Java 在 while 循环中存储值

Question

我是 Java 初学者，我有一项关于循环的作业。我知道这个问题对您来说可能听起来很基础，但我找不到可以理解的答案。我的代码基本上是这样的；

import java.util.Scanner;

public class Histogram
{
  public static void main( String[] args)
  {
    Scanner scan = new Scanner( System.in);

    // Constant

    final String CH = "*";

    // Variables
    int number;
    int count;
    int start;
    int width;
    int line;
    String output;


    // Program Code

    count = 0;
    number = 0;
    start = 1;
    width = 0;
    line = 0;
    output = "";


    // Creating the loop

    while ( start == 1) 
    {
      System.out.println( "Enter the numbers");
      number = scan.nextInt();

      if ( number < 0 )
      {
        start = 0;
      }

      else
      {  
        while ( width < number)
        {
         output = CH + " " ;
         width = width + 1  ;  
         System.out.print(output);
        }
        width = 0;


      }
    }

  }
}

这运行完美，但在每次用户输入后都会打印星星的输出。我想存储每个循环的输出，并在输入负整数时在最后一起打印它们。如何存储我不知道用户将输入多少输出的输出？简而言之，我想要以下输出

Enter the numbers : 3 5 6 4 -1//数字是用户输入的

3 ***5 *****6 ******4 ****

Answer 1

这是答案:

import java.util.Scanner;

public class Histogram
{
  public static void main( String[] args)
  {
    Scanner scan = new Scanner( System.in);

    // Constant

    final String CH = "*";



   int count = 0;
    int number = 0;
    int start = 1;
    int width = 0;
    int line = 0;
    String output = "";
    String store="";


    // Creating the loop

    while ( start == 1) 
    {
      System.out.println( "Enter the numbers");
      number = scan.nextInt();

      if ( number < 0 )
      {
        start = 0;
      }

      else
      {  
        while ( width < number)
        {
         output = CH + " " ;
         width = width + 1  ;  
        store+=output;
        }
        width = 0;


      }
    }
    System.out.print(store);

  }
}