java 如何将一行中输入的逗号分隔的数字输入到Java中的数组中
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how to get numbers separated by comma entered in a line into an array in Java
提问by miatech
how could I get values entered in a single line by the user eq: 1, 3, 400, 444, etc.. into an array. I know I must declare a separator in this case the comma ",". Could someone help
我怎样才能将用户在一行中输入的值 eq: 1, 3, 400, 444 等...放入一个数组中。我知道在这种情况下我必须声明一个分隔符逗号“，”。有人可以帮忙吗
Thanks
谢谢
回答by Tomasz Nurkiewicz
String input = "1, 3, 400, 444";
String[] numbers = input.split("\s*,\s*");
You can use much simpler separator in String.split()like ","but the more complex "\\s*,\\s*"additionally strips whitespaces around comma.
您可以在String.split()like 中使用更简单的分隔符，","但更复杂的分隔符"\\s*,\\s*"还会去除逗号周围的空格。
回答by óscar López
Try this:
试试这个：
String line = "1, 3, 400, 444";
String[] numbers = line.split(",\s+");
int[] answer = new int[numbers.length];
for (int i = 0; i < numbers.length; i++)
answer[i] = Integer.parseInt(numbers[i]);
Now answeris an array with the numbers in the string as integers. The other answers just split the string, if you need actual numbersyou need to convert them.
现在answer是一个数组，字符串中的数字为整数。其他答案只是拆分字符串，如果您需要实际数字，则需要转换它们。
System.out.println(Arrays.toString(answer));
> [1, 3, 400, 444]
回答by isvforall
String line = "1, 3, 400, 444";
for(String s : line.split(","))
System.out.println(s);
回答by user1112699
String input = "1, 3, 400, 444";
String[] numbers = input.split("\s*,\s*");
It's the right answer, "\\s*,\\s*" is a regular expression, regex is very useful for the string parsing.
这是正确的答案，"\\s*,\\s*" 是正则表达式，正则表达式对于字符串解析非常有用。
