未將用戶輸入傳遞到數組

Question

我在將用戶輸入傳遞給數組時遇到問題。我應該採取用戶輸入，並根據類型，將其傳遞到一個定義的數組，然後將其傳遞給一個方法，該方法可以給出數組的總數。問題是總顯示爲「O」，這使我相信數據不在數組中。任何建議都會有幫助。

import java.util.Scanner; 
public class WestonPASS9 
{ 
    public static void main(String[] args) 
    { 
     Scanner keyboard = new Scanner(System.in); 
     String input1; 
     int size1; 
     int enterint; 
     double enterdouble; 
     float enterfloat; 
     long enterlong; 
     int[] arrayint = new int[0]; 
     double[] arraydouble = new double[0]; 
     float[] arrayfloat = new float[0]; 
     long[] arraylong = new long[0]; 



     System.out.println("What data type are you using? (Int, Double, Float, Long)"); 
     input1 = keyboard.next(); 
     System.out.println("How many numbers will you be entering?"); 
     size1 = keyboard.nextInt(); 

     if(input1.equals("Int")) 
     { 
     arrayint = new int[size1]; 
     for(int i=0;i<size1;i++){ 
      System.out.println("Enter Integer"); 
      enterint = keyboard.nextInt();} 
      getTotal(arrayint); 

     } 
     if(input1.equals("Double")) 
     { 
     arraydouble = new double[size1]; 
     for(int i=0;i<size1;i++){ 
      System.out.println("Enter Double"); 
      enterdouble = keyboard.nextDouble();} 

     } 
     if(input1.equals("Float")) 
     { 
     arrayfloat = new float[size1]; 
     for(int i=0;i<size1;i++){ 
      System.out.println("Enter Float"); 
      enterfloat = keyboard.nextFloat();} 

     } 
     if(input1.equals("Long")) 
     { 
     arraylong = new long[size1]; 
     for(int i=0;i<size1;i++){ 
      System.out.println("Enter Long"); 
      enterlong = keyboard.nextLong();} 

     } 
     } 
     public static int getTotal(int[] x) 
      { 
      int total = 0;  
      for (int index = 0; index < x.length; index++) 
      { 
      total += x [index];   
      }   
      System.out.println("Total: "+total); 
      return total; 
      } 



} 

Answer 1

我想通了，這裏是代碼，如果任何人需要的答案。

import java.util.Scanner; 
public class WestonPASS9 
{ 
    public static void main(String[] args) 
    { 
     Scanner keyboard = new Scanner(System.in); 
     String input1; 
     int size1; 
     int enterint; 
     double enterdouble; 
     float enterfloat; 
     long enterlong; 
     int[] arrayint; 
     double[] arraydouble; 
     float[] arrayfloat; 
     long[] arraylong; 



     System.out.println("What data type are you using? (Int, Double, Float, Long)"); 
     input1 = keyboard.next(); 
     System.out.println("How many numbers will you be entering?"); 
     size1 = keyboard.nextInt(); 

     if(input1.equals("Int")) 
     { 
     arrayint = new int[size1]; 
     for(int index =0; index < arrayint.length; index++) 
     { 
      System.out.println("Enter Integer " + (index + 1) + ": "); 
      arrayint[index] = keyboard.nextInt(); 
     } 
     for (int index = 0; index < size1; index++) 
      System.out.print(arrayint[index]+" "); 
      getTotal(arrayint); 
      getAverage(arrayint); 
      getHighest(arrayint); 
      getLowest(arrayint); 

     } 
     if(input1.equals("Double")) 
     { 
     arraydouble = new double[size1]; 
     for(int index =0; index < size1; index++) 
     { 
      System.out.println("Enter Double " + (index + 1) + ": "); 
      arraydouble[index] = keyboard.nextDouble(); 
     } 
      for (int index = 0; index < size1; index++) 
      System.out.print(arraydouble[index]+" "); 
      getTotal1(arraydouble); 
      getAverage1(arraydouble); 
      getHighest1(arraydouble); 
      getLowest1(arraydouble); 

     } 
     if(input1.equals("Float")) 
     { 
     arrayfloat = new float[size1]; 
     for(int index =0; index <size1; index++) 
     { 
      System.out.println("Enter Float " + (index + 1) + ": "); 
      arrayfloat[index] = keyboard.nextFloat(); 
     } 
     for (int index = 0; index < size1; index++) 
      System.out.print(arrayfloat[index]+" "); 
      getTotal2(arrayfloat); 
      getAverage2(arrayfloat); 
      getHighest2(arrayfloat); 
      getLowest2(arrayfloat); 


     } 
     if(input1.equals("Long")) 
     { 
     arraylong = new long[size1]; 
     for(int index =0;index <size1; index++) 
     { 
      System.out.println("Enter Long" + (index + 1) + ": "); 
      arraylong[index] = keyboard.nextLong(); 
     } 
      for (int index = 0; index < size1; index++) 
      System.out.print(arraylong[index]+" "); 
      getTotal3(arraylong); 
      getAverage3(arraylong); 
      getHighest3(arraylong); 
      getLowest3(arraylong); 


     } 
     } 
     public static int getTotal(int[] x) 
      { 
      int total = 0;  
      for (int index = 0; index < x.length; index++) 
      { 
      total += x [index];   
      }   
      System.out.println("Total: "+total); 
      return total; 
      } 
    public static double getAverage(int[] x) 
      { 
      int total = 0; 
      for (int index = 0; index < x.length; index++) 
      { 
       total += x [index];   
      }   
      double average = (total/2.0); 
      System.out.println("Average: "+average); 
      return average; 
      } 
     public static int getHighest (int[] x) 
      { 
      int highest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]>highest) 
      highest=x[index]; 
      } 
      System.out.println("Highest: "+highest); 
      return highest; 
      } 
     public static int getLowest (int[] x) 
      { 
      int lowest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]<lowest) 
      lowest=x[index]; 
      } 
      System.out.println("Lowest: "+lowest); 
      return lowest; 
      }  





    public static double getTotal1(double[] x) 
      { 
      double total = 0; 
      for (int index = 0; index < x.length; index++) 
      { 
      total += x [index];   
      }   
      System.out.println("Total: "+total); 
      return total; 
      } 
    public static double getAverage1(double[] x) 
      { 
      double total = 0;  
      for (int index = 0; index < x.length; index++) 
      { 
       total += x [index];   
      }   
      double average = (total/2.0); 
      System.out.println("Average: "+average); 
      return average; 
      } 
     public static double getHighest1 (double[] x) 
      { 
      double highest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]>highest) 
      highest=x[index]; 
      } 
      System.out.println("Highest: "+highest); 
      return highest; 
      } 
     public static double getLowest1 (double[] x) 
      { 
      double lowest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]<lowest) 
      lowest=x[index]; 
      } 
      System.out.println("Lowest: "+lowest); 
      return lowest; 
      } 




    public static float getTotal2(float[] x) 
      { 
      float total = 0; 
      for (int index = 0; index < x.length; index++) 
      { 
      total += x [index];   
      }   
      System.out.println("Total: "+total); 
      return total; 
      } 
    public static double getAverage2(float[] x) 
      { 
      float total = 0; 
      for (int index = 0; index < x.length; index++) 
      { 
       total += x [index];   
      }   
      double average = (total/2.0); 
      System.out.println("Average: "+average); 
      return average; 
      } 
     public static float getHighest2 (float[] x) 
      { 
      float highest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]>highest) 
      highest=x[index]; 
      } 
      System.out.println("Highest: "+highest); 
      return highest; 
      } 
     public static float getLowest2 (float[] x) 
      { 
      float lowest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]<lowest) 
      lowest=x[index]; 
      } 
      System.out.println("Lowest: "+lowest); 
      return lowest; 
      }  




    public static long getTotal3(long[] x) 
      { 
      long total = 0; 
      for (int index = 0; index < x.length; index++) 
      { 
      total += x [index];   
      }   
      System.out.println("Total: "+total); 
      return total; 
      } 
    public static double getAverage3(long[] x) 
      { 
      long total = 0; 
      for (int index = 0; index < x.length; index++) 
      { 
       total += x [index];   
      }   
      double average = (total/2.0); 
      System.out.println("Average: "+average); 
      return average; 
      } 
     public static long getHighest3 (long[] x) 
      { 
      long highest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]>highest) 
      highest=x[index]; 
      } 
      System.out.println("Highest: "+highest); 
      return highest; 
      } 
     public static long getLowest3 (long[] x) 
      { 
      long lowest = x[0]; 
      for (int index=1; index<x.length; index++) 
      { 
      if (x[index]<lowest) 
      lowest=x[index]; 
      } 
      System.out.println("Lowest: "+lowest); 
      return lowest; 
      }  





}