[Java] Cannot draw pixels
- by Wilhelm
Hello everyone.
I want to print each digit of pi number as a colored pixel, so, I get na input, with the pi number, then parse it into a list, each node containing a digit (I know, I'll use an array later), but I never get this painted to screen... Can someone help me to see where I'm wrong?
package edu.pi.view;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JPanel
{
private static final long serialVersionUID = 6416932054834995251L;
private static int pixels[];
private static List<Integer> pi;
public static void readFile(String name)
{
File file = new File(name);
BufferedReader reader = null;
pi = new ArrayList<Integer>();
char[] digits;
try
{
reader = new BufferedReader(new FileReader(file));
String text = null;
while((text = reader.readLine()) != null)
{
digits = text.toCharArray();
for(char el : digits)
if(el != ' ')
pi.add(Character.getNumericValue(el));
}
} catch (Exception e)
{
e.printStackTrace();
}
}
public void paint(Graphics gg)
{
readFile("c:\\pi.txt");
int h = 5;
int w = 2;
int color = 0xffffff;
int digit;
int i = 0;
pixels = new int[w * h];
for (int y = 0; y < h; y++)
{
for (int x = 0; x < h; x++)
{
digit = pi.get(i);
if(digit == 0)
color = 0x000000;
else if(digit == 1)
color = 0x787878;
else if(digit == 2)
color = 0x008B00;
else if(digit == 3)
color = 0x00008B;
else if(digit == 4)
color = 0x008B8B;
else if(digit == 5)
color = 0x008B00;
else if(digit == 6)
color = 0xCDCD00;
else if(digit == 7)
color = 0xFF4500;
else if(digit == 8)
color = 0x8B0000;
else if(digit == 9)
color = 0xFF0000;
pixels[i] = color;
i++;
}
}
Image art = createImage(new MemoryImageSource(w, h, pixels, 0, w));
gg.drawImage(art, 0, 0, this);
}
public static void main(String[] args)
{
JFrame frame = new JFrame();
frame.getContentPane().add(new Main());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,300);
frame.setVisible(true);
}
}
