在线考试系统__简单java代码

Online Exam Questions()

***************************************************************Index.java

import java.io.BufferedReader;

import java.io.InputStreamReader;

public class Index {

static int adminMenu() {

int choice = 0;

try {

BufferedReader br = new BufferedReader(new InputStreamReader(

System.in));

System.out.println("1 . Register Qustions");

System.out.println("2 . Start Exam");

System.out.println("3 . Get out");

choice = Integer.parseInt(br.readLine());

} catch (Exception e) {

System.out.println("Enter is error");

}

return choice;

}

public static void main(String[] args) {

System.out.println("Welcome to Online Exam System");

int choice;

do {

choice = adminMenu();

switch (choice) {

case 1:

Questions br = new Questions();

br.QuestionList();

break;

case 2:

Questions temp = new Questions();

temp.exam();

break;

}

} while (choice != 3);

System.out.println("Thank You ");

}

}

*******************************************************questions.java

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.Iterator;

import java.util.Random;

public class Questions {

int questionNumber;

String question;

String optionA;

String optionB;

String optionC;

String optionD;

String correctOption;

static int Qnumber;

static ArrayList a1 = new ArrayList(10);

boolean b = true;

void QuestionList() {

try {

BufferedReader br = new BufferedReader(new InputStreamReader(

System.in));

System.out.println("Enter QuestionNumber : ");

this.questionNumber = Integer.parseInt(br.readLine());

if (Qnumber != 0) {

for (int i = 0; i < Qnumber; i++) {

Questions q = (Questions) a1.get(i);

if (this.questionNumber == q.questionNumber) {

System.out.println("questionNumber is extist");

b = false;

break;

}

}

}

if (b) {

System.out.println("Enter Question : ");

this.question = br.readLine();

System.out.println("Enter Option-A :");

this.optionA = br.readLine();

System.out.println("Enter Option-B :");

this.optionB = br.readLine();

System.out.println("Enter Option-C :");

this.optionC = br.readLine();

System.out.println("Enter Option-D :");

this.optionD = br.readLine();

System.out.println("Enter correctAnswer :");

this.correctOption = br.readLine();

question();

}

} catch (Exception e) {

System.out.println("Enter handled the exception");

}

}

void question() {

Questions q1 = new Questions();

q1 = this;

a1.add(q1);

Qnumber++;

System.err.println("Register success");

System.out.println("Total Questions Registered = " + Qnumber);

}

void exam() {

if (Qnumber != 0) {

System.out.println("Start Exam");

if (Qnumber < 5) {

System.out.println("How many questions :" + (Qnumber));

} else {

System.out.println("How many questions : 5");

}

Random random = new Random();

HashSet h1 = new HashSet();

for (int i = 0; i < 5; i++) {

h1.add(random.nextInt(Qnumber));

}

Iterator iterator = h1.iterator();

while (iterator.hasNext()) {

Questions q1 = (Questions) a1.get((Integer) iterator.next());