package cn.edu.xidian.crytoll;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.JLabel;

import javax.swing.UIManager;

import javax.swing.border.EmptyBorder;

import javax.swing.border.TitledBorder;

public class ArrayExample {

	private JFrame frame;

	private JTextField textField;

	private JScrollPane scrollPane;

	private JLabel label_1;

	JTextArea textArea = new JTextArea();

	private JTextArea textArea_1;

	/**

	 * Launch the application.

	 */

	public static void main(String[] args) {

		EventQueue.invokeLater(new Runnable() {

			public void run() {

				try {

					ArrayExample window = new ArrayExample();

					window.frame.setVisible(true);

				} catch (Exception e) {

					e.printStackTrace();

				}

			}

		});

	}

	/**

	 * Create the application.

	 */

	public ArrayExample() {

		initialize();

	}

	/**

	 * Initialize the contents of the frame.

	 */

	private void initialize() {

		frame = new JFrame("利用数组随机抽取幸运观众");

		frame.setBounds(100, 100, 500, 300);

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		frame.getContentPane().setLayout(null);

		JLabel label = new JLabel("\u8F93\u5165\u5728\u573A\u89C2\u4F17\u59D3\u540D\u6309\u56DE\u8F66");

		label.setBounds(10, 10, 132, 15);

		frame.getContentPane().add(label);

		textField = new JTextField();

		textField.addKeyListener(new KeyAdapter() {

			@Override

			public void keyPressed(KeyEvent e) {

				do_textField_keyPressed(e);

			}

		});

		textField.setBounds(10, 35, 132, 21);

		frame.getContentPane().add(textField);

		textField.setColumns(10);

		scrollPane = new JScrollPane();

		scrollPane.setBounds(10, 66, 132, 185);

		frame.getContentPane().add(scrollPane);		

		textArea_1 = new JTextArea();

		scrollPane.setViewportView(textArea_1);

		label_1 = new JLabel("\u9009\u53D6\u89C2\u4F17\u4EBA\u5458\uFF1A");

		label_1.setBounds(180, 10, 132, 15);

		frame.getContentPane().add(label_1);

		textArea.setBounds(180, 34, 214, 217);

		frame.getContentPane().add(textArea);

		JButton button = new JButton("\u62BD\u53D6");

		button.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent e) {

				do_button_actionPerformed(e);

			}

		});

		button.setBounds(404, 187, 70, 23);

		frame.getContentPane().add(button);

		JButton button_1 = new JButton("\u9000\u51FA");

		button_1.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent e) {

				do_button_1_actionPerformed(e);

			}

		});

		button_1.setBounds(404, 228, 70, 23);

		frame.getContentPane().add(button_1);

	}

	protected void do_textField_keyPressed(KeyEvent e) {

        if (e.getKeyChar() != '\n')// 不是回车字符不做处理

            return;

        String name = textField.getText();

        if (name.isEmpty())// 如果文本框没有字符串不做处理

            return;

        textArea_1.append(name + "\n");// 把输入人名与回车符添加到人员列表

        textField.selectAll();// 选择文本框所有字符

    }

	protected void do_button_actionPerformed(ActionEvent e) {

        String perstring = textArea_1.getText();// 获取人员列表文本

        String[] personnelArray = perstring.split("\n{1,}");// 获取人员数组

        int index = (int) (Math.random() * personnelArray.length);// 生成随机数组索引

        // 定义包含格式参数的中奖信息

        String formatArg = "本次抽取观众人员：\n\t%1$s\n恭喜%1$5s成为本次观众抽奖的大奖得主。"

                + "\n\n我们将为%1$5s颁发：\n\t过期的酸奶二十箱。";

        // 为中奖信息添加人员参数

        String info = String.format(formatArg, personnelArray[index]);

        textArea.setText(info);// 在文本域显示中奖信息

    }

	protected void do_button_1_actionPerformed(ActionEvent e) {

		System.exit(0);

    }

}