feat: add samples

samples/src/main/java/com/example/bigquery/CreateTable.java

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+package com.example.bigquery;
+
+// [START bigquery_create_table]
+import com.google.cloud.bigquery.BigQuery;
+import com.google.cloud.bigquery.BigQueryException;
+import com.google.cloud.bigquery.BigQueryOptions;
+import com.google.cloud.bigquery.Field;
+import com.google.cloud.bigquery.LegacySQLTypeName;
+import com.google.cloud.bigquery.Schema;
+import com.google.cloud.bigquery.StandardTableDefinition;
+import com.google.cloud.bigquery.TableDefinition;
+import com.google.cloud.bigquery.TableId;
+import com.google.cloud.bigquery.TableInfo;
+
+public class CreateTable {
+
+  public static void runCreateTable() {
+    // TODO(developer): Replace these variables before running the sample.
+    String datasetName = "my-dataset-name";
+    String tableName = "my_table_name";
+    Schema schema =
+        Schema.of(
+            // LegacySQLTypeName will be updated to StandardSQLTypeName once release rolls out
+            Field.of("stringField", LegacySQLTypeName.STRING),
+            Field.of("booleanField", LegacySQLTypeName.BOOLEAN));
+    createTable(datasetName, tableName, schema);
+  }
+
+  public static void createTable(String datasetName, String tableName, Schema schema) {
+    // Initialize client that will be used to send requests. This client only needs to be created
+    // once, and can be reused for multiple requests.
+    BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
+
+    TableId tableId = TableId.of(datasetName, tableName);
+    TableDefinition tableDefinition = StandardTableDefinition.of(schema);
+    TableInfo tableInfo = TableInfo.newBuilder(tableId, tableDefinition).build();
+
+    try {
+      bigquery.create(tableInfo);
+      System.out.println("Table created successfully");
+    } catch (BigQueryException e) {
+      System.out.println("Table was not created. \n" + e.toString());
+    }
+  }
+}
+// [END bigquery_create_table]

samples/src/main/java/com/example/bigquery/ExtractTableToJSON.java

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+package com.example.bigquery;
+
+// [START bigquery_extract_table]
+import com.google.cloud.bigquery.BigQueryException;
+import com.google.cloud.bigquery.Table;
+
+public class ExtractTableToJSON {
+
+  public static void runExtractTableToJSON() {
+    // TODO(developer): Replace these variables before running the sample.
+    Table table = null;
+    String format = "CSV";
+    String bucketName = "my-bucket";
+    String gcsFileName = "gs://" + bucketName + "/extractTest.csv";
+    extractTableToJSON(table, format, gcsFileName);
+  }
+
+  // Exports my-dataset-name:my_table to gcs://my-bucket/my-file as raw CSV
+  public static void extractTableToJSON(Table table, String format, String gcsFileName) {
+
+    try {
+      table.extract(format, gcsFileName);
+      System.out.println("Table extraction job completed successfully");
+    } catch (BigQueryException e) {
+      System.out.println("Table extraction job was interrupted. \n" + e.toString());
+    }
+  }
+}
+// [END bigquery_extract_table]

samples/src/test/java/com/example/bigquery/CreateTableIT.java

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+package com.example.bigquery;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.cloud.bigquery.Field;
+import com.google.cloud.bigquery.LegacySQLTypeName;
+import com.google.cloud.bigquery.Schema;
+import com.google.cloud.bigquery.testing.RemoteBigQueryHelper;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class CreateTableIT {
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  @Before
+  public void setUp() {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.setOut(null);
+  }
+
+  @Test
+  public void testCreateTable() {
+    String generatedDatasetName = RemoteBigQueryHelper.generateDatasetName();
+
+    // Create a new dataset to create a table in
+    CreateDataset.createDataset(generatedDatasetName);
+
+    // Create an empty table with specific schema in the dataset just created
+    String tableName = "my_table_name";
+    Schema schema =
+        Schema.of(
+            Field.of("stringField", LegacySQLTypeName.STRING),
+            Field.of("booleanField", LegacySQLTypeName.BOOLEAN));
+    CreateTable.createTable(generatedDatasetName, tableName, schema);
+
+    assertThat(bout.toString()).contains("Table created successfully");
+  }
+}

samples/src/test/java/com/example/bigquery/ExtractTableToJSONIT.java

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+package com.example.bigquery;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.cloud.bigquery.BigQuery;
+import com.google.cloud.bigquery.BigQueryException;
+import com.google.cloud.bigquery.BigQueryOptions;
+import com.google.cloud.bigquery.Field;
+import com.google.cloud.bigquery.LegacySQLTypeName;
+import com.google.cloud.bigquery.Schema;
+import com.google.cloud.bigquery.StandardTableDefinition;
+import com.google.cloud.bigquery.Table;
+import com.google.cloud.bigquery.TableDefinition;
+import com.google.cloud.bigquery.TableId;
+import com.google.cloud.bigquery.TableInfo;
+import com.google.cloud.bigquery.testing.RemoteBigQueryHelper;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ExtractTableToJSONIT {
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  @Before
+  public void setUp() throws Exception {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.setOut(null);
+  }
+
+  @Test
+  public void testExtractTableToJSON() {
+    String generatedDatasetName = RemoteBigQueryHelper.generateDatasetName();
+
+    // Create a new dataset to create a new table in
+    CreateDataset.createDataset(generatedDatasetName);
+
+    // Create a new table to extract to GCS for
+    String tableName = "my_table_name";
+    Schema schema =
+        Schema.of(
+            Field.of("stringField", LegacySQLTypeName.STRING),
+            Field.of("booleanField", LegacySQLTypeName.BOOLEAN));
+    Table table = createTableHelper(generatedDatasetName, tableName, schema);
+
+    // Extract table content to GCS in CSV format
+    ExtractTableToJSON.extractTableToJSON(table, "CSV", "gs://my-bucket/extractTest.csv");
+    assertThat(bout.toString()).contains("Table extraction job completed successfully");
+  }
+
+  private static Table createTableHelper(String datasetName, String tableName, Schema schema) {
+    // Initialize client that will be used to send requests. This client only needs to be created
+    // once, and can be reused for multiple requests.
+    BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
+
+    TableId tableId = TableId.of(datasetName, tableName);
+    TableDefinition tableDefinition = StandardTableDefinition.of(schema);
+    TableInfo tableInfo = TableInfo.newBuilder(tableId, tableDefinition).build();
+
+    try {
+      Table table = bigquery.create(tableInfo);
+      return table;
+    } catch (BigQueryException e) {
+      System.out.println("Table was not created. \n" + e.toString());
+      return null;
+    }
+  }
+}