在java中打印最小的数字

Question

我需要接受用户输入并让程序通过所有方法和东西来运行它以输出最大和最小的数字。我让它打印最大的，但它总是有最小的 0。这可能很容易解决，但现在是季度末，我强调要完成最后一个。这是我的代码。

import java.io.*;

import java.util.*;

public class P4_6

{

  private int sum;

  private int count;

  private int largest = Integer.MIN_VALUE;

  private int smallest = Integer.MAX_VALUE;

  public P4_6()

  {

    sum = 0;

    largest = 0;

    smallest = 0;

    count = 0;

  }

  public void addValue(int x)

  {

    smallest = Math.min(smallest, x);

    largest = Math.max(largest, x);

    sum = sum + x;

    count++;

  }

  public int getSum()

  {

    return sum;

  }

  public int getLargest()

  {

    return largest;

  }

  public int getSmallest()

  {

    return smallest;

  }

  public static void main(String[] args)

  {

    Scanner kbreader = new Scanner(System.in);

    System.out.println("Enter your first integer: ");

    int num1 = kbreader.nextInt();

    System.out.println("Enter your second integer: ");

    int num2 = kbreader.nextInt();

    System.out.println("Enter your third integer: ");

    int num3 = kbreader.nextInt();

    System.out.println("Enter your fourth integer: ");

    int num4 = kbreader.nextInt();

    P4_6 data = new P4_6();

    data.addValue(num1);

    data.addValue(num2);

    data.addValue(num3);

    data.addValue(num4);

    System.out.println("The largest was " + data.getLargest());

    System.out.println("The smallest was " + data.getSmallest());

  }

Answer 1

您不需要使用无参数构造函数。Java 编译器默认添加 No-argument Constructor 。您可以删除以下部分。public P4_6(){ sum = 0; largest = 0; smallest = 0; count = 0;}如果你想在你的代码中保留这部分，那么你应该像下面一样初始化你的变量public P4_6(){ sum = 0; largest = Integer.MIN_VALUE; smallest = Integer.MAX_VALUE; count = 0;}

Answer 2

您不需要初始化“最小”和“最大”。只需删除它们public Test()    {        sum = 0;        //largest = 0;        //smallest = 0;        count = 0;    }