I need some help guys..

[nish]

I am currently studying java and i came across a question.

The following program has several defects (errors) that will generate compile-time errors, logical errors (unintended behaviour) or run-time errors (forced termination). Identify and correct 5 such defects by rewriting this program and identifying and correcting the errors. You may identify an error (and the fix for it) using a comment directly above the line that was corrected.
import java.io.*;
/* Read a sequence of positive integers from standard input
** one integer per line, terminating with 0, and print the
** minimum, maximum and sum of the integers to standard output
*/
public class Main {
private BufferedReader in;
public static void main(String[] args) throws IOException {
Main app = new Main();
app.run();
}

public Main() {
in = new BufferedReader(new StreamInputReader(System.in));
}
public void run() {
int min = 0;
int max = 0;
int sum = 0;
number = Integer.parseInt(in.readLine());
while(number > 0) {
if (number > max) {
max = number;
}
if (number < min) {
min = number;
}
sum = sum + number;
}
System.out.println(“Minimum: “ + min);
System.out.println(“Maximum: “ + max);
System.out.println(“Sum: “ + sum);
}
}

I only seem to find one error in this.Can you guys help me out with this?

[Banfa]

What is the error that you see?

[nish]

instead of
private BufferedReader in;
public static void main(String[] args) throws IOException {
Main app = new Main();
app.run();

I thought it could go like

public static void main(String[] args) throws IOException {
BufferedReader in = new BufferedReader(
new StreamInputReader(System.in));
int min = 0;
int max = 0;
int sum = 0;

[Banfa]

OK well that may be, I am not a Java programmer but a C programmer so that is behond what I know but it that correction fixes a compiler error or a run time error then it's good, I don't think it fixes a logic error.

However the syntax of the language is close enough for me to see at least 2 logic errors.

In the function public void run() consider

1. What will happen to the variable min if none of the inputs are < 0 and none of them will be as a negitive number is used as the end condition of the loop?

2. What will happen in the while loop if the first input is < 0?

3. Is in.readLine() garuntteed to return digits only, what happens if "the" is returned bu in.readLine()?