Java Is Jar File isJar(InputStream is)

Description

Check if this inputstream is a jar/zip

License

Apache License

Parameter

Parameter	Description
is	a parameter

Return

true if inputstream is a jar

Declaration

public static boolean isJar(InputStream is) 

Method Source Code

//package com.java2s;
/*//from   ww w  .  ja va2  s  .c  om
 * ClasspathUtils.java
 * 
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * 
 * 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.IOException;
import java.io.InputStream;

import java.util.jar.JarInputStream;

public class Main {
    /**
     * Check if this inputstream is a jar/zip
     * @param is
     * @return true if inputstream is a jar
     */
    public static boolean isJar(InputStream is) {
        try {
            JarInputStream jis = new JarInputStream(is);
            if (jis.getNextEntry() != null) {
                return true;
            }
        } catch (IOException ioe) {
        }
        return false;
    }
}

Related

1. isJar(File file)
2. isJar(File file)
3. isJar(File file)
4. isJar(final File element)
5. isJar(String file)
6. isJarFile(File f)
7. isJarFile(File file)
8. isJarFile(File jar)