How to Retrieve All Table Names from a Database Using JDBC?

What is the method to retrieve all table names from a database schema using JDBC, and how can I filter them based on a specific prefix?

Connection jdbcConnection = DriverManager.getConnection(url, user, password);
DatabaseMetaData m = jdbcConnection.getMetaData();
ResultSet tables = m.getTables(jdbcConnection.getCatalog(), null, "TAB_%", null);
while (tables.next()) {
    String tableName = tables.getString("TABLE_NAME");
    System.out.println("Table: " + tableName);
}

To retrieve all table names from a database in Java using JDBC, you can utilize the `DatabaseMetaData` interface's `getTables()` method. This allows you to list all tables and filter them by a specific prefix if needed.

Connection jdbcConnection = DriverManager.getConnection(url, user, password);
DatabaseMetaData meta = jdbcConnection.getMetaData();
String[] types = {

Causes

• Incorrect connection parameters in DriverManager.getConnection() method.
• Not handling ResultSet correctly, leading to no output.
• Using wrong column index while accessing the table name from the ResultSet.

Solutions

• Ensure that your database URL, user, and password are correct in the connection string.
• Use a while loop to iterate through the ResultSet instead of a for loop, as the latter does not properly read entries sequentially.
• Access the correct column name for table names from the ResultSet using getString("TABLE_NAME") rather than the getMetaData().getTableName(i) method.

Mistake: Using a for loop to iterate over the ResultSet with an index, which is not suitable for ResultSets.

Solution: Use a while loop to iterate through the ResultSet as `tables.next()`.

Mistake: Passing incorrect parameters in `getTables()` method, which may result in null output.

Solution: Check the catalog name and other parameters to ensure they match your database schema.

Mistake: Not closing the database connection, leading to potential memory leaks.

Solution: Always use try-with-resources or ensures that you close the connection and ResultSet in a finally block.