java - Java中简单的逐行读取

Question

我输入了以下格式:

12 : 13 24 1 2
2 : 1 4
9 : 0 1 82
...

我想将每一行作为 StringStream 读取，然后逐段读取每个 StringStream。

For example, line 1 would be stored as a StringStream "12 : 13 24 1 2", and then I could just read it in piece by piece ("12", ":", "13", "24", "1", "2") (something like cin >> stingstream in C++).

在 Java 中执行此操作的最佳方法是什么？

Answer 1

您尝试做的事情称为标记化:)

// pretty standard open file with buffered reader.
File           file               = new File("inputFileName");
FileReader     fileReader         = new FileReader(file);
BufferedReader bufferedFileReader = new BufferedReader(fileReader);

// The string that will hold the content of each line.
String line;

// Read each line and store string content in line.
while((line=bufferedFileReader.readLine())!=null)
{
   // Create a tokenizer to split the string into tokens.
   StringTokenizer tokenizedLine= new StringTokenizer(line);

   // For each token in the current line so something
   while (while (tokenizedLine.hasMoreTokens()) 
   {
         System.out.println(tokenizedLine.nextToken());
   }
}