = Character.toUpperCase(e4); 
        e5 = Character.toLowerCase(e5); 
        e6 = Character.toUpperCase(e6); 
        e7 = Character.toLowerCase(e7); 

        System.out.println("The word jumbled is: ");
        System.out.print(e1);
        System.out.print(e2);
        System.out.print(e3);
        System.out.print(e4);
        System.out.print(e5);
        System.out.print(e6);
        System.out.print(e7);

        kb.close();
    }

}

Answer 1

public static void main(String[] args) {
        Scanner kb= new Scanner(System.in);

        System.out.println("Now, give me a seven letter word: ");
        String word2 = kb.nextLine();
        word2 = word2.toUpperCase();
        System.out.println("I shout "+word2.toUpperCase()+ " when I’m excited, but I whisper "+ word2.toLowerCase() + " when I can't disturb the neighbours!");

        char e1;

        System.out.println("The word jumbled is: ");

        for(int i = 0; i < word2.length(); i++)
        {
            e1 = word2.charAt(i);
            if(i % 2 == 0)
            {
                System.out.print("" + Character.toUpperCase(e1));
            }
            else
            {
                System.out.print("" + Character.toLowerCase(e1));
            }
        }

        kb.close();
    }

这将允许您将任何大小的单词作为输入，然后它将遍历单词并将每个其他字符更改为小写或大写。％2是模块化分区，因此它将返回余数。如果数字是偶数，则如果它是奇数则为0，那么它将不为0.

如何输入字母并将其更改为大写和小写？ JAVA

1 个答案: