java中RainFall程序中的輸出錯誤

Question

我寫了一個關於計算一年中下雨的平均值並給我最高和最低金額的程序，但我收到一個錯誤，但我無法修復它。

這是我的主要代碼：`

public class Rainfall { 

//field 
private double [] rain; 

public void Rainfall (double [] array) { 

    rain = new double [array.length] ; 

    for (int i=0; i < array.length ; i++) 

     rain [i] = array [i]; 
} 

//Methods 
public double getTotal() { 

    double total = 0; 

    for (double r : rain) 

total +=r; 
    return total; 

} 

public double getAverage() { 

    double a = getTotal()/rain.length; 

    return a; 
} 

public double getHighest() { 

    double highest = rain [0]; 

    for (int i=0 ; i < rain.length; i++) { 

     if (rain [i] > highest) ; 
     highest = rain [i]; 
} 
    return highest;   
} 

public double getLowest() { 

    double lowest = rain [0]; 

    for (int i=0; i <rain.length; i++) { 

     if (rain [i] < lowest) ; 

     lowest = rain [i]; 
    } 
    return lowest; 
} 

} 

` ，這是演示：

` 
    import java.util.Scanner; 
    import java.text.DecimalFormat; 


    public class RainFallDemo { 

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


     final int year1 = 12; 

     double [] rains = new double [year1]; 

     getData (rains) ; 

     Rainfall rainfallData = new Rainfall(); 

     DecimalFormat values = new DecimalFormat ("#0.00") ; 

     System.out.println("The total rain is" + values.format(rainfallData.getTotal())); 
     System.out.println("The average is " + values.format (rainfallData.getAverage())); 
     System.out.println("The highest rain is " + values.format (rainfallData.getHighest())); 
     System.out.println("The lowest is " + values.format (rainfallData.getLowest())); 




    } 

    public static void getData (double [] array) { 

     Scanner keyboard = new Scanner (System.in) ; 

     for (int i=0 ; i < array.length; i++) 
     { 

      System.out.println ("what was the amont of rain for month " + (i + 1) + "?"); 

      array [i] = keyboard.nextDouble(); 

      while (array[i] < 0) 
      { 
       System.out.print (" Invalid input. You entered a negative number. Enter a" + 
      "value that is greater than zero"); 
      array [i] = keyboard.nextDouble(); 

      } 
    } 
} 
}` 

我得到了錯誤的最低和錯誤的最高和程序有哪些月份顯示有輸出的最低和最高，但我無法弄清楚代碼！

Answer 1

刪除if行尾部的分號。如果在true時執行空語句，那會導致if。然後，無論如何，下一行始終執行。