Regular expression image file extension pattern
([^\s]+(\.(?i)(jpg|png|gif|bmp))$) |
This regular expression refers to a pattern which must have 1 or more strings (but not white space), follow by dot “.” and string end in “jpg” or “png” or “gif” or “bmp”, and the file extensive is case-insensitive.
Example
package com.w3spoint; import java.util.ArrayList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexTest { private static final String PATTERN = "([^\\s]+(\\.(?i)(jpg|png|gif|bmp))$)"; public static void main(String args[]){ List<String> values = new ArrayList<String>(); values.add("jai.jpg"); values.add("java.png"); values.add("a.txt"); values.add("a.mp3"); Pattern pattern = Pattern.compile(PATTERN); for (String value : values){ Matcher matcher = pattern.matcher(value); if(matcher.matches()){ System.out.println("File "+ value +" is valid image"); }else{ System.out.println("File "+ value +" is invalid image"); } } } } |
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