如何在Java中编写非void方法输出选手评分汇总信息

Let's modify your existing code to include a non-void method that generates and returns a formatted summary of the contestant's scores. We'll also clean up some naming to follow standard Java conventions (camelCase for methods and variables) for better readability.

Modified Complete Code #

import java.util.Scanner;

public class SportsEvents {
    public static void main(String[] args) {
        String[] contestants = getContestants();
        int[] scores = getScores();
        
        // Call our new summary method and print the result
        String scoreSummary = getSummary(contestants, scores);
        System.out.println(scoreSummary);
    }

    public static String[] getContestants() {
        int numContestants = 1;
        String[] names = new String[numContestants];
        Scanner ip = new Scanner(System.in); // Reuse scanner instead of creating inside loop
        
        for (int j = 0; j < numContestants; j++) {
            System.out.println("Enter contestant's name");
            names[j] = ip.nextLine();
        }
        ip.close(); // Clean up scanner resource
        return names;
    }

    public static int[] getScores() {
        int numScores = 8;
        int[] scores = new int[numScores];
        Scanner ip = new Scanner(System.in);
        
        for (int a = 0; a < numScores; a++) {
            System.out.println("Enter score " + (a + 1) + ":"); // Add score number for clarity
            scores[a] = ip.nextInt();
        }
        ip.close();
        return scores;
    }

    public static int getMaxValue(int[] array) {
        int maxValue = array[0];
        for (int i = 1; i < array.length; i++) {
            if (array[i] > maxValue) {
                maxValue = array[i];
            }
        }
        return maxValue;
    }

    public static int getMinValue(int[] array) {
        int minValue = array[0];
        for (int i = 1; i < array.length; i++) {
            if (array[i] < minValue) {
                minValue = array[i];
            }
        }
        return minValue;
    }

    public static int getAverage(int[] scores) {
        int sum = 0;
        for (int score : scores) { // Enhanced for-loop for cleaner code
            sum += score;
        }
        return sum / scores.length;
    }

    // New non-void method to generate formatted summary
    public static String getSummary(String[] contestants, int[] scores) {
        String contestantName = contestants[0];
        int highestScore = getMaxValue(scores);
        int lowestScore = getMinValue(scores);
        int averageScore = getAverage(scores);
        
        // Build summary with StringBuilder for efficient string concatenation
        StringBuilder summary = new StringBuilder();
        summary.append("=== Contestant Score Summary ===\n");
        summary.append("Contestant Name: ").append(contestantName).append("\n");
        summary.append("Highest Score: ").append(highestScore).append("\n");
        summary.append("Lowest Score: ").append(lowestScore).append("\n");
        summary.append("Average Score: ").append(averageScore).append("\n");
        summary.append("================================");
        
        return summary.toString();
    }
}

Key Changes Explained #

• New getSummary Method: This non-void method takes the contestants and scores arrays as inputs. It retrieves the contestant name, leverages your existing helper methods to calculate max/min/average, then builds a neatly formatted string and returns it.
• Java Naming Conventions: Renamed methods like getcontestants to getContestants and variables like numcontestants to numContestants to align with industry standards.
• Scanner Optimization: Reused a single Scanner instance per method instead of creating new ones inside loops, and closed them to prevent resource leaks.
• User-Friendly Input: Added score number prompts (e.g., "Enter score 1:") to make the input process clearer for the user.

Example Output #

If you input the name James followed by scores 1 through 8, the program will output:

=== Contestant Score Summary ===
Contestant Name: James
Highest Score: 8
Lowest Score: 1
Average Score: 4
================================

内容的提问来源于stack exchange，提问作者Amadou Toure