Java Utililty Methods FileInputStream Copy

if (srcFile.equals(destFile)) {
    return;
copyStream(new FileInputStream(srcFile), new FileOutputStream(destFile));

if (destFile.exists() && destFile.isDirectory()) {
    throw new IOException("Destination '" + destFile + "' exists but is a directory");
FileInputStream input = new FileInputStream(srcFile);
try {
    FileOutputStream output = new FileOutputStream(destFile);
    try {
        copy(input, output);
...

if (recursive) {
    if (!destFile.isDirectory()) {
        throw new IOException("Destination must be a directory.");
    copyFileR(srcFile, destFile);
} else {
    copyFile(srcFile, destFile);

FileInputStream src = new FileInputStream(srcFile);
try {
    copyFile(src, dstFile);
} finally {
    src.close();

byte[] buf = new byte[1024];
OutputStream ostream = new FileOutputStream(dstFile);
InputStream istream = new FileInputStream(srcFile);
try {
    int numBytes = 0;
    while ((numBytes = istream.read(buf)) >= 0) {
        ostream.write(buf, 0, numBytes);
} finally {
    ostream.close();

InputStream in = null;
OutputStream out = null;
try {
    in = new FileInputStream(srcFile);
    out = new FileOutputStream(dstFile);
    byte[] buf = new byte[1024];
    int len;
    while ((len = in.read(buf)) > 0) {
...

dstFile.getParentFile().mkdirs();
FileInputStream input = null;
FileOutputStream output = null;
try {
    input = new FileInputStream(srcFile);
    output = new FileOutputStream(dstFile);
    int bufferSize = 1024;
    byte[] buffer = new byte[bufferSize];
...

InputStream in = new FileInputStream(srcPath);
OutputStream out = new FileOutputStream(dstPath);
copy(in, out);
in.close();
out.close();

InputStream in = new FileInputStream(srFile);
File desDir = dtFile.getParentFile();
if (!desDir.exists()) {
    boolean ret = desDir.mkdirs();
    if (!ret)
        throw new IOException("Cannot create directory " + desDir.getName());
OutputStream out = new FileOutputStream(dtFile);
...

FileInputStream in = null;
try {
    in = new FileInputStream(source);
    copyToFile(target, in);
    in.close();
} catch (IOException e) {
    if (null != in) {
        closeQuietly(in);
...