JDBC Query Execution In Java Example

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import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JavaJDBCQueryExecution {
	
	public static void main(String a[]){
        
        Connection connection = null;
        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            connection = DriverManager.
                    getConnection("jdbc:oracle:thin:@<hostname>:<port num>:<DB name>"
                        ,"user","password");
            Statement statement = connection.createStatement();
            //The query can be update query or can be select query
            String query = " SELECT * FROM Employee ";
            boolean status = statement.execute(query);
            if(status){
                //query is a select query.
                ResultSet rs = statement.getResultSet();
                while(rs.next()){
                    System.out.println(rs.getString(1));
                }
                rs.close();
            } else {
                int count = statement.getUpdateCount();
                System.out.println("Total records updated: "+count);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally{
            try{
                if(connection != null) connection.close();
            } catch (Exception ex){}
        }
    }
}
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