Pls Help JAVA Program Headaches Not Giving me the right output for user input

[KCC1982]

Hi,
I just want to say thank you in advance to anyone that replies to this. I'm new to JAVA & my 4th assignment has got me stumped. I have to write a program that reads 4 integers and prints the largest and smallest value that the user entered (using joption pane) with no if statements. I also have to modify the addValue method with Math.min & Math.max methods. So far the computer is not responding to the users' input and giving me -.2147483648 for the smallest and .2147483647 for the largest. Please do not laugh I am just starting out. Once again any insight or help will be greatly appreciated. My soucre code is as follows:

class DataSet
{

private int smallest;
private int largest;


//The constructor

public DataSet()
{
smallest = Integer.MIN_VALUE;
largest = Integer.MAX_VALUE;
}

public void addValue(int x)
{
smallest = Math.min(smallest,largest);
largest = Math.max(smallest,largest);
}

public int getSmall()
{

return Math.min(smallest,largest);
}

public int getLarge()
{

return Math.max(smallest,largest);
}

}

import javax.swing.JOptionPane;

class DataSetTest
{
public static void main(String[] args)
{

DataSet myDataSet = new DataSet();

String input = JOptionPane.showInputDialog(
"Please enter the first number:");
int number1 = Integer.parseInt(input);

input = JOptionPane.showInputDialog(
"Please enter the second number:");
int number2 = Integer.parseInt(input);

input = JOptionPane.showInputDialog(
"Please enter the third number:");
int number3 = Integer.parseInt(input);

input = JOptionPane.showInputDialog(
"Please enter the fourth number:");
int number4 = Integer.parseInt(input);

myDataSet.addValue(number1);
myDataSet.addValue(number2);
myDataSet.addValue(number3);
myDataSet.addValue(number4);

System.out.println("The smallest number is " + myDataSet.getSmall());
System.out.println("The largest number is " + myDataSet.getLarge());

System.exit(0);
}
}

[morans]

public void addValue(int x)
{
smallest = Math.min(smallest,largest);
largest = Math.max(smallest,largest);
}

should be

public void addValue(int x)
{
smallest = Math.min(smallest, x);
largest = Math.max(largest, x);
}