如何使用Scanner使Java读取非常大的文件？

Question

我正在使用以下基本功能,我从网上复制读取文本文件

    public void read ()
{
    File file = new File("/Users/MAK/Desktop/data.txt");
    System.out.println("Start");
    try
    {
        //
        // Create a new Scanner object which will read the data from the
        // file passed in. To check if there are more line to read from it
        // we check by calling the scanner.hasNextLine() method. We then
        // read line one by one till all line is read.
        //
        Scanner scanner = new Scanner(file);
        int lineCount = 0;
        if (scanner == null)
        {
            System.out.println("Null File");
        }
        else
        {
            System.out.println(scanner.toString());
        }
        while (scanner.hasNextLine())
        {
            String line = scanner.nextLine();

            System.out.println("Line " + lineCount +" contain : " + line);
            lineCount++;
        }
        System.out.println("End of Try Bluck");
    }
    catch (FileNotFoundException e)
    {
        e.printStackTrace();
        System.out.println("Exception Bluck");
    }
    System.out.println("End");
}
}

它适用于中小型文件(包含10到2万行数据)但是它无法使用包含50万行的文件.我没有收到错误(至少没有看到任何人).那么发生了什么？我该怎么做才能准备好这么大的文件？

注意:我已经在运行Windows Server 2008且4 GB内存的测试计算机上增加了2 GB的堆.但这没有多大帮助!

请有人能告诉我这里应该做些什么吗？

---

更新01

以下是输出

开始

java.util.Scanner [delimiters =\p {javaWhitespace} +] [position = 0] [match valid = false] [need input = false] [source closed = false] [skipped = false] [group separator = \,] [decimal separator =.] [positive prefix =] [negative prefix =\Q-\E] [positive suffix =] [negative suffix =] [NaN string = \Q\E] [infinity string = \Q∞\ E ]

尝试Bluck结束

结束

Answer 1

最好使用FileReader获取BufferedReader