JSCH with OpenSSH keys

Setup.txt

#generate a new SSH key in OpenSSH format
ssh-keygen -f /tmp/ossh.priv -t rsa -b 4096

cat /tmp/ossh.priv
-----BEGIN OPENSSH PRIVATE KEY-----
...

 cat /tmp/ossh.priv.pub
ssh-rsa XXXXXXXXXXXXXXX



#use putty conversion tools to convert private key to ssh.com format  BEGIN SSH2 ENCRYPTED PRIVATE KEY

ssh-keygen -e -f /tmp/ossh.priv > /tmp/ssh.pub

cat /tmp/ssh.pub
---- BEGIN SSH2 PUBLIC KEY ----
...




#these are the public and private key formats that JSCH supports
ssh-keygen -i -f /tmp/ssh.pub > /tmp/ssh_pub
cat /tmp/ssh.pub 
ssh-rsa XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

#if one needs to convert from  BEGIN SSH2 ENCRYPTED PRIVATE KEY to BEGIN OPENSSH PRIVATE KEY then puttygen and it's conversion options will be needed because ssh-keygen doesn't support it.
chmod 600 /tmp/ossh.priv 
ssh-keygen -p -f /tmp/ossh.priv -m pem -P XXXXX -N XXXXX
cat /tmp/ossh.priv
-----BEGIN RSA PRIVATE KEY-----

SFTPList.java

 String result = "";
String user = "XXXX";
String host = "XXXX.XXX";
int port = 22;
String directory = "/";
String sshPrivateKeyPath ="id-rsa.priv";
String sshPrivateKeyPassword ="XXXXX";
String sshPublicKeyPath ="id-rsa.pub";
int timeout = 10000;


try {
JSch.setLogger(new JSCHLogger());
JSch jsch = new JSch();

URL privateKey = AssemblyUtils.locateResource(context.getBaseURL(), sshPrivateKeyPath);
byte[] privateKeyBytes = Files.readAllBytes(Paths.get(privateKey.toURI()));

URL publicKey = AssemblyUtils.locateResource(context.getBaseURL(), sshPublicKeyPath);
byte[] publicKeyBytes = Files.readAllBytes(Paths.get(publicKey.toURI()));

jsch.addIdentity(user, privateKeyBytes, publicKeyBytes, sshPrivateKeyPassword.getBytes());

Session session = jsch.getSession(user, host, port);
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
session.setTimeout(timeout);
try {
session.connect(timeout);

Channel channel = session.openChannel("sftp");
channel.connect(timeout);
ChannelSftp c = (ChannelSftp) channel;

result = ((Vector<LsEntry>) c.ls(directory)).stream().map(e -> e.getFilename() + " Size: " + e.getAttrs().getSize() + " Modified: " + e.getAttrs().getMtimeString()).collect(Collectors.joining("\n"));
channel.disconnect();
System.out.format("SFTP List: %d - %s\n", directory, result);
} finally {
  session.disconnect();
}

} catch (Throwable t) {
t.printStackTrace();
}

I couldn't follow this. there's mismatch between java and text file, and the instructions on text file are not clear and I couldn't solve my problem following them. Can you elaborate which private/public keys could be used by JSch?