Question

我正在尝试添加多个停靠点（停止包含变量（“站点停止”和“int numberLiters”）到具有此循环的路径及其各自的数字os升。

   $servername = "localhost";
$username = "root";
$password = "";
$dbname = "mtocrowdrise";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} 
echo "connected succesfully";

这个循环是ax次数，但它只填充了arrayList一次，我做了This page contains the following errors: error on line 1 at column 1: Document is empty Below is a rendering of the page up to the first error.和一个for循环来打印数组中的数据，无论我运行这个脚本多少次它只添加我输入的最后一个。这是我的班级路线：

private int askStation( ) {
        Station po=null;
        int id;

        consola.println("Id Station?");
        id = consola.readInt();
        po=station.getStation(id);

        if( (po==null)){
            consola.println("Unknown Station" );
            consola.readLine();
            return 0;
        }
        consola.print( "How many litters ");
        int nLiters = consola.readInt();
        if (po.checksLiters(nLiters)==false)
            consola.println("Invalid Quantity");
        else {
            //ADD STOP TO THE ROUTE
            Stop s=new Stop(po,nLiters);

            Route r=new Route(1);
            r.addStop(s);
            consola.println(r.toString());

        }
        consola.readLine();
        consola.clear();
    }

我做错了什么？是添加方法吗？或者在askStation方法循环中初始化对象？

Answer 1

$( "#my-form" ).submit(function( event ) {
            alert( "Handler for .submit() called." );
            //event.preventDefault();
            return false;
                });

您每次都在创建一条新路线，然后在新路线上添加一个停靠点，这样您就会丢失旧路线。为避免这种情况，请在方法之外设置路径，而不是执行

UPDATE t1
SET t1.[age level] = t2.level
FROM table1 t1
JOIN table2 t2 ON t1.[age level] BETWEEN t2.min_age and t2.max_age

另外，

 Stop s=new Stop(po,nLiters);

        Route r=new Route(1);
        r.addStop(s);

应该是

Route r = new Route();

JAVA不能向arrayList添加多个对象

1 个答案: