java - 搜索具有可变列大小的数组 java

Question

我想将 .txt 文件复制到新文件后在屏幕上显示其部分内容。文本文件的内容在结构上并不完全相同。

当我这样做时

if (m[11].equals("Channel") && m[12].equals("ID")){ System.out.println("Wavelenght ID = " + m[9]);

我收到一个错误数组越界。

TESTSTEP: DEBUG * Fpga Config ECFG *: EED 3 : Channel ID

如果找到此行，我希望它显示 Wavelenght ID = 3

String p = path.replace("\\", "\\\\");
    File file = new File(p);
    File[]   files = file.listFiles();
    BufferedReader inputStream = null;
    PrintWriter outputStreamI = null;
    PrintWriter outputStreamO = null;

    try {
        String l,c;
        for (int i=0; i<files.length; i++){

            inputStream = new BufferedReader(new FileReader(files[i].getAbsolutePath()));
            outputStreamI = new PrintWriter(new FileWriter("S:\\WRED_IBP\\" + files[i].getName().replaceFirst("[.][^.]+$", "")+ "Ingress.txt"));
            outputStreamO = new PrintWriter(new FileWriter("S:\\WRED_IBP\\" +files[i].getName().replaceFirst("[.][^.]+$", "")+ "Egress.txt"));  

            while ((l = inputStream.readLine())!= null) {
                String[] m=l.split(" ");
                for(int d=0; d<m.length; d++){ 
                    c=m[d];
                    if (c.equalsIgnoreCase("ied_wred") ){outputStreamI.println(l); if (outputStreamI.checkError()){System.err.println("Error in output stream");}} //|| c.equalsIgnoreCase("WARNING") || c.equals("ERROR")
                    else if (c.equalsIgnoreCase("eed_brc_ibp")){outputStreamO.println(l); if (outputStreamO.checkError()){System.err.println("Error in output stream");}} // || c.equalsIgnoreCase("WARNING") || c.equals("ERROR") 
                }   
            }
        }

    } catch(IOException e){
        System.err.println("Caught IOException: " + e.getMessage());
    }//wait(10);
    finally {
        if (inputStream != null) {
            try{ inputStream.close();} catch (IOException e) {e.printStackTrace();}}
        if (outputStreamI != null) {outputStreamI.close();}
        if (outputStreamO != null) {outputStreamO.close();}

    }

}

Answer 1

您可以使用:

if (m.length > 12 && m[11].equals("Channel") && m[12].equals("ID")){ 
    System.out.println("Wavelenght ID = " + m[9]);
}

所以这里不会发生索引越界。

确保将这些行放在 for 循环之前。