如何在Java编程中使用HBase创建名为'dept'和'emp'的表，并为它们各自定义数据列'related_data'?请提供相应的Java代码示例以展示这个过程。

在Java中，你可以使用Apache HBase的`HBaseAdmin`类来创建表和定义列族。以下是一个简单的步骤说明以及对应的Java代码示例：

首先，确保你已经添加了HBase的依赖到你的项目中。如果你使用的是Maven，可以在pom.xml文件中添加以下依赖：

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-client</artifactId>
    <version>YOUR_HBASE_VERSION</version>
</dependency>

然后，你需要创建一个`HBaseAdmin`实例并连接到HBase集群：

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Admin;

public class HBaseTableCreation {
    private static final String ZOOKEEPER_QUORUM = "your_zookeeper_quorum";
    private static final int ZOOKEEPER_PORT = your_zookeeper_port;
    private static final String REGION_SERVERS = "your_region_servers";

    public static void main(String[] args) throws Exception {
        Configuration conf = HBaseConfiguration.create();
        // 设置Zookeeper地址、端口和Region服务器列表
        conf.set("zookeeper.quorum", ZOOKEEPER_QUORUM);
        conf.set("zookeeper.znode.parent", "/hbase");
        conf.set("hbase.zookeeper.property.dataDir", "/path/to/zookeeper/data");

        Admin admin = new Admin(conf);
        try {
            // 创建表
            createDepartmentTable(admin);
            createEmployeeTable(admin);
        } finally {
            admin.close(); // 关闭Admin连接
        }
    }

    private static void createDepartmentTable(Admin admin) throws Exception {
        if (!admin.tableExists("dept")) {
            admin.createTable(new TableDescriptorBuilder()
                    .setTableName("dept")
                    .addFamily(new ColumnFamilyDescriptorBuilder().setColumnFamilyName("related_data").build())
                    .build());
            System.out.println("Department table created successfully.");
        } else {
            System.out.println("Department table already exists.");
        }
    }

    private static void createEmployeeTable(Admin admin) throws Exception {
        if (!admin.tableExists("emp")) {
            admin.createTable(new TableDescriptorBuilder()
                    .setTableName("emp")
                    .addFamily(new ColumnFamilyDescriptorBuilder().setColumnFamilyName("related_data").build())
                    .build());
            System.out.println("Employee table created successfully.");
        } else {
            System.out.println("Employee table already exists.");
        }
    }
}

在这个例子中，我们创建了两个表，"dept"和"emp"，都包含一个列族"related_data"。替换`your_zookeeper_quorum`、`your_zookeeper_port`和`your_region_servers`为你实际的ZooKeeper配置。