java - 删除空格和大写首字母

Question

我制作了这个程序，它将翻转如下句子: 用户输入:你好，我饿了。冰箱在哪里。 系统输出:饿了，我是你好。冰箱在哪里。

但是最后一个词和“.”之间有空格。在倒装句中。我怎样才能删除？我怎样才能使第一个单词成为大写单词？

    package etzale;


public class etzale {




    public static void main(String[] args) {


        StringBuilder outputString= new StringBuilder();

        String satz;


        System.out.print("Bitte geben Sie einen String ein: ");
        String text="Hallo mir gehts gut. Wie gehts dir. mir gehts spitze.";

        while(text.indexOf(".")>=0){

            satz=text.substring(0, text.indexOf("."));
            text=text.substring(text.indexOf(".")+1);

            String []s= satz.split(" ");
            for(int i=s.length-1; i>=0; i--){

               outputString.append(s[i]);

               if(s[0]==" ");

               outputString.append(" ");

               }

          outputString.append(".");
          outputString.append(" ");

        }
        System.out.print(outputString);
}
}

如何删除最后一个单词和“.”之间的空格？在每个句子中？

Actual Input: Mit gehts gut. Wie gehts dir. Mir gehts spitze.
Actual Output: gut gehts mir  . dir gehts Wie  . spitze gehts Mir  . 

Answer 1

我已经回答了另一个与您几乎类似的问题:Reverse all words, set "." and do the same for the next sentences ，我的解决方案涵盖了这种情况，也尝试一下:

import java.util.Arrays;
import java.util.Collections;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Main {

    public static void main(String[] args) {
        final String userInput = "Hello i´m hungry. Where is the fridge.";
        final String expectedResult = "Hungry i´m Hello. Fridge the is Where.";
        String[] sentences = userInput.split("\\. ");
        String reversedSentences = Stream.of(sentences)
                .map(sentenceString -> new Sentence(sentenceString))
                .map(Sentence::reverse)
                .map(Sentence::firstLetterToUpperCase)
                .map(Sentence::removeAllDots)
                .map(Sentence::dotInTheEnd)
                .map(Sentence::toString)
                .collect(Collectors.joining(" "));
        System.out.println(reversedSentences.equals(expectedResult)); //returns true
    }


}

final class Sentence {
    private final String sentence;

    Sentence(String sentence) {
        this.sentence = sentence;
    }

    Sentence reverse() {
        String[] words = sentence.split(" ");
        Collections.reverse(Arrays.asList(words));
        return new Sentence(String.join(" ", words));
    }

    Sentence firstLetterToUpperCase() {
        String firstLetter = sentence.substring(0, 1);
        String anotherPart = sentence.substring(1);
        return new Sentence(firstLetter.toUpperCase() + anotherPart);
    }

    Sentence dotInTheEnd() {
        return new Sentence(sentence + ".");
    }

    Sentence removeAllDots() {
        return new Sentence(sentence.replaceAll("\\.", ""));
    }

    public String toString() {
        return sentence;
    }
}