How to throw or catch IOException?

Question

Hi,
I am very simply trying to write a method for a class to print the objects info to a file (to test a hw assignment, don't worry, it's not the actual assignment, so I'm not trying to get anyone to do my work for me =D). Unfortunately, since I'm declaring the printwriter outside of any method, I can't figure out how to deal with the "Slider.java:35: unreported exception java.io.IOException; must be caught or declared to be thrown" message the compiler gives.
here is the important part of the code, any suggestions?:
import java.util.*;
import java.io.*;
public class Slider     
//          Instance Data Members     
String slider[][];
int size;
PrintWriter toFile = new PrintWriter(new FileWriter("moves.txt"), true);                    
public Slider(int s)
size = s;
slider = new String[size][size];
iblank = size-1;
jblank = size-1;
for (int i=0; i<size; i++)
for (int j=0; j<size ; j++)
slider[i][j]= Integer.toString(i*size + j + 1);
slider[iblank][jblank] = "";
          public void printToFile()     throws IOException
for (int i=0; i<size ; i++)
for (int j=0; j<size ; j++)
{     toFile.printf("%4s", slider[i][j]);     }
toFile.println();
toFile.println();
}

Answer 1

and format your code properly FFS... and post it between code tags
* prints the matrix to the given PrintWriter
* @param writer PrintWriter - to write to.
public void print(PrintWriter writer) throws IOException {
  for (int i=0; i<size ; i++) {
    for (int j=0; j<size ; j++) {
      writer.printf("%4s", slider[i][j]);
    writer.println();
  toFile.println();
}... and just pass the PrintWriter into the print method