org.apache.derby.jdbc.ClientDataSource ds =
   new org.apache.derby.jdbc.ClientDataSource();
ds.setDatabaseName("mydb");
ds.setCreateDatabase("create");  
ds.setUser("user");  
ds.setPassword("mypass"); 

// The host on which Network Server is running
ds.setServerName("localhost");

// The port on which Network Server is listening
ds.setPortNumber(1527);

Connection conn = ds.getConnection(); 

org.apache.derby.jdbc.ClientConnectionPoolDataSource cpds = 
   new ClientConnectionPoolDataSource();

// Set the number of statements the cache is allowed to cache.
// Any number greater than zero will enable the cache.
cpds.setMaxStatements(20);

// Set other DataSource properties
cpds.setDatabaseName("mydb");
cpds.setCreateDatabase("create");
cpds.setUser("user");
cpds.setPassword("mypass"); 
cpds.setServerName("localhost");
cpds.setPortNumber(1527);

// This physical connection will have JDBC statement caching enabled.
javax.sql.PooledConnection pc = cpds.getPooledConnection();

// Create a logical connection.
java.sql.Connection con = pc.getConnection();

// Interact with the database.
java.sql.PreparedStatement ps = con.prepareStatement(
   "select * from myTable where id = ?");
...
ps.close(); // Inserts or returns statement to the cache
...
con.close();

// The next logical connection can gain from using the cache.
con = pc.getConnection();

// This prepare causes a statement to be fetched from the local cache.
PreparedStatement ps = con.prepareStatement(
   "select * from myTable where id = ?");
...

// To dispose of the cache, close the connection.
pc.close();