Question

所以我有这个项目要求我生成一个用户指定长度的单维数组，然后让用户填充数组，我无法弄清楚我应该做什么在

import java.util.*;

public class singledimensionalarray {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner keyboard = new Scanner (System.in);
        System.out.println("Please input array length: ");
        String[] SDArray= new String[keyboard.nextInt()];
        System.out.println("Please input " + SDArray.length + " double numbers:");
        int n = 0;
        for (n = 0; n <= SDArray.length; n++){
            SDArray.add (keyboard.nextDouble()); //keep getting an error here
        }

    }

}

Answer 1

尝试

import java.util.*;

public class singledimensionalarray {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner keyboard = new Scanner (System.in);
        System.out.println("Please input array length: ");
        double[] SDArray= new double[keyboard.nextInt()];
        System.out.println("Please input " + SDArray.length + " double numbers:");
        for (int n = 0; n < SDArray.length; n++){
            SDArray[n] = (keyboard.nextDouble());
        }
        keyboard.close();
    }

}

Answer 2

首先请不要使用n编写for循环。用字母i。其次，您尝试在String数组中存储double值。用户究竟想用数组填充数组？

编辑：这是我写过的唯一答案。我是大学二年级学生，并不是特别精通java。请为耶稣的爱打开我的帐户。我花了一个小时写了一个经过深思熟虑的答案，只是为了让它被封锁，因为这个单一的答案。

Answer 3

好吧，所以我最终做的就是Patrick和Khachik所说的;这就是我所拥有的

import java.util。*;

public class singledimensionalarray {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    Scanner keyboard = new Scanner (System.in);
    System.out.println("Please input array length: ");
    double[] SDArray= new double[keyboard.nextInt()];
    System.out.println("Please input " + SDArray.length + " double numbers:");
    for (int n = 0; n < SDArray.length; n++){
        SDArray[n] = (keyboard.nextDouble());
    }
    keyboard.close();
    System.out.print("After reversal:");
    for (int i = SDArray.length - 1; i >= 0; i--) {
         System.out.print(SDArray[i]+",");

}

} }

感谢您的帮助！

如何将用户输入添加到数组java？

3 个答案: