Question

please someone tell the code to launch an instance in digital ocean using java

Answer 1

In order to create a digital ocean droplet (instance) via java code, you might need to use DigitalOcean API Client in Java.

You will need this maven dependency:

<dependency>
    <groupId>com.myjeeva.digitalocean</groupId>
    <artifactId>digitalocean-api-client</artifactId>
    <version>2.17</version>
</dependency>

You need to first create a DigitalOcean Client:

DigitalOcean apiClient = new DigitalOceanClient(authToken);

Now you can invoke the method(s) to create the droplet as per need via apiClient:

// Fetching all the available droplets from control panel
Droplets droplets = apiClient.getAvailableDroplets(pageNo, perPage);

// Fetching all the available kernels for droplet
Kernels kernels = apiClient.getAvailableKernels(dropletId, pageNo, perPage);

// Create a new droplet
Droplet newDroplet = new Droplet();
newDroplet.setName("api-client-test-host");
newDroplet.setSize(new Size("512mb")); // setting size by slug value
newDroplet.setRegion(new Region("sgp1")); // setting region by slug value; sgp1 => Singapore 1 Data center
newDroplet.setImage(new Image(1601)); // setting by Image Id 1601 => centos-5-8-x64 also available in image slug value
newDroplet.setEnableBackup(Boolean.TRUE);
newDroplet.setEnableIpv6(Boolean.TRUE);
newDroplet.setEnablePrivateNetworking(Boolean.TRUE);

// Adding SSH key info
List<Key> keys = new ArrayList<Key>();
keys.add(new Key(6536653));
keys.add(new Key(6536654));
newDroplet.setKeys(keys);

For more info refer to https://github.com/jeevatkm/digitalocean-api-java