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Categories / Java / File Input Output

 

Use DataInputStream to create double

import java.io.DataInputStream; import java.io.FileInputStream; public class Main {   public static void main(String[] argv) throws Exception {     FileInputStream fileIn = new FileInputStream("data.txt");     DataInputStream dataIn = new DataInputStream(fileIn);     System.out.println(dataIn.readUTF());     int counter = dataIn.readInt();     double sum = 0.0;     for (int i = 0; i < counter; i++) {       double current = dataIn.readDouble();       System.out.println("Just read " + current);       sum += current;     }     System.out.println("\nAverage = " + sum / counter);     dataIn.close();     fileIn.close();   } }