Android File Extension Name Get isValidFileExtension(String extension)

Description

Checks if the extension is valid.

License

Apache License

Parameter

Parameter	Description
extension	The file extension to validate

Return

True if its valid, otherwise false

Declaration

public static boolean isValidFileExtension(String extension) 

Method Source Code

//package com.java2s;
/*// w  w w  . ja  v  a 2  s . c  o  m
 * #%L
 * ch-commons-util
 * %%
 * Copyright (C) 2012 Cloudhopper by Twitter
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

public class Main {
    /**
     * Checks if the extension is valid.  This method only permits letters, digits,
     * and an underscore character.
     * @param extension The file extension to validate
     * @return True if its valid, otherwise false
     */
    public static boolean isValidFileExtension(String extension) {
        for (int i = 0; i < extension.length(); i++) {
            char c = extension.charAt(i);
            if (!(Character.isDigit(c) || Character.isLetter(c) || c == '_')) {
                return false;
            }
        }
        return true;
    }
}

Related

1. getNameMinusExtension(File file)
2. getPathExtension(final String path)
3. getSuffix(String f)
4. hasExtension(String filename, String extension)
5. indexOfExtension(String filename)
6. parseFileExtension(String filename)
7. parseFileExtension(String filename)
8. removeExtension(String file)
9. removeExtension(String s)