单词首字母更改为大写了吖

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String s = reader.readLine(); String[] stringArray = s.split(" "); String newString = ""; for(String string:stringArray) { try { char c = string.charAt(0); if (Character.isLowerCase(c)) { char capital = Character.toUpperCase(c); string = string.replaceFirst(string.charAt(0) + "", capital + ""); } newString += string + " "; } catch (Exception e) { } } //在此编写你的代码 System.out.println(newString);

这是我的解决方案

package zh.codegym.task.task08.task0823;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

/*
走向全国
*/

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String s = reader.readLine();

        //在此编写你的代码 a65+32=97A  sam i sam
        char[] chars = s.toCharArray();
        int index = chars[0];
        if (index > 96 && index < 122) {
            chars[0] = (char) (index - 32);
        }
        for (int i = 0; i < chars.length; i++) {
            if (chars[i] == ' ') {
                if (chars[i+1] > 96 && chars[i+1] < 122) {
                    chars[i+1] = (char) (chars[i+1] - 32);
                }
            }
        }
        System.out.println(chars);
    }
}

不用了 我给解决了 还要判断 当前字母s 是不是 ‘a’<s<‘z’ 否则不变 package zh.codegym.task.task08.task0823; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /* 走向全国 */ public class Solution { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); //String不可变 StringBuffer可变 String s = reader.readLine(); StringBuffer stringBuffer = new StringBuffer(s); for (int i = s.length()-1; i >0 ; i--) { if(s.charAt(i-1)==' '&&s.charAt(i)!=' '){ char c = s.charAt(i); if('a'<=s.charAt(i)&&'z'>=s.charAt(i)){ char b = (char) (c-32); stringBuffer.setCharAt(i,b); } } } if(s.length()!=0&&s.charAt(0)!=' '&&'a'<=s.charAt(0)&&'z'>=s.charAt(0)){ char c =(char)s.charAt(0); c-=32; stringBuffer.setCharAt(0,c); } s = stringBuffer.toString(); System.out.println(s); //在此编写你的代码 } }