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var numericString = testString.replace(/[^0-9]/g, ''); return numericString; }. This function uses the replace method and the /[^0-9]/g,'' Regular Expression to remove non-numeric characters from the testString variable passed in the parameter list.Save the document and launch your browser. Open the document in your browser.ips & Warnings. 1  This example runs the removeNonNumeric function when the Web page loads. 2  Remove the first three lines of code before that function to stop that from happening. 3  To use the function in production, call the function and pass it a string containing text.
Java String provides a lot of concepts that can be performed on a string such as compare, concat, equals, split, length, replace, compareTo, intern, substring etc. In java, string is basically an object that represents sequence of char values.An array of characters works same as java string.For example: is same as: The java.lang.String class implements Serializable, Comparable and CharSequence interfaces.n java, string is basically an object that represents sequence of char values. An array of characters works same as java string. For example: is same as: The java.lang.String class implements Serializable, Comparable and CharSequence interfaces.