Java Long Number Create toLong(String value)

Description

Converts a given string into type long.

License

Apache License

Parameter

Parameter	Description
value	a parameter

Return

the string value as long or -1 if cannot be converted

Declaration

public static long toLong(String value) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2012 Christian Ternes/*from ww w.  java 2  s.  c  om*/
 * 
 * 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.
 ******************************************************************************/

public class Main {
    /**
     * Converts a given string into type long.
     * If string is not a long, -1 will be returned.
     * 
     * @param value
     * @return the string value as long or -1 if cannot be converted
     */
    public static long toLong(String value) {
        if (isLong(value)) {
            return Long.parseLong(value);
        }
        return -1;
    }

    /**
     * Checks if a given string is of type long.
     * 
     * @param value
     * @return true if string is of type long, false otherwise
     */
    public static boolean isLong(String value) {
        try {
            Long.parseLong(value);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }
}

Related

1. toLong(String val)
2. toLong(String value)
3. toLong(String value)
4. toLong(String value)
5. toLong(String value)
6. toLong(String value, long _default)
7. toLong(String value, long def)
8. toLong(String value, Long defaultValue)
9. toLong(String value, long defaultValue)