从字符串中取不同的值，并将其转换为双精度值 [英] Take different values from a String and convert them to Double Values

问题描述

在我的code，我要求用户通过一个空格分割的输入三个不同的值。
然后，这三个不同的价值观，我想将它们分配给三种不同的双击变量。

我已经通过分配字符串的第一个字符到我的double变量试过，但我一直没能成功。

有什么建议？

感谢您！

下面是我想要做的：

  INT决策=消息（）;
串newDimensions;
双newHeight，newWidth，满足newLength;如果（判断== 1）{
  newDimensions = JOptionPane.showInputDialog（请输入要添加所需量的+
                                            \\ n要每个维度。 +
\\ n注意：一是值是高度，第二个用于宽度，第三个用于长度+
\\ n并，输入信息必须具有各值之间的空白空间。 +
\\ n例如：4 8 9）;newHeight = Double.parseDouble（newDimensions.charAt（0））;
 

解决方案

获取输入，用空格分开，并分析每个双人间。这code没有消毒的输入。

 字符串输入=12.4 19.8776 23.3445
        的String [] =拆分input.split（）;
        对于（一个String：分）
        {
            的System.out.println（Double.parseDouble（S））;
        }
 

In my code, I'm asking the user to input three different values divided by a blank space. Then, those three different values I would like to assign them to three different Double variables.

I have tried by assigning the first character of such string to my double variables but I haven't been able to succeed.

Any suggestions?

Thank you!

Here is what I'm trying to do:

int decision = message();
String newDimensions;
double newHeight, newWidth, newLength;

if(decision == 1){
  newDimensions = JOptionPane.showInputDialog("Please enter the desired amount to be added" + 
                                            "\nto each dimension." +
"\nNOTE: First value is for Height, second for Width, third for Length" +
"\nAlso, input information has to have a blank space between each value." +
"\nEXAMPLE: 4 8 9");

newHeight = Double.parseDouble(newDimensions.charAt(0));

解决方案

Get the input, split it by a whitespace and parse each Double. This code does not sanitize the input.

        String input = "12.4 19.8776 23.3445";
        String[] split = input.split(" ");
        for(String s : split)
        {
            System.out.println(Double.parseDouble(s));
        }

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