Java 数据库查询未在控制台中打印出来

Question

我正在创建我的第一个 Java 程序，该程序从 MySql 数据库中提取数据。我无法从查询中获取结果以在控制台中打印。我的程序编译没有错误，但 out.print 命令未在控制台中显示内容。我使用的是 Intellij IDEA 15.0.2。

import java.sql.*;
import static java.lang.System.*;

public class Main {
public static void main(String[] args) {
String url = "jdbc:mysql://localhost:3306/animal";
    String user = "username";
    String pwd = "password";
    try {
        Connection connection =
             DriverManager.getConnection(url, user, pwd); // Get Connection
     Statement statement = connection.createStatement(); // Create Statement
        String query = "SELECT * FROM animal";
      ResultSet resultSet = statement.executeQuery(query); // Execute Query
        while (resultSet.next()) { // Process Results
            out.print(resultSet.getInt("animal_id"));

        }
    } catch (SQLException se) { }
}
}

Answer 1

打印到控制台正确的命令是

System.out.print("Whatever you want to print");

不是

out.print("Whatever you want to print");