expand examples into README

Author: yue9944882

README.md

@@ -99,6 +99,67 @@ We prepared a few examples for common use-cases which are shown below:
   - [PagerExample](https://github.com/kubernetes-client/java/blob/master/examples/src/main/java/io/kubernetes/client/examples/PagerExample.java): 
   Support Pagination (only for the list request) to ease server-side loads/network congestion.
 
+
+__list all pods__:
+
+```
+import io.kubernetes.client.ApiClient;
+import io.kubernetes.client.ApiException;
+import io.kubernetes.client.Configuration;
+import io.kubernetes.client.apis.CoreV1Api;
+import io.kubernetes.client.models.V1Pod;
+import io.kubernetes.client.models.V1PodList;
+import io.kubernetes.client.util.Config;
+
+import java.io.IOException;
+
+public class Example {
+    public static void main(String[] args) throws IOException, ApiException{
+        ApiClient client = Config.defaultClient();
+        Configuration.setDefaultApiClient(client);
+
+        CoreV1Api api = new CoreV1Api();
+        V1PodList list = api.listPodForAllNamespaces(null, null, null, null, null, null, null, null, null);
+        for (V1Pod item : list.getItems()) {
+            System.out.println(item.getMetadata().getName());
+        }
+    }
+}
+```
+
+__watch on namespace object__:
+
+```
+import com.google.gson.reflect.TypeToken;
+import io.kubernetes.client.ApiClient;
+import io.kubernetes.client.ApiException;
+import io.kubernetes.client.Configuration;
+import io.kubernetes.client.apis.CoreV1Api;
+import io.kubernetes.client.models.V1Namespace;
+import io.kubernetes.client.util.Config;
+import io.kubernetes.client.util.Watch;
+
+import java.io.IOException;
+
+public class WatchExample {
+    public static void main(String[] args) throws IOException, ApiException{
+        ApiClient client = Config.defaultClient();
+        Configuration.setDefaultApiClient(client);
+
+        CoreV1Api api = new CoreV1Api();
+
+        Watch<V1Namespace> watch = Watch.createWatch(
+                client,
+                api.listNamespaceCall(null, null, null, null, null, 5, null, null, Boolean.TRUE, null, null),
+                new TypeToken<Watch.Response<V1Namespace>>(){}.getType());
+
+        for (Watch.Response<V1Namespace> item : watch) {
+            System.out.printf("%s : %s%n", item.type, item.object.getMetadata().getName());
+        }
+    }
+}
+```
+
 More examples can be found in [examples](examples/) folder. To run examples, run this command:
 
 ```shell