Question

我已尝试查看其他主题并尝试自行修复此错误。你能帮我解决下面的Java代码吗？我收到以下错误error: illegal start of expression

很抱歉，如果我没有正确发布这个问题，我就不知道在这个论坛上哪里可以找到行编号功能。

import java.util.*;
public class PracFive {
    private static boolean continueGame()
    {
        System.out.println("Do you want to play again? (Y/N)");
        String answer = new Scanner(System.in).next();
        return answer.trim().toLowerCase().equals("y");
    }

    private static void playGame(List<String> names)
    {
        System.out.println();
        System.out.println("List size: " + names.size());
        Random rand = new Random();

        int guessInt = rand.nextInt(names.size());
        String ComputersGuess = names.get(guessInt);

        boolean isWrong = false;
        int trial = 0;
        Scanner input = new Scanner(System.in);

        System.out.println("A random color was chosen choose which one: ");

    while (isWrong)
    {
        trial++;
        String humanGuess = input.next();

        if (humanGuess.trim().toLowerCase().equals(ComputersGuess.toLowerCase()))
        {
            isWrong = false;
            System.out.println("Yeey! you got it");
            names.remove(guessInt);
        }else{
            System.out.println("Try again, dude!");
        }
        if (trial == 1){
            String firstletter = ComputersGuess.substring(0,1);
            System.out.println("First Letter is: " + firstletter);
        }else if(trial == 2){
            System.out.println("Number of letters: " + ComputersGuess);
        }else if(trial == 3){
            isWrong = false;
        }
    }

     public static main(String[] args) 
     {

        List<String> names = new ArrayList<>();

        names.add("Yellow");
        names.add("Red");
        names.add("Blue");
        names.add("Maroon");
        names.add("Pink");
        names.add("Purple");
        names.add("Black");
        names.add("Orange");
        names.add("White");
        names.add("Green");

        System.out.format("%d\t\t%s","Index", "Color name");
        System.out.println();

        int count = 0;
        for(String name: names)
        {
            System.out.format("%d\t\t%s",count++,name);
        }

        playGame(names);

        boolean isInterested = continueGame();

        while(isInterested)
        {
            playGame(names);
            isInterested = continueGame();
        }
    }

Answer 1

您收到错误是因为您尝试将字符串格式化为double。你的问题就在这里

System.out.format（“％d \ t \ t％s”，“索引”，“颜色名称”）;

删除或修复此行，并修复其他人提及的其他问题。

在Java中获取表达式错误

1 个答案: