java如何完成我的文件处理程序？

Question

嗨，我对java非常陌生，我不知道如何完成我的代码。我正试着写一个程序来读取。txt文件，并修复文本中的任何间距问题。我写了一个代码，在每个单词之间放置一个空格，但我不知道如何让它在a.，！，之后放置两个空格！，还是

以下是我到目前为止的情况：

import java.io.*;
import java.util.*;

public class Word_Processor
{
    public static void main(String[] args)
    throws FileNotFoundException
    {
        Scanner input = new Scanner(new File("Programming3_text.txt"));
        PrintStream output =
            new PrintStream(new File("Programming3_text_fixed.txt"));
        while (input.hasNextLine())
        {
            String text = input.nextLine();
            echoFixed(text, output);
            echoFixed(text, System.out);
        }
    }
    public static void echoFixed(String text, PrintStream output)
    {
        Scanner data = new Scanner(text);
        if (data.hasNext())
        {
            output.print(data.next());
            while (data.hasNext())
            {
                output.print(" " + data.next());
            }
        }
        output.println();
    }
}

我尝试添加IF语句，但那不起作用。正如我所说的，我是Java和编程的新手，因此在此问题上的任何帮助都将不胜感激

Answer 1

最好使用StringTokenizer

import java.io.*;
import java.util.*;

public class Word_Processor {

    public static void main(String[] args)
            throws FileNotFoundException {
        Scanner input = new Scanner(new File("Programming3_text.txt"));
        PrintStream output
                = new PrintStream(new File("Programming3_text_fixed.txt"));
        while (input.hasNextLine()) {
            String text = input.nextLine();
            echoFixed(text, output);
            echoFixed(text, System.out);
        }
    }

    public static void echoFixed(String text, PrintStream output) {
        Scanner data = new Scanner(text);
        StringTokenizer tokenizer = new StringTokenizer(text, " .,!?");//put the replaceable characters here DON'T FORGET ' '(space) THERE IS ONE JUST AT THE START OF " .,!?" BEFORE '.'
        String outputLine="";
        while (tokenizer.hasMoreTokens()) {
            outputLine = outputLine + tokenizer.nextToken() + " ";
        }
        output.println(outputLine.trim());
        /* Previous Code
         if (data.hasNext()) {
         output.print(data.next());
         while (data.hasNext()) {
         output.print(" " + data.next());
         }
         }
         output.println();*/
    }
}

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