forked from mthli/Java
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathTextFileTest.java
More file actions
98 lines (86 loc) · 2.74 KB
/
Copy pathTextFileTest.java
File metadata and controls
98 lines (86 loc) · 2.74 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
package textFile;
import java.io.*;
import java.util.*;
/**
* @version 1.13 2012-05-30
* @author Cay Horstmann
*/
public class TextFileTest
{
public static void main(String[] args) throws IOException
{
Employee[] staff = new Employee[3];
staff[0] = new Employee("Carl Cracker", 75000, 1987, 12, 15);
staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
staff[2] = new Employee("Tony Tester", 40000, 1990, 3, 15);
// save all employee records to the file employee.dat
try (PrintWriter out = new PrintWriter("employee.dat", "UTF-8"))
{
writeData(staff, out);
}
// retrieve all records into a new array
try (Scanner in = new Scanner(
new FileInputStream("employee.dat"), "UTF-8"))
{
Employee[] newStaff = readData(in);
// print the newly read employee records
for (Employee e : newStaff)
System.out.println(e);
}
}
/**
* Writes all employees in an array to a print writer
* @param employees an array of employees
* @param out a print writer
*/
private static void writeData(Employee[] employees, PrintWriter out) throws IOException
{
// write number of employees
out.println(employees.length);
for (Employee e : employees)
writeEmployee(out, e);
}
/**
* Reads an array of employees from a scanner
* @param in the scanner
* @return the array of employees
*/
private static Employee[] readData(Scanner in)
{
// retrieve the array size
int n = in.nextInt();
in.nextLine(); // consume newline
Employee[] employees = new Employee[n];
for (int i = 0; i < n; i++)
{
employees[i] = readEmployee(in);
}
return employees;
}
/**
* Writes employee data to a print writer
* @param out the print writer
*/
public static void writeEmployee(PrintWriter out, Employee e)
{
GregorianCalendar calendar = new GregorianCalendar();
calendar.setTime(e.getHireDay());
out.println(e.getName() + "|" + e.getSalary() + "|" + calendar.get(Calendar.YEAR) + "|"
+ (calendar.get(Calendar.MONTH) + 1) + "|" + calendar.get(Calendar.DAY_OF_MONTH));
}
/**
* Reads employee data from a buffered reader
* @param in the scanner
*/
public static Employee readEmployee(Scanner in)
{
String line = in.nextLine();
String[] tokens = line.split("\\|");
String name = tokens[0];
double salary = Double.parseDouble(tokens[1]);
int year = Integer.parseInt(tokens[2]);
int month = Integer.parseInt(tokens[3]);
int day = Integer.parseInt(tokens[4]);
return new Employee(name, salary, year, month, day);
}
}