Java-如何按整数序列查找最小值和最大值？

/**
 * A class to find largest and smallest values of a sequence.
 **/
public class DataSet
{
  private int smallest = Integer.MIN_VALUE;
  private int largest = Integer.MAX_VALUE;
  /**
   * Adds in integer to sequence.
   * @param x the integer added
   */
  public void addValue(int x)
   {
    smallest = Math.min(smallest,x);
    largest = Math.max(largest,x);
   }
  /**
   * Returns the smallest value.
   * @return the smallest value
   */
  public int getSmallest() 
   {
    return smallest;
   }
  /**
   * Returns the largest value.
   * @return the largest value
   */
  public int getLargest()
    {
      return largest;
    }
}

这是测试人员：

/**
 * A class to test the DataSet class.
 */
public class DataSetTester
{
    public static void main(String[] args)
    {
        DataSet myData = new DataSet();
        myData.addValue(11);
        myData.addValue(4);
        myData.addValue(6);
        myData.addValue(9);
        System.out.println("Smallest: " + myData.getSmallest());
        System.out.println("Expected: 4");
        System.out.println("Largest: " + myData.getLargest());
        System.out.println("Expected: 11");
    }
}