メソッドの出力をJavaのメインメソッドに戻すにはどうすればよいですか？

Question

import java.util.Scanner; 
import javax.swing.JOptionPane; 
import java.text.DecimalFormat; 

    public class Assignment51 
    { 
     public static void main(String[] args) 
     { 
      /* 
      Four Categories are used as a basis for compiling a rating: 
      1. Percentage of completions 
      2. Average yards gained 
      3. Percentage of touchdown passes per attempt 
      4. Percentage of interceptions per attempt 
      */ 

      // DecimalFormat formatter = new DecimalFormat("#,##0.000"); 

      String input;  //get user input 
      String name;   //player name 
      int completion;  //number of completions in percentages 
      int yardsGained;  //number of yards gained 
      int tdpasses;  //number of touchdown passes 
      int interceptions; //number of interceptions 
      int attempts;  //number of attempts 
      int yards;   //number of yards 
      double score;  //passer score 
      double totalScore; //total score 
      double totalPoints; //total award points 
      double total;  //total sum 

      //get player name 
      name = JOptionPane.showInputDialog("Type in the player name"); 


      //Creating Methods 

      PctCompletion(); 
      AvgYardsGain(); 
      PctTouchdown(); 
      PctInterceptions();  


      //RETURN TO MAIN METHOD 
      double PctCompletion, AvgYardsGain, PctTouchdown, PctInterceptions; 

      totalPoints = PctCompletion + AvgYardsGain + PctTouchdown + PctInterceptions; 

      total = (totalPoints/6) * 100; 

      //OUTPUT  
      JOptionPane.showMessageDialog(null, "total points: " + totalPoints + "\ntotal: " + total); 
      //JOptionPane.showMessageDialog(null, name + " earned a total of " + total + " award points.\n"); //GET HELP WITH OUTPUT 
     } 


     //calling the PctCompletion method. 
     public static double PctCompletion() 
     { 
      String input;      //user input 
      int num1;       //first input 
      int num2;       //second input total amount of passes 
      double percentComp = 0.0;   //percent completed. num1/num2 = percentComp 
      double pointRatingComp = 0.0;  //Completions point rating 
      double awardPoints1 = 0.0;   //awarded points +/- 2.375 

      input = JOptionPane.showInputDialog("Type in the TOTAL number of passes"); 
      num2 = Integer.parseInt(input); 

      input = JOptionPane.showInputDialog("Type in the number of COMPLETED passes"); 
      num1 = Integer.parseInt(input); 

      percentComp = ((num1/num2) * 100); 

      //point rating 
      pointRatingComp = ((percentComp - 30) * .05); 

      if (pointRatingComp < 0 && percentComp < 30.0) 
      awardPoints1 = 0.0; 

      if (pointRatingComp > 2.375 && percentComp > 77.5) 
      awardPoints1 = 2.375; 

      return awardPoints1;  
     } 


     //calling the AvgYardsGain method 
     public static double AvgYardsGain() 
     { 
      String input;      //user input 
      int num1;       //first input total yards 
      int num2;       //second input total attempts 
      double percentYard = 0.0;   //percent completed. num1/num2 = percentYard 
      double pointRatingYard = 0.0;  //Yards point rating 
      double awardPoints2 = 0.0;  //awarded points +/- 2.375 

      input = JOptionPane.showInputDialog("Type in the TOTAL number of attempts"); 
      num2 = Integer.parseInt(input); 

      input = JOptionPane.showInputDialog("Type in the TOTAL amount of yards"); 
      num1 = Integer.parseInt(input); 

      percentYard = ((num1/num2) * 100); 

      //point rating 
      pointRatingYard = ((percentYard - 3) * .25); 

      if (pointRatingYard < 0 && percentYard < 3) 
      awardPoints2 = 0; 

      if (pointRatingYard > 2.375 && percentYard > 12.5) 
      awardPoints2 = 2.375; 

      return awardPoints2; 
     } 


     //calling the PctTouchdown method 
     public static double PctTouchdown() 
     { 
      String input;      //user input 
      int num1;       //input total number of touchdowns 
      int num2;       //input total amount of attempts 
      double percentTD = 0.0;   //percent completed. num1/num2 = percentTD 
      double pointRatingTD = 0.0;  //touchdowns point rating 
      double awardPoints3 = 0.0;   //awarded points +/- 2.375 

      input = JOptionPane.showInputDialog("Type in the TOTAL number of pass ATTEMPTS"); 
      num2 = Integer.parseInt(input); 

      input = JOptionPane.showInputDialog("Type in the TOTAL number of TOUCHDOWNS"); 
      num1 = Integer.parseInt(input); 

      percentTD = ((num1/num2) * 100); 

      //point rating 
      pointRatingTD = (percentTD * .2); 

      if (pointRatingTD > 2.375 && percentTD > 11.875) 
      awardPoints3 = 2.375; 

      return awardPoints3;  
     } 


     //calling the PctInterceptions method 
     public static double PctInterceptions() 
     { 
      String input;      //user input 
      int num1;       //input total amount of interceptions 
      int num2;       //input total amount of attempts 
      double percentINT = 0.0;   //percent completed. num1/num2 = percentComp 
      double pointRatingINT = 0.0;  //Completions point rating 
      double awardPoints4 = 0.0;   //awarded points +/- 2.375 

      input = JOptionPane.showInputDialog("Type in the TOTAL number of pass ATTEMPTS"); 
      num2 = Integer.parseInt(input); 

      input = JOptionPane.showInputDialog("Type in the TOTAL amount of INTERCEPTIONS"); 
      num1 = Integer.parseInt(input); 

      percentINT = ((num1/num2) * 100); 

      //point rating 
      pointRatingINT = 2.375 - (percentINT * .25); 

      if (pointRatingINT < 0 && percentINT > 9.5) 
      awardPoints4 = 0; 
      else 
      awardPoints4 = 2.375; 

      return awardPoints4; 
     } 
    } 

戻り値（受賞点）は、メソッドから受け取った値から計算を実行します。しかし、私はそうするときにエラーが発生しています。 これは問題のコードの一部です。

//RETURN TO MAIN METHOD 
       double PctCompletion, AvgYardsGain, PctTouchdown, PctInterceptions; 

       totalPoints = PctCompletion + AvgYardsGain + PctTouchdown + PctInterceptions; 

       total = (totalPoints/6) * 100; 

Answer 1

あなたは

totalPoints = PctCompletion + AvgYardsGain + PctTouchdown + PctInterceptions; 

あなたは変数に戻り値を代入して、これらの変数を使用する必要があります

totalPoints = PctCompletion() + AvgYardsGain() + PctTouchdown() + PctInterceptions(); 

Answer 2

に補正する必要がある関数を呼び出す際に括弧を使用する必要があります。あなたは私たちに表示されるエラーメッセージを伝えることができなかった

// Creating Methods 

    double PctCompletion = PctCompletion(); 
    double AvgYardsGain = AvgYardsGain(); 
    double PctTouchdown = PctTouchdown(); 
    double PctInterceptions = PctInterceptions(); 

    // RETURN TO MAIN METHOD 

    totalPoints = PctCompletion + AvgYardsGain + PctTouchdown + PctInterceptions; 

    total = (totalPoints/6) * 100;