Java-如何按整数序列查找最小值和最大值？

Question

我对编码很新,我试图通过使用Math.min和Math.max方法找到整数序列的最小值和最大值.我想我已经找到了大部分的东西,但是当我测试它时,最小值是-2147483648,最大值是2147483647.我怎么能改变它？这是代码:

/**
 * 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");
    }
}

Answer 1

交换初始条件smallest和largest.更改

private int smallest = Integer.MIN_VALUE;
private int largest = Integer.MAX_VALUE;

至

private int smallest = Integer.MAX_VALUE;
private int largest = Integer.MIN_VALUE;

因为没有int值小于MIN_VALUE(或大于MAX_VALUE).