添加用户输入升序的代码

Question

import java.util.Scanner;
import java.util.Arrays;
public class searchSorting 
{
    public static void main (String[]args)
    {
        String line;
        Scanner in = new Scanner(System.in);

        System.out.print("How many numbers you want to input?: ");
        line = in.nextLine();
        System.out.print("Input Number 1: " );
        line = in.nextLine();
        System.out.print("Input Number 2: ");
        line = in.nextLine();
        System.out.print("Input Number 3: " );
        line = in.nextLine();
        System.out.print("Input Number 4: ");
        line = in.nextLine();
        System.out.print("Input Number 5: " );
        line = in.nextLine();
    }
    public static void sortAscending (double[]arr)
    {
        Arrays.sort(arr); 
        System.out.printf("Sorted arr[] = %s", 
        Arrays.toString(arr)); 

}}

我被困在将用户输入的内容按升序排列的代码上。我已经查找并按升序尝试了多种资源，但似乎没有任何效果。我试过了：

System.out.print("Input number 1: "+(i+1+":");

尝试添加输入而不是全部写出，但我是一个未知变量。

Answer 1

您应该使用数组来存储输入并使用循环来读取输入。

System.out.print("How many numbers you want to input?: ");
int num = in.nextInt();
double[] arr = new double[num];
for(int i = 0; i < num; i++){
   arr[i] = in.nextDouble();
}
sortAscending(arr);

Answer 2

你必须创建一个数组。然后将您正在读取的内容放入数组中，然后调用您的方法。

System.out.print("How many numbers you want to input?: ");
int amount = Integer.parseInt(in.nextLine());
double[] values = new double[amount];

for (int i = 0; i < values.length; i++) {
    System.out.print("Input Number " + i + ": ");
    values[i] = Double.parseDouble(in.nextLine());
}

sortAscending(values);

---

注意sortAscending这个名字并不准确，它不仅仅是排序（然后返回结果或就地），还有打印。所以也许你应该把它重命名为sortAndPrintAscending。或者只是对其进行排序，然后让您的main 方法打印。

或者完全放弃它，该方法实际上并没有任何用途，因为它只是调用Arrays.sort，还不如在main中这样做：

System.out.print("How many numbers you want to input?: ");
int amount = Integer.parseInt(in.nextLine());
double[] values = new double[amount];

for (int i = 0; i < values.length; i++) {
    System.out.print("Input Number " + i + ": ");
    values[i] = Double.parseDouble(in.nextLine());
}

Arrays.sort(values);
System.out.println("Sorted: " + Arrays.toString(values));