次の変数セットを方程式に割り当てるにはどうすればよいですか？

Question

テキストファイルからデータを読み込むプログラムを作成しなければなりませんでした。私は最初の最初の変数を読み込んで方程式に入れましたが、残りの変数をどのように設定するのかはかなり不明です。

public static void main(String[] args) throws Exception 
{ 
// Scanner stdIn = new Scanner(System.in); 
    Scanner stdIn = new Scanner(new File("energyProduced.txt")); 
     stdIn.nextDouble(); 
     double energy1; 
     double energy2; 
     double energy3; 
     double energy4; 
     double energy5; 
     double energy6; 
     double energy7; 
     energy1 = stdIn.nextDouble(); 
     energy2 = stdIn.nextDouble(); 
     energy3 = stdIn.nextDouble(); 
     energy4 = stdIn.nextDouble(); 
     energy5 = stdIn.nextDouble(); 
     energy6 = stdIn.nextDouble(); 
     energy7 = stdIn.nextDouble(); 
    int systemsCost; //Total Systems Cost 
    double ttlEnergy; //Total energy produced in a week 
    double savingsWeek; //Total savings for one week 
    double savingsDay; //Total savings for one day 
    double recoupDay; //Days to recoup 
    double recoupYear; //Years to recoup 
    final double electricCost = 0.085; 
// 

    ttlEnergy = (energy1 * 7); 
    savingsWeek = (ttlEnergy * electricCost); 
    savingsDay = (savingsWeek/7); 
    systemsCost = (int) (savingsWeek * energy1); 
    recoupDay = (int) (systemsCost/savingsDay); 
    recoupYear = (int) (recoupDay/365); 


// 
    System.out.println("Total System Cost = $" + systemsCost); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek); 
    System.out.println("Total Savings for one day =" + savingsDay); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear); 
    System.out.println(); 

残りはエネルギー2を読み込みません2-7、残りの部分を読み込むにはどうすればよいですか？ 編集 .txtファイルは、番号のリストです： 私はそれを書き直しました23（それはこれだけを読み込む）など

EDIT2

少し。

public static void main(String[] args) throws Exception 
{ 
// Scanner stdIn = new Scanner(System.in); 
    Scanner stdIn = new Scanner(new File("energyProduced.txt")); 
     stdIn.nextDouble(); 
     double energy1; 
     double energy2; 
     double energy3; 
     double energy4; 
     double energy5; 
     double energy6; 
     double energy7; 
     energy1 = stdIn.nextDouble(); 
     energy2 = stdIn.nextDouble(); 
     energy3 = stdIn.nextDouble(); 
     energy4 = stdIn.nextDouble(); 
     energy5 = stdIn.nextDouble(); 
     energy6 = stdIn.nextDouble(); 
     energy7 = stdIn.nextDouble(); 
    int systemsCost; //Total Systems Cost 
    double ttlEnergy; //Total energy produced in a week 
    double savingsWeek; //Total savings for one week 
    double savingsDay; //Total savings for one day 
    double recoupDay; //Days to recoup 
    double recoupYear; //Years to recoup 
    int systemsCost2; //Total Systems Cost 
    double ttlEnergy2; //Total energy produced in a week 
    double savingsWeek2; //Total savings for one week 
    double savingsDay2; //Total savings for one day 
    double recoupDay2; //Days to recoup 
    double recoupYear2; //Years to recoup 
    int systemsCost3; //Total Systems Cost 
    double ttlEnergy3; //Total energy produced in a week 
    double savingsWeek3; //Total savings for one week 
    double savingsDay3; //Total savings for one day 
    double recoupDay3; //Days to recoup 
    double recoupYear3; //Years to recoup 
    int systemsCost4; //Total Systems Cost 
    double ttlEnergy4; //Total energy produced in a week 
    double savingsWeek4; //Total savings for one week 
    double savingsDay4; //Total savings for one day 
    double recoupDay4; //Days to recoup 
    double recoupYear4; //Years to recoup 
    int systemsCost5; //Total Systems Cost 
    double ttlEnergy5; //Total energy produced in a week 
    double savingsWeek5; //Total savings for one week 
    double savingsDay5; //Total savings for one day 
    double recoupDay5; //Days to recoup 
    double recoupYear5; //Years to recoup 
    int systemsCost6; //Total Systems Cost 
    double ttlEnergy6; //Total energy produced in a week 
    double savingsWeek6; //Total savings for one week 
    double savingsDay6; //Total savings for one day 
    double recoupDay6; //Days to recoup 
    double recoupYear6; //Years to recoup 
    int systemsCost7; //Total Systems Cost 
    double ttlEnergy7; //Total energy produced in a week 
    double savingsWeek7; //Total savings for one week 
    double savingsDay7; //Total savings for one day 
    double recoupDay7; //Days to recoup 
    double recoupYear7; //Years to recoup 
    final double electricCost = 0.085; 


    ttlEnergy = (energy1 * 7); 
    savingsWeek = (ttlEnergy * electricCost); 
    savingsDay = (savingsWeek/7); 
    systemsCost = (int) (savingsWeek * energy1); 
    recoupDay = (int) (systemsCost/savingsDay); 
    recoupYear = (int) (recoupDay/365); 
    ttlEnergy2 = (energy2 * 7); 
    savingsWeek2 = (ttlEnergy * electricCost); 
    savingsDay2 = (savingsWeek/7); 
    systemsCost2 = (int) (savingsWeek * energy2); 
    recoupDay2 = (int) (systemsCost/savingsDay); 
    recoupYear2 = (int) (recoupDay/365); 
    ttlEnergy3 = (energy3 * 7); 
    savingsWeek3 = (ttlEnergy * electricCost); 
    savingsDay3 = (savingsWeek/7); 
    systemsCost3 = (int) (savingsWeek * energy3); 
    recoupDay3 = (int) (systemsCost/savingsDay); 
    recoupYear3 = (int) (recoupDay/365); 
    ttlEnergy4 = (energy4 * 7); 
    savingsWeek4 = (ttlEnergy * electricCost); 
    savingsDay4 = (savingsWeek/7); 
    systemsCost4 = (int) (savingsWeek * energy4); 
    recoupDay4 = (int) (systemsCost/savingsDay); 
    recoupYear4 = (int) (recoupDay/365); 
    ttlEnergy5 = (energy5 * 7); 
    savingsWeek5 = (ttlEnergy * electricCost); 
    savingsDay5 = (savingsWeek/7); 
    systemsCost5 = (int) (savingsWeek * energy5); 
    recoupDay5 = (int) (systemsCost/savingsDay); 
    recoupYear5 = (int) (recoupDay/365); 
    ttlEnergy6 = (energy6 * 7); 
    savingsWeek6 = (ttlEnergy * electricCost); 
    savingsDay6 = (savingsWeek/7); 
    systemsCost6 = (int) (savingsWeek * energy6); 
    recoupDay6 = (int) (systemsCost/savingsDay); 
    recoupYear6 = (int) (recoupDay/365); 
    ttlEnergy7 = (energy7 * 7); 
    savingsWeek7 = (ttlEnergy * electricCost); 
    savingsDay7 = (savingsWeek/7); 
    systemsCost7 = (int) (savingsWeek * energy7); 
    recoupDay7 = (int) (systemsCost/savingsDay); 
    recoupYear7 = (int) (recoupDay/365); 


    System.out.println("Total System Cost = $" + systemsCost); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek); 
    System.out.println("Total Savings for one day =" + savingsDay); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear); 
    System.out.println(); 
    System.out.println("Total System Cost = $" + systemsCost2); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy2) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek2); 
    System.out.println("Total Savings for one day =" + savingsDay2); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay2); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear2); 
    System.out.println(); 
    System.out.println("Total System Cost = $" + systemsCost3); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy3) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek3); 
    System.out.println("Total Savings for one day =" + savingsDay3); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay3); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear3); 
    System.out.println(); 
    System.out.println("Total System Cost = $" + systemsCost4); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy4) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek4); 
    System.out.println("Total Savings for one day =" + savingsDay4); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay4); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear4); 
    System.out.println(); 
    System.out.println("Total System Cost = $" + systemsCost5); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy5) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek5); 
    System.out.println("Total Savings for one day =" + savingsDay5); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay5); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear5); 
    System.out.println(); 
    System.out.println("Total System Cost = $" + systemsCost6); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy6) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek6); 
    System.out.println("Total Savings for one day =" + savingsDay6); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay6); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear6); 
    System.out.println(); 
    System.out.println("Total System Cost = $" + systemsCost7); 
    System.out.println("Total Energy Produced in one week" + (ttlEnergy7) + "Kwh"); 
    System.out.println("Total Savings for one week =" + savingsWeek7); 
    System.out.println("Total Savings for one day =" + savingsDay7); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay7); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear7); 
    System.out.println(); 

} // end main 

それは大丈夫コンパイルしたが、それは私にこれは間違いなく宿題を探しますException in thread "main" java.util.NoSuchElementException

Answer 1

を与えます。あなたのためにあなたを助けるためのいくつかの指針があります。あなたのコードは非常に冗長で長く、コードのバグの量はコードの行に直接比例します。したがって、コードの行数が少なくて済みます。 Javaには、リストや配列などのデータ構造がありますので、使用するすべての変数を記述する必要はありません。私は上級開発者ではなく、私は専門家ではないと主張していませんが、これは中間レベルの開発者がこの問題に取り組む方法です。 *メモ：私はメモ帳++を使用していたので、私はこれをコンパイルする機会を得なかったし、私の他のコンピュータを持っていなかった。

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

    // i like to underscore my static final variables 
    // so i know when i use them 
    static final double _electricCost = 0.085; 

    int systemsCost = 0; 

    List<Double> energyProductList = new ArrayList(); 

    Scanner fileScanner = new Scanner(new File("energyProduced.txt")); 

    //to prevent the no such element error you need to make sure 
    // there is an element to be had with 

    while(fileScanner.hasNext()) 
    { 
     //your values looked like ints so we'll use that 
     int energyProduced = fileScanner.nextInt(); 
     energyProductList.add(energyProduced); 
    } 

    // now that we've grabbed all our energy values we can 
    // iterate them and do the calculations we need 

    // we will create some lists to contain our summary data 

    List<Integer> weeklyEnergy = new ArrayList(); 
    List<Double> weeklySavings = new ArrayList(); 
    List<Double> savingsPerDay = new ArrayList(); 
    List<Double> systemsCost = new ArrayList(); 
    List<Integer> recoupDay = new ArrayList(); 
    List<Integer> recoupYear = new ArrayList(); 


    for(int energy:energyProductList) 
    { 
     int tempWeeklyEnergy = energy * 7; 
     double tempWeeklySavings = tempWeeklyEnergy * _electricCost; 
     double tempSavingsPerDay = tempWeeklySavings/7; 
     double tempSystemsCost = tempWeeklySavings * energy; 
     int tempRecoupDay = (int)(tempSystemsCost/tempSavingsPerDay); 
     int tempRecoupYear = (int) (recoupDay/365); 


     //here we are putting all our calculated values in their corresponding 
     // containers 
     weeklyEnergy.add(tempWeeklyEnergy); 
     weeklySavings.add(tempWeeklySavings); 
     savingsPerDay.add(tempSavingsPerDay); 
     systemsCost.add(tempSystemsCost); 
     recoupDay.add(tempRecoupDay); 
     recoupYear.add(tempRecoupYear); 
    } 

    //now that we have our values in nice lists so the length of them can be as big 
    // or as small as they want we can print 

    int max = energyProductList.size(); 
    int counter = 0; 
    while(counter <= max) 
    { 
    System.out.println("Energy -> " + counter) 
    System.out.println("Total System Cost = $" + systemsCost.get(counter)); 
    System.out.println("Total Energy Produced in one week" + (weeklyEnergy.get(counter)) + "Kwh"); 
    System.out.println("Total Savings for one week =" + weeklySavings.get(counter)); 
    System.out.println("Total Savings for one day =" + savingsPerDay.get(counter)); 
    System.out.println("Days to recoup cost(truncated)" + recoupDay.get(counter)); 
    System.out.println("Years to recoup cost(truncated)" + recoupYear.get(counter)); 
    System.out.println(); 
    } 




}