Question

我有txt文件（

aaayyy,qqqqwwwww
sswwww,qqswddfed
swssaa,deedddddd
dsssss,deeffcccc
sssddd,deessaaaa
ddddss,qqwwedfvv
qwwwsd,qqddfffff
ddffff,wwedddddd
sddsss,qqqdddddd

）我想在其中查找，计算所有以相同字符开头的单词（所有单词以qq = qqqqwwwww,qqswddfed,qqwwedfvv .... .开头），并输出保存在new.txt中，qq = 5。

public static void main(String[] args) throws FileNotFoundException, IOException {
    String searchWord = "aaayyy";
    FileInputStream fis = new FileInputStream(new File("C:/test.txt"));
    byte[] content = new byte[fis.available()];
    fis.read(content);
    fis.close();
    String[] lines = new String(content, "UTF-8").split(",");
    for (String line : lines) {
        String[] words = line.split(",//n");
        int j=1;
        for (String word : words) {
            if (word.equalsIgnoreCase(searchWord)) {
                System.out.println("find word = " +j);

            }

        }
    }
}

这里，只在文档中找到一个单词的代码，我知道这段代码并不好。如果您有完全不同的解决方案，请写信。谢谢你的时间。

Answer 1

我不知道你的searchWord变量是什么，但是如果这是你要搜索所有单词的前缀那么就是这样的。

public static void main(String[] args) throws FileNotFoundException, IOException {
    String searchWord = "aaayyy";
    FileInputStream fis = new FileInputStream(new File("C:/test.txt"));
    byte[] content = new byte[fis.available()];
    fis.read(content);
    fis.close();
    String[] lines = new String(content, "UTF-8").split(",");

    PrintWriter outputWriter = new PrintWriter("new.txt", "UTF-8"); //create writer for your new.txt

    int amountFound = 0; //amount of times the word started with searchWord

    for (String line : lines) {
        String[] words = line.split(",//n");

        for (String word : words) {
            if (word.startsWith(searchWord)) { //check if word starts with searchWord
                amountFound++;
            }

        }
        writer.println(searchWord + "="+amountFound);
        writer.close();
    }
}

如果您想检查所有字词而不仅仅是searchWord，请告诉我，如果我能找到解决方案，我会尝试编辑我的答案。

Answer 2

根据我的理解，你有一个带有逗号分隔的单词和换行符的.txt文件，你想要计算以给定搜索词开头的单词数量，是吗？

这段代码可以解决问题：

public static void main(String[] args) throws FileNotFoundException, IOException {
    String searchWord = "qq";
    FileInputStream fis = new FileInputStream(new File("./words.txt"));
    byte[] content = new byte[fis.available()];
    fis.read(content);
    fis.close();
    String[] lines = new String(content, "UTF-8").split(",");
    ArrayList<String> wordRes = new ArrayList<String>();
    for (String line : lines) {
        String[] words = line.split("\n");
        for (String word : words) {
            if(word.startsWith(searchWord)) {
                wordRes.add(word);
            }
        }
    }
    System.out.println("Total words beginnig with '" + searchWord + "': " + wordRes.size());
}

如果您想查找.txt文件中包含searchWord的所有单词，只需更改此内容：

            if(word.startsWith(searchWord))

到

            if(word.contains(searchWord))

Answer 3

尝试我的解决方案

    Scanner sc = new Scanner(new FileInputStream("1.txt"));
    int n = 0;
    while(sc.findWithinHorizon("\\bqq", 0) != null) {
        n++;
    }
    System.out.println(n);

Answer 4

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;

/**
 *
 * @author Halim
 */
public class CountWords {
 public static void main(String[] args) throws FileNotFoundException, IOException {
    String searchWord = "aa";
    FileInputStream fis = new FileInputStream(new File("./words.txt"));
    byte[] content = new byte[fis.available()];
    fis.read(content);
    fis.close();
    String[] lines = new String(content, "UTF-8").split(",");
    ArrayList<String> wordRes = new ArrayList<String>();
    for (String line : lines) {
        String[] words = line.split("\n");
        for (String word : words) {
            if(word.startsWith(searchWord)) {
                wordRes.add(word);
            }
        }
    }
    System.out.println("Total words beginnig with '" + searchWord + "': " + wordRes.size());
     System.out.println("word are "+wordRes);
}   
}

通过首字母Java查找，计算文档中的单词

4 个答案: