Java Utililty Methods Zip File

try {
    FileInputStream in = new FileInputStream(inPath);
    try {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outPath));
        out.putNextEntry(new ZipEntry(nameInsideZip));
        byte[] buffer = new byte[BLOCK_SIZE];
        int len;
        while ((len = in.read(buffer)) > 0) {
...