Properties overrides = new Properties();
overrides.setProperty(Constants.PROPERTY_ENDPOINT, CLOUD_SERVIE_ENDPOINT);

// get a context with nova that offers the portable ComputeService api
BlobStoreContext context = new BlobStoreContextFactory().createContext("aws-s3", ident,
    password, ImmutableSet.<Module> of(), overrides);

Properties overrides = new Properties();
overrides.setProperty("swift.endpoint", "http://1.1.1.1:8080/auth");

BlobStoreContext context = new BlobStoreContextFactory().createContext("swift", "XXXXXX:YYYYY", "password", ImmutableSet.<Module> of(), overrides);

import static org.jclouds.s3.reference.S3Constants.PROPERTY_S3_VIRTUAL_HOST_BUCKETS;
...

     Properties overrides = new Properties();
     overrides.setProperty(PROPERTY_S3_VIRTUAL_HOST_BUCKETS, "false");

     BlobStore blobstore = ContextBuilder.newBuilder(new S3ApiMetadata()) // or "s3"
                                         .endpoint("http://host:port")
                                         .credentials(accessKey, secretKey)
                                         .overrides(overrides)
                                         .buildView(BlobStoreContext.class).getBlobStore();

import static org.jclouds.s3.reference.S3Constants.PROPERTY_S3_SERVICE_PATH;
...

     overrides.setProperty(PROPERTY_S3_SERVICE_PATH, "/services/Walrus");
...
                                         .endpoint("http://host:port/services/Walrus")

String username = "test:tester";
    String password = "testing";
    Properties overrides = new Properties();
    overrides.setProperty(PROPERTY_S3_VIRTUAL_HOST_BUCKETS, "false");

    BlobStoreContext context = ContextBuilder.newBuilder(new S3ApiMetadata())
            .endpoint("http://myserver:8080")
            .credentials(username, password)
            .overrides(overrides)
            .buildView(BlobStoreContext.class);
    BlobStore blobStore = context.getBlobStore();
    String bucket="public";
    blobStore.containerExists(bucket);

    System.out.println("bucket exist "+ bucket);
}