Is it possible to read a file from Method?

Question

Hello people,
I will be much grateful for your help!
I try to read file from one of the methods of the class.
It is compilated but doesn't work?
Who knows what's the matter?
public void fillSinglePoly()
String s1;
int [] migi;
int line_number;
try
migi=new int[500];
FileInputStream is=new FileInputStream("pereb.txt");
BufferedReader ds=new BufferedReader(new InputStreamReader(is));
line_number=0;
while((line_str=ds.readLine())!=null)
s1=(line_str.substring(0,2)).trim();
migi[line_number]=Integer.valueOf(s1).intValue();
line_number=line_number+1;
ds.close();
catch(IOException e)
System.out.println("File erroe"+e);

Answer 1

public void fillSinglePoly()
  String s1 = null;
  int [] migi;
  int line_number = 0;
  String line_str = null;
try
  migi = new int[500];
  FileInputStream is = new FileInputStream("pereb.txt");
  BufferedReader ds = new BufferedReader(new  InputStreamReader(is));
  line_number = 0;
  while ((line_str = ds.readLine()) != null)
    s1 = (line_str.substring(0,2)).trim();
    migi[line_number] = Integer.parseInt(s1);
    ++line_number;
  ds.close();
catch(IOException e)
  System.out.println("File erroe"+e);
}