Extract the zip file in the BlackBerry Java app

I'm trying to write code to unzip the zip archive and put the output in another folder

Do I have to use a third-party library? Does anyone have some code for me to start?

ZipEntry dataZE;
    InputStream isData = getClass().getResourceAsStream("/" + dataname + ".zip");
    StringBuffer sbData = new StringBuffer();
    ZipInputStream dataZIS = new ZipInputStream(isData);
    FileConnection file =
        (FileConnection)Connector.open(
            "file:///SDCard/BlackBerry/documents/" + filename,Connector.READ_WRITE
        );
    if (!file.exists()) {                               
        file.mkdir();
    }                   

    while ((dataZE = dataZIS.getNextEntry()) != null) {
       out.write(dataZE );
       out.flash();
       dataZIS.closeEntry();
    }

Solution

Use zipme to extract the zip archive file in the Java ME / BlackBerry application

Take a look at the sample code:

ZipEntry dataZE;
InputStream isData = getClass().getResourceAsStream("/" + dataname + ".zip");
StringBuffer sbData = new StringBuffer();
ZipInputStream dataZIS = new ZipInputStream(isData);
while ((dataZE = dataZIS.getNextEntry()) != null) {
    // do something...
    dataZIS.closeEntry();
}