Count rows in MySQL : MySQL « Database SQL JDBC « Java

Count rows in MySQL

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

public class CountRows_MySQL {

  public static Connection getConnection() throws Exception {
    String driver = "";
    String url = "jdbc:mysql://localhost/octopus";
    String username = "root";
    String password = "root";

    Class.forName(driver); // load MySQL driver
    Connection conn = DriverManager.getConnection(url, username, password);
    return conn;

  public static int countRows(Connection conn, String tableName) throws SQLException {
    // select the number of rows in the table
    Statement stmt = null;
    ResultSet rs = null;
    int rowCount = -1;
    try {
      stmt = conn.createStatement();
      rs = stmt.executeQuery("SELECT COUNT(*) FROM " + tableName);
      // get the number of rows from the result set;
      rowCount = rs.getInt(1);
    } finally {
    return rowCount;

  public static void main(String[] args) {
    Connection conn = null;
    try {
      conn = getConnection();
      String tableName = "myTable";
      System.out.println("tableName=" + tableName);
      System.out.println("conn=" + conn);
      System.out.println("rowCount=" + countRows(conn, tableName));
    } catch (Exception e) {
    } finally {
      // release database resources
      try {
      } catch (SQLException e) {

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