Tests if a string is numeric, i.e. contains only digit characters : String « Date Type « Android






  1. Android
  2. Date Type
  3. String

Tests if a string is numeric, i.e. contains only digit characters

    
/*
 * Copyright (C) 2009 Teleca Poland Sp. z o.o. <android@teleca.com>
 *
 * 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.
 */
class Main{

    /**
     * Tests if a string is numeric, i.e. contains only digit characters
     * @param string string to test
     * @return true if only digit chars, false if empty or null or contains non-digit chrs
     */
    public static boolean isNumeric(String string) {
        if (string == null || string.length() == 0)
            return false;

        int l = string.length();
        for (int i = 0; i < l; i++) {
            if (!Character.isDigit(string.codePointAt(i)))
                return false;
        }
        return true;
    }

}








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