Java Utililty Methods Unzip to Folder

BufferedOutputStream dest = null;
FileInputStream fis = new FileInputStream(sourceFile);
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
ZipEntry entry = null;
int BUFFER_SIZE = 4096;
while ((entry = zis.getNextEntry()) != null) {
    String dst = destDir + File.separator + entry.getName();
    if (entry.isDirectory()) {
...

final FileInputStream fis = new FileInputStream(sourceFile);
final ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
final File destDirFile = new File(destDir);
final byte[] data = new byte[BUFFER_SIZE];
ZipEntry entry;
Set<String> visitedDirs = new HashSet<>();
createDir(destDir);
while ((entry = zis.getNextEntry()) != null) {
...

ZipFile zipFile = new ZipFile(sourceFile);
Enumeration<? extends ZipEntry> entries = zipFile.entries();
while (entries.hasMoreElements()) {
    ZipEntry entry = entries.nextElement();
    File entryDestination = new File(toDir, entry.getName());
    entryDestination.getParentFile().mkdirs();
    if (entry.isDirectory())
        entryDestination.mkdirs();
...

ZipFile zf = null;
try {
    zf = new ZipFile(sourceFileName);
    Enumeration en = zf.entries();
    while (en.hasMoreElements()) {
        ZipEntry zipEnt = (ZipEntry) en.nextElement();
        saveEntry(destPath, zipEnt, zf);
} finally {
    if (zf != null)
        zf.close();

FileInputStream fis = null;
BufferedInputStream bis = null;
ZipInputStream zis = null;
try {
    fis = new FileInputStream(new File(sourceZip));
    bis = new BufferedInputStream(fis);
    zis = new ZipInputStream(bis);
    for (ZipEntry ze = zis.getNextEntry(); ze != null; ze = zis.getNextEntry()) {
...

src = src.replace("~", System.getProperty("user.home"));
dest = dest.replace("~", System.getProperty("user.home"));
if (!new File(src).exists()) {
    throw new RuntimeException(src + " does not exist.");
ZipInputStream zis = new ZipInputStream(new CheckedInputStream(new FileInputStream(src), new CRC32()));
innerUnzip(zis, dest, stream);
zis.close();
...

byte[] buf = new byte[1024];
try {
    ZipInputStream zin = new ZipInputStream(new FileInputStream(sZip));
    ZipEntry ze;
    while ((ze = zin.getNextEntry()) != null) {
        FileOutputStream out = new FileOutputStream(ze.getName());
        int len;
        while ((len = zin.read(buf)) > 0) {
...

File file = new File(toUnpackName);
return unzip(file);

return unzip(new File(zip), new File(dest));

if (zip == null || zip.length() == 0 || folder == null || folder.length() == 0) {
    return;
try (ZipFile zipFile = new ZipFile(zip)) {
    Enumeration<? extends ZipEntry> entries = zipFile.entries();
    while (entries.hasMoreElements()) {
        ZipEntry entry = entries.nextElement();
        String currentEntry = entry.getName();
...