1. 考试UI的实现
   代码如下：

package com.zjipc.kaoshi.ui;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Image;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;

public class ExamFrame extends JFrame {
	public static void main(String[] args) {
		ExamFrame window = new ExamFrame();
		window.setVisible(true);
	}

	private JLabel examInfo1;
	private JTextArea questionArea;
	private JButton prev;
	private JButton next;
	private JButton send;
	private Option[] options = new Option[4];
	private JLabel questionCount;
	private JLabel timer;

	public ExamFrame() {
		init();
	}

	private void init() {
		setTitle("ZJIPC认证软件开发工程师考试平台");
		setSize(650, 400);
		try {
			Image image = ImageIO.read(getClass().getResource("../images/inco.jpg"));
			setIconImage(image);
		} catch (IOException e) {
			e.printStackTrace();
		}
		setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				if (JOptionPane.YES_OPTION == JOptionPane.showConfirmDialog(ExamFrame.this, "确定要退出吗？", "离开系统",
						JOptionPane.YES_NO_OPTION)) {
					System.exit(0);
				}
			}
		});
		setResizable(false);
		setLocationRelativeTo(null);
		add(createContentPanel());
	}

	private Component createContentPanel() {
		JPanel panel = new JPanel(new BorderLayout());
		panel.setBorder(new EmptyBorder(0, 8, 0, 8));
		ImageIcon icon = new ImageIcon(getClass().getResource("../images/exam_title.png"));
		panel.add(BorderLayout.NORTH, new JLabel(icon));
		panel.add(BorderLayout.CENTER, createCenterPanel());
		panel.add(BorderLayout.SOUTH, createBottomPanel());
		return panel;
	}

	private Component createCenterPanel() {
		JPanel panel = new JPanel(new BorderLayout());
		examInfo1 = new JLabel("姓名: 马小明 考号：1001 开始时间：120分钟 开始科目：Java初级工程师认证考试 题目数量：50", JLabel.CENTER);
		panel.add(BorderLayout.NORTH, examInfo1);
		panel.add(BorderLayout.CENTER, createQuestionsPanel());
		panel.add(BorderLayout.SOUTH, createOptionsPanel());
		return panel;
	}

	private Component createQuestionsPanel() {
		JScrollPane pane = new JScrollPane();
		pane.setBorder(new TitledBorder("题目"));
		Font font = new Font("宋体", Font.LAYOUT_LEFT_TO_RIGHT, 15);
		questionArea = new JTextArea();
		questionArea.setFont(font);
		questionArea.setText("问题\nA.\nB.\nC\nD.");
		questionArea.setLineWrap(true);
		questionArea.setEditable(false);
		pane.getViewport().add(questionArea);
		return pane;
	}

	private Component createOptionsPanel() {
		JPanel panel = new JPanel(new FlowLayout());
		Option a = new Option(0, "A");
		Option b = new Option(1, "B");
		Option c = new Option(2, "C");
		Option d = new Option(3, "D");
		options[0] = a;
		options[1] = b;
		options[2] = c;
		options[3] = d;
		panel.add(a);
		panel.add(b);
		panel.add(c);
		panel.add(d);
		return panel;
	}

	private Component createBottomPanel() {
		JPanel panel = new JPanel(new BorderLayout());
		String info = "题目：50道题中的第1道题";
		questionCount = new JLabel(info);
		panel.add(BorderLayout.WEST, questionCount);

		panel.add(BorderLayout.CENTER, createBtnPanel());
		String limitTime = "剩余时间119分钟";
		timer = new JLabel(limitTime);

		panel.add(BorderLayout.EAST, timer);
		return panel;
	}

	private Component createBtnPanel() {
		JPanel panel = new JPanel(new FlowLayout());
		prev = new JButton("<<上一题");
		next = new JButton("下一题>>");
		send = new JButton("交卷");

		panel.add(prev);
		panel.add(next);
		panel.add(send);

		return panel;
	}

	private class Option extends JCheckBox {
		int value;

		public Option(int val, String txt) {
			super(txt);
			this.value = val;
		}
	}

}