CODEWITHSUNDEEP
javaregexstringsplit
Raymond Osterbrink
Raymond Osterbrink

Reputation: 540

How to split a String of numbers and chars, only by chars

i need to split a String into parts of number sequences and chars between them. Something like this:

input:    "123+34/123(23*12)/100"

output[]:["123","+","34","/","123","(","23","*","12",")","/","100"]

Is this somehow possible, or is it possible to split a String by multiple chars? Otherwise, is it possible to loop through a String in Java?

Upvotes: 1

Views: 92

Answers (2)

Avinash Raj
Avinash Raj

Reputation: 174696

Use a lookahead assertion based regex for splitting the input string.

String input = "123+34/123(23*12)/100";
System.out.println(Arrays.toString(input.split("(?<=[/)+*])\\B(?=[/)+*])|\\b")));

Output:

[123, +, 34, /, 123, (, 23, *, 12, ), /, 100]

Upvotes: 0

M A
M A

Reputation: 72844

You can use a regular expression.

String input = "123+34/123(23*12)/100";
Pattern pattern = Pattern.compile("\\d+|[\\+\\-\\/\\*\\(\\)]");
Matcher matcher = pattern.matcher(input);
while(matcher.find()) {
    System.out.println(matcher.group());
}

Upvotes: 3

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