Java-读取文件的问题

Java-读取文件的问题,java,io,Java,Io,我有这个功能: public static int checkRank(String lineToCompare){ int rank = 0; try{ // Open the file that is the first // command line parameter FileInputStream fstream = new FileInputStream("ranks.txt"); // Get th

我有这个功能:

public static int checkRank(String lineToCompare){
    int rank = 0;
    try{
        // Open the file that is the first 
        // command line parameter
        FileInputStream fstream = new FileInputStream("ranks.txt");

        // Get the object of DataInputStream
        DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));

        String strLine;
        //Read File Line By Line
        System.out.println("SPOT 0");
        while ((strLine = br.readLine()) != null)   {
            //Compare the line with the line to compare (string)
            System.out.println("SPOT 1");
            if(strLine.trim().equals(lineToCompare)) {
                //I found it!  Read the next line...
                final String lineAfter = br.readLine();
                rank = Integer.parseInt(lineAfter);  
                System.out.println("SPOT 2");
            }else{
                rank = 0;
                System.out.println("SPOT 3");
            }
        }

        //Close the input stream
        in.close();
    }catch (Exception e){//Catch exception if any
        System.err.println("Error: " + e.getMessage());
    }

    System.out.println("Username: " + lineToCompare + " | Rank: " + rank);
    return rank;
}
我的
ranks.txt
文件如下:

test1
2
test2
1
控制台输出(SPOT仅用于调试):


如您所见,如果它工作正常,它会说test1的秩为2。有人能帮我找出问题吗?

在上一次循环迭代中,您正在用
0
覆盖
rank


使用
Break中断循环当你被击中时。

你应该增加一个休息;在打印“SPOT 2”以结束while循环的行后的语句


如果没有中断,则在读取行“test2”时将秩设置为0,然后在读取行“1”时再次设置秩(while循环一直持续到文件末尾)。

什么是
lineToCompare
?@Jeffrey,lineToCompare=test1(如控制台输出中所示)。尝试添加中断;打印SPOT2后。您在阅读“test2”后将排名设置为0,然后在阅读“1”时再次设置排名。@DannyF247 Aha!代码框有一个滚动条。对不起that@ppalasek谢谢你把它修好了!!如果你想把它作为一个答案,这样我就可以接受它并为你争取代表,我将非常乐意:)
[Commands] SPOT 0
[Commands] SPOT 1
[Commands] SPOT 2
[Commands] SPOT 1
[Commands] SPOT 3
[Commands] SPOT 1
[Commands] SPOT 3
[Commands] Username: test1 | Rank: 0