Source Code : Data file

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Data file

  

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class DataFileTest {
  static void writeData(Employee e, PrintWriter out) throws IOException {
    e.writeData(out);
  }

  static Employee readData(BufferedReader in) throws IOException {
    Employee e = new Employee();
    e.readData(in);
    return e;
  }

  public static void main(String[] args) {
    Employee staff = new Employee("Java Source", 35500);

    staff.raiseSalary(5.25);

    try {
      PrintWriter out = new PrintWriter(new FileWriter("employee.dat"));
      writeData(staff, out);
      out.close();
    } catch (IOException e) {
      System.out.print("Error: " + e);
      System.exit(1);
    }

    try {
      BufferedReader in = new BufferedReader(new FileReader(
          "employee.dat"));
      Employee e = readData(in);
      e.print();
      in.close();
    } catch (IOException e) {
      System.out.print("Error: " + e);
      System.exit(1);
    }
  }
}

class Employee {

  private String name;

  private double salary;

  public Employee(String n, double s) {
    name = n;
    salary = s;
  }

  public Employee() {
  }

  public void print() {
    System.out.println(name + " " + salary );
  }

  public void raiseSalary(double byPercent) {
    salary *= 1 + byPercent / 100;
  }

  public void writeData(PrintWriter out) throws IOException {
    out.println(name + "|" + salary);
  }

  public void readData(BufferedReader in) throws IOException {
    String s = in.readLine();
    StringTokenizer t = new StringTokenizer(s, "|");
    
    name = t.nextToken();
    
    salary = Double.parseDouble(t.nextToken());
  }

}


           
         
    
  

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