Structure

java-ssh-tunnel
└── src
    └── main
        ├── java
        │   └── dev
        │       └── darshit
        │           └── java_ssh_tunnel
        │               ├── Main.java
        │               ├── MultiTunneler.java
        │               ├── Tunneler.java
        │               └── ssh
        │                   ├── TunnelDetails.java
        │                   └── UserDetails.java
        └── resources

Usage

Download the project
Load up in your IDE
Run mvn clean install
Change Main.java with required details like SSH username, SSH password, JumpHost sshHost
(Optional) Maybe load up localPort, remoteHost, and remotePort details from a file
Run Main.java

If all things go well, you'll see following output on your stdout

Starting tunneling...
<remoteHost>:<remotePort> is available on localhost:<localPort>
Press Enter to terminate the tunnels...

Caveats

While the above is very convenient, DO NOT USE IT TO CONNECT TO PROD

Read my blog post on the same: https://darshit.dev/posts/java-ssh-tunnel/