/
CircleDrawer.java
71 lines (67 loc) · 1.68 KB
/
CircleDrawer.java
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
import java.io.*;
import java.util.*;
public class CircleDrawer {
public static final String DELIM = "\t";
public static void main(String[] args) {
// TODO Auto-generated method stub
writeToFile(CircleDrawer.makePoints(10, 20, 30, 40), "Circle.txt");
}
public static void writeToFile(Point[] points, String fileName)
{
try
{
PrintWriter fileWriter = new PrintWriter(new FileOutputStream(fileName));
for(Point p : points)
{
fileWriter.println(p.getX() + DELIM + p.getY());
}
fileWriter.close();
}
catch(Exception e)
{
System.out.println(e);
}
}
public static Point[] makePoints(double x, double y, double r, int numP)
{
if(numP <= 0)
return null;
Point[] retP = new Point[numP];
for(int i = 0; i < numP; i++)
{
retP[i] = new Point(x + Math.cos((double)i/(double)numP) * Math.PI * 2, y + Math.sin((double)i/(double)numP) * Math.PI * 2);
}
return retP;
}
public static Point[] readFromFile(String fileName)
{
try
{
Scanner fileScanner = new Scanner(new File(fileName));
int count = 0;
while(fileScanner.hasNextLine())
{
count++;
fileScanner.hasNextLine();
}
fileScanner = new Scanner(new File(fileName));
Point[] retP = new Point[count];
count = 0;
while(fileScanner.hasNextLine())
{
String line = fileScanner.nextLine();
String[] splitLine = line.split(DELIM);
if(splitLine.length != 2)
continue;
retP[count++] = new Point(Double.parseDouble(splitLine[0]), Double.parseDouble(splitLine[1]));
}
fileScanner.close();
return retP;
}
catch(Exception e)
{
System.out.println(e);
}
return null;
}
}