Java Is Jar File isJar(File file)

Description

Test if a file looks like it contains a Jar

License

Apache License

Parameter

Parameter	Description
file	the file to test

Return

true if can be opened as a Jar

Declaration

public static boolean isJar(File file) 

Method Source Code

//package com.java2s;
/*/*from w  w  w .  j  a  v  a  2 s  . c  o m*/
 * Copyright 2015 Kevin Jones
 *
 * 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.
 */

import java.io.*;

import java.util.jar.JarFile;

public class Main {
    /**
     * Test if a file looks like it contains a Jar
     * @param file the file to test
     * @return true if can be opened as a Jar
     */
    public static boolean isJar(File file) {
        try {
            new JarFile(file);
            return true;
        } catch (Exception e) {
            // Ignore
        }
        return false;
    }
}

Related

1. isJar(File file)
2. isJar(File file)
3. isJar(final File element)
4. isJar(InputStream is)
5. isJar(String file)
6. isJarFile(File f)