title: How to read integers from a file using BufferedReader from Java?
body: <p>I am working with BufferedReader in Java and was hoping for some guidance when it comes to reading integers. </p>
  
  <p>To summarize, each line of the input file will represent one edge in an undirected graph. It will contain two integers, the endpoints of the edge, followed by a real number, the weight of the edge. The last line will contain a -1, to denote the end of input. </p>
  
  <p>I have created a BufferedReader object and initialized an integer variable and </p>
  
  <p>The format of the file is as follows: </p>
  
  <pre><code> 0   1    5.0
   1   2    5.0
   2   3    5.0
  ...
   5  10    6.0
   5  11    4.0
  17  11    4.0
  -1
  </code></pre>
  
  <pre><code>public static void processFile(String inputFilePath) throws IOException {
          //Check to see if file input is valid
          if (inputFilePath == null || inputFilePath.trim().length() == 0) {
              throw new IllegalArgumentException("Error reading file.");
          }
  
          //Initialize required variables for processing the file
          int num = 0;
          int count = 0;
  
          try {
              //We are reading from the file, so we can use FileReader and InputStreamReader.
              BufferedReader fileReader = new BufferedReader(new FileReader(inputFilePath));
              //Read numbers from the line
              while ((num = fileReader.read()) != -1) { //Stop reading file when -1 is reached
                  //First input is the start
  
                  //Second input is the end
                  //Third input is the weight
  
  
  
              }
          } catch (IOException e) {
              throw new IOException("Error processing the file.");
          }
      } 
  </code></pre>
  
  <p>This is what I have attempted thus far, but I wondering how I can take each line of code, and have the first number be the "start" variable, the second number be the "end" variable, and the third number be the "weight" variable? I saw some solutions online to create an array but because of the format of my file I am somewhat confused. I can help clarify any details about</p>