读取由逗号和空格分隔的一行 - java
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reading one line delimited by both comma and space - java
提问by Bpache
I am willing to read a series of number from one line like below in Java:
我愿意在 Java 中从如下一行中读取一系列数字：
1 80,982 163,8164 170,2620
So eventually I want the result array [1, 80, 982, 163, 8164, 170, 2620]
所以最终我想要结果数组 [1, 80, 982, 163, 8164, 170, 2620]
I am thinking about using scanner, but not clear how to implement it in a neat way, can I ask some tips please?
我正在考虑使用扫描仪，但不清楚如何以简洁的方式实现它，我可以问一些提示吗？
Thanks for reading!
谢谢阅读！
回答by Mark Peters
If it were me, I'd read one line using BufferedReaderand then simply use
如果是我，我会阅读一行BufferedReader，然后简单地使用
String[] values = line.split("[, ]");
I usually find Scanneruntidy and overkill.
我通常觉得Scanner不整洁和矫枉过正。
回答by ktm5124
Yes the Scanner class works well with this.
是的， Scanner 类可以很好地处理这个问题。
public static void main(String[] args) throws Exception {
Scanner s = new Scanner(strOrFile).useDelimiter(",| ");
List<Integer> myList = new ArrayList<Integer>();
while (s.hasNext()) {
myList.add(s.nextInt());
}
}
It works especially well if you're reading from a file. (Cuts down the work for you.)
如果您从文件中读取，它的效果特别好。（为您减少工作量。）
回答by rdcrng
回答by Evgeniy Dorofeev
Since you want String[] the best solution is String.split
因为你想要 String[] 最好的解决方案是 String.split
String[] s = str.split("[ ,]+");
回答by Rais Alam
Split your string with below regex.
用下面的正则表达式拆分你的字符串。
String input = "1 80,982 163,8164 170,2620 ";
String[] values = input.split("\s*(,|\s)\s*");
for(String val: values)
{
System.out.println(val);
}
I matches following criteria.
我符合以下条件。
- Zero or more white space
(,|\\s). If you have more that one separator you can include in bracket like(&|,|@|\\s). - Comma and white space.
- 零个或多个空白
(,|\\s)。如果您有多个分隔符，您可以将其包含在括号中，例如(&|,|@|\\s). - 逗号和空格。
Check the fiddle here.
检查小提琴here。
回答by Achintya Jha
try this:
试试这个：
public static void main(String[] args) {
String str = "1 80,982 163,8164 170,2620";
String[] s = str.split(" |,");
for(String ss:s)
System.out.println(ss);
}
回答by Sanath
String ss = "1 80,982 163,8164 170,2620";
ss = ss.replaceAll(" ", ",");
String arr[] = ss.split(",");
for (int i=0;i<arr.length;i++) {
System.out.println("line "+arr[i]);
}
回答by MantaMan
For a simple input file with some commas, spaces, and commas with spaces, then regex of Rais and that of Evgeniy both worked with split. In the latter case, the + sign is critical. None of the other options worked for this data: 1.0 2.0 3.0 4.0 5.0,6.0 7.0 8.0 9.0 10.0, 11.0 12.0
对于带有一些逗号、空格和带有空格的逗号的简单输入文件，Rais 的正则表达式和 Evgeniy 的正则表达式都使用 split。在后一种情况下，+ 号至关重要。其他选项均不适用于此数据：1.0 2.0 3.0 4.0 5.0,6.0 7.0 8.0 9.0 10.0, 11.0 12.0
