import java.io.*; 
public class Foo{ 
	private byte[] b; 
	private int length; 

	Foo(){ 
		length = 40; 
		b = new byte[length];
		} 

	public void bar(){ 
		int y; 
		try { 
			FileInputStream x = new FileInputStream("z"); 
			x.read(b,0,length); 
			x.close(); 
		} catch(Exception e){ 
			System.out.println("Oopsie"); 
		} 

		for(int i = 1; i <= length; i++){ 
			if (Integer.toString(50) == Byte.toString(b[i])) 
				System.out.print(b[i] + " "); 
		} 
	} 
}