如何擦除文本文件上的数据

Question

我有这样的代码:

public void makeFile(String sFileName, int gene_ration)
    {
        try
        {
            //deleteFile("genetic_algorithm.txt"); 
            if (!myfile.exists()) {
                myfile.mkdirs();
            }
            File gpxfile = new File(myfile, sFileName);
            FileWriter writer = new FileWriter(gpxfile, true);
            writer.append("Generation " + gene_ration + "rn");
            for(chromosomesNumber = 0; chromosomesNumber < indexOfChromosomes ; chromosomesNumber++)
            {   writer.append(chromosomesNumber + ". " );
                writer.append(population[chromosomesNumber] + " ");
                writer.append("Nilai fitness : " + population[chromosomesNumber].fitness + "rn");
            }
            writer.append("rn");
            writer.flush();
            writer.close();
        }
        catch(IOException e)
        {
             e.printStackTrace();
             String importError = e.getMessage();
        }
    }

我想擦除数据上的textfile每次我编译它和之前添加数据到textfile。我该怎么做呢?任何想法?

Answer 1

有一个File.delete()方法

http://docs.oracle.com/javase/1.4.2/docs/api/java/io/File.html delete ()