java - java中的循环处理

Question

嘿，我在打印时遇到了java问题...我有一个程序，我需要在循环中打印一些值。在循环的每次重复中，现在都会形成一个新值，我希望当循环结束时第一次重复的第一个值应该打印，然后打印第二个，然后依此类推......但在我的情况下，它只打印最后一次执行的值

这里我上传了我的输出图片，你可以清楚地看到只打印了最后一个循环的值但我希望在第一行中应该有第一个循环的值，在第二行中应该有第二个循环的值，在第三行中应该有第三个循环的值。

这是我的代码

public class ManufactureClass {

        private static void outputtable() {


                    System.out.println(
                            "\n--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                    System.out.println("| No. of Order | No. of Units | Time Consumed by WA | Time Consumed by WB | Time Consumed by WH | Effective Units | Defective Units | Total Time Consumed By this Order | No. of Packages |");
                    System.out.println(
                            "--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                    for(int i=1;i<=total_orders;i++) {
                    long sum=Long.sum((time_consumed_by_Work_Station_H_in_thread_sleep_for_units_greater_than_30/1000), (time_consumed_by_Work_Station_B_in_thread_sleep/1000));
                    long sum1=Long.sum((time_consumed_by_Work_Station_A_in_integer/1000), sum);
                    total_time_consumed_by_order=Long.toString(sum1)+" seconds";
                    if(units_in_an_order<=30) {
                        System.out.println("|       "+loop_for_orders+"       |      "+number_of_units_in_order+"      | "+actual_time_by_Work_Station_A_in_seconds+" | "+actual_time_by_Work_Station_B_in_seconds+" | "+actual_time_by_Work_Station_H_in_seconds_for_units_less_than_30+" | "+effective_units+" | "+defective_units+" | "+total_time_consumed_by_order+" | "+number_of_packages_for_units_less_than_30+" | ");
                        System.out.println(
                                "--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                        }else {

                        System.out.println("|      "+loop_for_orders+"       |      "+number_of_units_in_order+"      | "+actual_time_by_Work_Station_A_in_seconds+" | "+actual_time_by_Work_Station_B_in_seconds+" | "+actual_time_by_Work_Station_H_in_seconds_for_units_greater_than_30+" | "+effective_units+" | "+defective_units+" | "+total_time_consumed_by_order+" | "+number_of_packages_for_units_greater_than_30+" | ");
                        System.out.println(
                                "--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                        }
            }
        }
        public static void main(String[] args) throws InterruptedException {

            display_header();
            display_msg();

            for(loop_for_orders=1;loop_for_orders<=total_orders;loop_for_orders++) {
                Random rand = new Random(); 
                units_in_an_order = rand.nextInt(200);
                number_of_units_in_order=Integer.toString(units_in_an_order);
                int a=10;
                int b=100;
                defective_units =(float) (0.01*units_in_an_order);
                effective_units=units_in_an_order-defective_units;
            int zero1=0;
            int zero2=0;
            time_consumed_by_Work_Station_A = "" + units_in_an_order + zero1+zero2;
            time_consumed_by_Work_Station_A_in_integer = Long.parseLong(time_consumed_by_Work_Station_A);
            interval = units_in_an_order;
        Manufactured_units_by_work_station_A();
        permission();




        }
}


    outputtable();
}

Answer 1

好吧，在第二次看到时，正如上面评论中提到的，您在每次迭代中都写下了您的值。您可能需要 ArrayList 或集合来存储每次迭代中收到的值。

做这样的事情。

    public class ManufactureClass {

      static ArrayList myArrayList = new ArrayList();

     function  public static void main(String[] args) throws InterruptedException {

      //(...)

        for(loop_for_orders=1;loop_for_orders<=total_orders;loop_for_orders++) {
              myArrayList.add(yourOutputString);
         }
    }

在你的 Output-Funktion 中，你只需要遍历 ArrayList，甚至可以在静态上下文中设置这个函数 - 但这样的结构绝对是正确的方法。

编辑:如果您想生成行输出，那就有点复杂了，但请记住 - key 是正确的 DataStructure 和处理它的适当方法，这对您有用。 :)

编辑2:所以如果我们在同一个类的第二个函数中遍历数组List，它看起来像这样:

    public void printMyOutputLine(){
            for(j=0;j<this.myArrayList.size();j++)
            {
               System.out.println(this.myArrayList[j]);
             }

     }

这真的很基本 - 唯一的问题是通过使用适当的 DataStructure 来获取列表中所有数据的“技巧” - 在本例中我猜是 ArrayList，但可能你更愿意使用集合或 StringArray。你会明白的 - 描述的方法将引导你走向正确的方向。