Question

I want to check whether a string contains # or not.
Then if it contains #, I want to find the content after #.

For example,

• test#1 — This should return me 1.
• test*1 — This should not return anything.
• test#123Test — This should return 123Test.

Please let me know. Thanx in advance.

Answer 1

// Compile a regular expression: A hash followed by any number of characters
Pattern p = Pattern.compile("#(.*)");

// Match input data
Matcher m = p.matcher("test#1");

// Check if there is a match
if (m.find()) {

  // Get the first matching group (in parentheses)
  System.out.println(m.group(1));
}