数组转换

Question

我远离完全理解阵列，我真的在努力解决这个问题。这是问题所在：我需要操作一组int。我的程序采用逗号分隔的两个值;第一个值是数组的大小，第二个值是转换的类型。定义一个表示数组大小的常量MAXSIZE，并初始化为包含0到MAXSIZE之间的值。根据输入，程序应打印出每个转换：减半，双，绝对和累积。我认为我的代码甚至没有达到案例方法。我的代码的最后几行不希望因某种原因而被格式化，我用return arrayList完成;

public class Game {

     public static void main(String[] args) {

     Scanner input =  new Scanner(System.in);
     input.useDelimiter("[,\n]");
     System.out.println("Enter size of array and case, separated by comma: ");

     final int MAXSIZE = input.nextInt();
     String transformation = input.next();
     int arrayList[] = new int[MAXSIZE +1];
     for (int i = 0; i < arrayList.length; i++) {
            arrayList[i] = i;
        }

     for(int i = 1; i<arrayList.length; i++) {
            System.out.print(arrayList[i] + "\n");
     }
     System.out.print(transformation);

     cases(transformation, arrayList);

     }

     public static void caseDouble(String transformation, int[] arrayList) {
            for(int i = 1; i<arrayList.length; i++) {
                arrayList[i] = arrayList[i]*2;
            }   
            for(int i = 1; i<arrayList.length; i++) {
                System.out.print(arrayList[i] + "\n");
         }

     }
     public static void caseAccumulate(String transformation, int[] arrayList) {
            int total = 0;
            for (int i = 1; i<arrayList.length; i++) {
                total += arrayList[i]/arrayList.length;
                System.out.println(arrayList[total]);   
            }
        }
     public static void caseAbsolute(String transformation, int[] arrayList) {
         for(int i = 1; i<arrayList.length;i++) {
             System.out.print(Math.abs(arrayList[i]));
         }
     }
     public static void caseHalve(String transformation, int[] arrayList) {
         for(int i = 1; i<arrayList.length;i++) {
             System.out.print(arrayList[i]/2);
         }
     }

     public static int[] cases(String transformation, int[] arrayList) {
         switch(transformation) {
         case "absolute":
             caseAbsolute(transformation, arrayList);
                 break;
         case "halve":
             caseHalve(transformation, arrayList);
                 break;
         case "accumulate":
             caseAccumulate(transformation, arrayList);
                break;
         case "double":
             caseDouble(transformation, arrayList);

Answer 1

在输入时，应避免在逗号和转换名称之间添加空格。

E.g。 类型 10,absolute 代替 10, absolute。