linux系统如何替换文档中的关键字数值为原来的几倍

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class ReplaceKeywords {
    public static void main(String[] args) {
        replaceKeywords("input.txt", "output.txt");
    }

    public static void replaceKeywords(String inputFile, String outputFile) {
        try (BufferedReader br = new BufferedReader(new FileReader(inputFile));
             BufferedWriter bw = new BufferedWriter(new FileWriter(outputFile))) {
            String line;
            while ((line = br.readLine()) != null) {
                String replacedLine = replaceKeywordValue(line, "HIGH", 0.8);
                bw.write(replacedLine);
                bw.newLine();
            }
        } catch (IOException e) {
            System.err.println("Exception occurred: " + e.getMessage());
        }
    }

    public static String replaceKeywordValue(String line, String keyword, double multiplier) {
        String[] parts = line.split("=");
        if (parts.length != 2) {
            return line;
        }
        String before = parts[0].trim();
        String after = parts[1].trim();

        if (before.endsWith(keyword)) {
            try {
                double value = Double.parseDouble(after);
                double newValue = value * multiplier;
                return before + " = " + String.valueOf(newValue) + " " + after.substring(after.indexOf(' '));
            } catch (NumberFormatException e) {
                // Handle the case where the value after the keyword is not a number
            }
        }

        return line;
    }
}