Question

我在给定代码下运行时遇到arrayoutofbond错误，
有时候它按预期运行，有时会出错。任何人都可以在我错的地方帮助我。

   import java.io.BufferedReader;
   import java.io.BufferedWriter;
   import java.io.File;
   import java.io.FileInputStream;
   import java.io.FileNotFoundException;
   import java.io.FileWriter;
   import java.io.IOException;
   import java.io.InputStreamReader;
   import java.text.SimpleDateFormat;
   import java.util.ArrayList;
   import java.util.Date;

   public class getFileContent{

    public void listFiles() throws IOException, InterruptedException{

        File directory = new File("C:\\ScriptLogFile\\"); 
        File[] myarray;  
        myarray=directory.listFiles();
        int i=0;
        ArrayList<String> arrayList = new ArrayList<String>();
        SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyy_hhmmss");   
        Date curDate = new Date();   
        String strDate = sdf.format(curDate);   
        String fileName = strDate;
        File file = new File("C:\\ExcelReport_"+fileName+".csv");
        FileWriter fileWritter = new FileWriter(file, true);
        BufferedWriter bwr = new BufferedWriter(fileWritter);
        String filename = null; 
        try {
            for (int j = 0; j < myarray.length; j++)
            {
                File path=myarray[j];
                FileInputStream  fis = new FileInputStream (path);
                BufferedReader br = new BufferedReader(new InputStreamReader(fis));
                if(path.isFile()){
                    if(path.getName().endsWith(".csv")){
                        filename = path.getName();
                        String line;
                        bwr.write(filename+",");
                        while ((line = br.readLine()) != null) {
                            if(line.contains("-")){
                                String[] part = line.split("-");
                                arrayList.add(part[1]);
                                bwr.write(arrayList.get(i)+",");
                                i++;
                            }
                            else{

                            }
                        }
                        bwr.write("\r\n");
                    }
                }

            }
        }catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        bwr.close();
    }

    public static void main(String[] args) throws IOException, InterruptedException {
        getFileContent gfc = new getFileContent();
        gfc.listFiles();
    }
   }

Answer 1

我们需要一个堆栈跟踪来查看引发异常的位置。但是，您似乎在假设part[]的长度。记住数组是0索引的，第一个条目是索引0，即part[0]。即便如此，通常根本不需要很多条目："xyz".split("-")是长度为1的数组，其唯一元素"xyz"位于索引0处。

运行java代码时出现arrayoutofbond错误

1 个答案: