相关疑难解决方法(0)

构造函数中缓冲区大小的含义是什么？

BufferedReader(Reader in, int size)

正如我写的程序:

import java.io.*;
class bufferedReaderEx{
    public static void main(String args[]){
        InputStreamReader isr = null;
        BufferedReader br = null;
            try{
                isr = new InputStreamReader(System.in);
//              System.out.println("Write data: ");
//              int i = isr.read();
//              System.out.println("Data read is: " + i);
                //Thus the InputStreamReader is useful for reading the character from the stream
                System.out.println("Enter the data to be read by the bufferedReader: ");
                //here isr is containing the lnefeed already so this is needed to be flushed. …

我正在阅读文本文件中的200万行,如上一个问题中提到的 Java最快的方式来阅读200万行的文本文件

现在我将这些信息存储到HashMap中,我想通过TreeMap对其进行排序,因为我想使用ceilingkey.以下方法是否正确？

private HashMap<Integer, String> hMap = new HashMap();

private TreeMap<Integer, String> tMap = new TreeMap<Integer, String>(hMap);