关于Java的一个简单考试程序，出题与答题的交互

Question

不知道如何编写check（）方法来达到判断对错，check（）方法中的语句return answers[0]==answer;放在判断条件前面就显示出错，放在后面，不论答案是什么都判断为正确。

import java.util.Arrays;
import java.util.Scanner;

public class TestQuestion {
public static void main(String[] args) {
SingleQuestion s = new SingleQuestion("最早向刘备推荐诸葛亮的是谁？",new String[]{"A.徐庶","B.司马徽","C.鲁肃","D.关羽"},'A');
s.show();
Scanner answers= new Scanner(System.in);
String x=answers.next();
char[] answer = {'A'};
s.check(answer);
char[] g = new char[x.length()];

MultiQuestion m = new MultiQuestion("三国演义中的三绝是谁？",new String[]{"A.曹操","B.刘备","C.关羽","D.诸葛亮"},new char[]{'A','C','D'});
m.show();
Scanner sc= new Scanner(System.in);
String y=sc.next();
char[] answers1 = {'A','B','D'};
m.check(answers1);
char[] h = new char[y.length()];

}
}

class Question {
protected String text;//测试题

 public Question() { }//无参构造
 public Question(String text) {//有参构造
     this.text = text; 
 }

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}

//展示方法
public void show() {
    
}

//检测答案的方法
public boolean check(String[] answers) {
return true;
}
}

class SingleQuestion extends Question{
char[] answers;
char answer;
String[] options;
String text;

 public SingleQuestion() {
        
    }
 
 public SingleQuestion(String text, String[] options, char answer) {
        this.text = text;
        this.options = options;
        this.answer = answer;
        
    }
 
 public boolean check(char[] answers) {
     this.answers=answers;
     return answers[0]==answer;
     if(answers.length>1||answers.length==0) 
           System.out.println("还得努力呀！");
       else if(answer==answers[0])
           System.out.println("恭喜，答对了！");
       else
           System.out.println("还得努力呀！"); 
     
         
       
 }
 public void show() {
     System.out.println(text);
     System.out.println(Arrays.toString(options));
     System.out.println("请选择:");
      
 }

}

class MultiQuestion extends Question{
char[] answers;
String[] options;

public MultiQuestion() {
    
}

public MultiQuestion(String text, String[] options, char[] answers) {
        this.text = text;
        this.options = options;
        this.answers = answers;
    }

public char[] check(char[] answers) {
    return this.answers=answers ;
}

public void show() {
    System.out.println(text);
    System.out.println(Arrays.toString(options));
    System.out.print("请选择：");
 }

}

Answer 1

我先给个还算正确的答案，你先参考一下：

package com.example;

import java.util.Arrays;
import java.util.Scanner;

class Question {
    String text;
    String[] options;

    Question() {
    }

    Question(String text, String[] options) {
        this.text = text;
        this.options = options;
    }

    boolean check(char[] answers) {
        return false;
    }

    void print() {
    }
}

class MultiChoice extends Question {
    char[] answer;

    MultiChoice() {
    }

    MultiChoice(String text, String[] options, char[] answer) {
        this.text = text;
        this.options = options;
        this.answer = answer;
        System.out.println(text);
        System.out.println(Arrays.toString(options));
    }

    boolean check(char[] answers) {
        if (answers.length < answer.length || answers.length > answer.length)
            System.out.println("还得努力呀！");
        else {
            int[] rest;
            rest = new int[answer.length];
            for (int i = 0; i < answer.length; i++) {
                rest[i] = Arrays.binarySearch(answer, answer[i]);
                if (rest[i] < 0) {
                    System.out.println("还得努力呀！");
                    break;
                } 
                if (rest[answer.length-1] > 0)
                    System.out.println("恭喜，答对了！");
            }
        }
        return true;
    }
}

class SingleChoice extends Question {
    char answer;
    char[] answers;

    SingleChoice() {
    }

    SingleChoice(String text, String[] options, char answer) {
        this.text = text;
        this.options = options;
        this.answer = answer;
        System.out.println(text);
        System.out.println(Arrays.toString(options));
    }

    boolean check(char[] answers) {
        this.answers = answers;
        return answers[0] == answer;

    }

    void print() {
        if (answers.length > 1 || answers.length == 0)
            System.out.println("还得努力呀！");
        else if (answer == answers[0])
            System.out.println("恭喜，答对了！");
        else
            System.out.println("还得努力呀！");
    }
}

public class Test {
    
    public static void main(String args[]) {
        MultiChoice A = new MultiChoice("三国演义中的三绝是谁？", new String[] { "A.曹操", "B.刘备", "C.关羽", "D.诸葛亮" },
                new char[] { 'A', 'C', 'D' });
        System.out.print("请选择：");
        Scanner sc = new Scanner(System.in);
        String x = sc.next();
        char[] z;
        z = new char[x.length()];
        for (int i = 0; i < x.length(); i++) {
            z[i] = x.charAt(i);
            z[i] = Character.toUpperCase(z[i]);
        }
        A.check(z);
        A.print();
        SingleChoice B = new SingleChoice("最早向刘备推荐诸葛亮的是谁？", new String[] { "A.徐庶", "B.司马徽", "C.鲁肃", "D.关羽" }, 'A');
        System.out.print("请选择：");
        String y = sc.next();
        char[] g;
        g = new char[y.length()];
        for (int i = 0; i < y.length(); i++) {
            g[i] = y.charAt(i);
            g[i] = Character.toUpperCase(g[i]);
        }
        B.check(g);
        B.print();
        sc.close();
    }
}