delete rows with jdbc

package dbtest;

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

import dbtest.DbUtil;

public class SimpleDelete {

	public static void main(String[] args) throws Exception {
		
		Connection conn=DbUtil.getConnection();
		conn.setAutoCommit(true);
		Statement st=null;
		try
		{
			st=conn.createStatement();
			
			int n=st.executeUpdate("delete from aed_db.GoalDetail where SourceSystemId='ZA'");

			System.out.println(n+ " rows has been deleted");
		}
		catch (Exception e) {
			e.printStackTrace(System.out);
		}
		finally {
			if(st!=null) st.close();
		}
		System.out.println("Done deletion");
	}

}