import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.util.Arrays;

import javax.swing.JTextField;
import javax.swing.JButton;

public class SwingOk extends JFrame {

	private static final long serialVersionUID = 1L;

	private JPanel jContentPane = null;

	private JLabel jLabel_input = null;

	private JTextField jTextField_input = null;

	private JButton jButton_sure = null;
	
	private JButton jButton_sur = null;

	private JLabel jLabel_title = null;

	private JButton jButton_cancel = null;
	
	private JTextField str2[] = new JTextField[20];

	private JLabel str[] = new JLabel[20];
	
	private JLabel jLabel_2 = null;

	private JTextField jText = null;
	
	private int n=0;

	public SwingOk() {
		super();
		initialize();
	}

	private void initialize() {
		this.setSize(315, 207);
		this.setContentPane(getJContentPane());
		this.setTitle("评分系统");
		this.setResizable(false);//设置不能更改大小
		((JPanel) this.getContentPane()).setOpaque(false);
		ImageIcon img = new ImageIcon("C:\\Myeclipse2\\编程思想\\BJ0.jpg");
		JLabel background = new JLabel(img);
		background.setSize(new Dimension(1024, 717));
		this.getLayeredPane().add(background, new Integer(Integer.MIN_VALUE));
		background.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());
	}

	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jLabel_title = new JLabel();
			jLabel_title.setBounds(new Rectangle(73, 20, 159, 36));
			jLabel_title.setText("1240131班评委评分系统");
			jLabel_input = new JLabel();
			jLabel_input.setBounds(new Rectangle(40, 81, 112, 28));
			jLabel_input.setText("请输入评委人数：");
			jContentPane = new JPanel();
			jContentPane.setLayout(null);
			jContentPane.add(jLabel_input, null);
			jContentPane.add(getJTextField_input(), null);
			jContentPane.add(getJButton_sure(), null);
			jContentPane.add(jLabel_title, null);
			jContentPane.add(getJButton_cancel(), null);

		}
		return jContentPane;
	}

	private JTextField getJTextField_input() {
		if (jTextField_input == null) {
			jTextField_input = new JTextField();
			jTextField_input.setBounds(new Rectangle(182, 81, 75, 27));
			jTextField_input.setToolTipText("请输入4到16的整数");
			/**
			 * 下面创建快捷键enter
			 */
			jTextField_input.addKeyListener(new java.awt.event.KeyListener() {
				public void keyPressed(java.awt.event.KeyEvent e) {
					if (e.getKeyCode() == 10) {
	                    if(jButton_sure.getText().equals("重置")){
	                    	jContentPane.remove(jLabel_2);
	                    	jContentPane.remove(jText);
	                    	jContentPane.remove(jButton_sur);
	                    	jButton_sur=null;
	                    	for(int i=1;i<=n;i++){
	                    		jContentPane.remove(str[i]);
	                    		jContentPane.remove(str2[i]);
	                    	}
	                    	jTextField_input.setEditable(true);
	                    	jButton_sure.setText("确认");
	                    	SwingOk.this.initialize();
	                    }else                   	
	                    {                     	
						String number = jTextField_input.getText();
						int i;
						for (i = 0; i < number.length(); i++) {
							if (number.charAt(i) >= '0' && number.charAt(i) <= '9')
								;
							else {
								JOptionPane.showMessageDialog(null, "输入不合法");
								break;
							}
						}
						if (number.length() == 0) {
							JOptionPane.showMessageDialog(null, "不能为空");
						} else if (i >= number.length()) {
							n = Integer.parseInt(number);
							if (n <= 3 || n >= 16)
								JOptionPane.showMessageDialog(null, "输入不合法");
							else {
								jButton_sure.setText("重置");
		                    	jTextField_input.setEditable(false);
								int y = 220;							
								for (i = 1; i <= n; i++) {
									str[i] = new JLabel();
									str2[i] = new JTextField();
									if (i % 2 == 0) {
										str[i].setBounds(new Rectangle(160, y, 40, 24));
										str2[i].setBounds(new Rectangle(237, y, 43, 27));
										y += 50;
									} else {
										str[i].setBounds(new Rectangle(23, y, 40, 24));
										str2[i].setBounds(new Rectangle(87, y, 43, 27));
									}
									str[i].setText("评委" + i);
									str[i].setForeground(Color.green);
									str2[i].setText(String.valueOf(0));
									str2[i].setForeground(Color.blue);
									str2[i].setBackground(Color.lightGray);
									jContentPane.add(str[i], null);
									jContentPane.add(str2[i], null);
								}
								if (n % 2 != 0)
									y += 50;
								jLabel_2 = new JLabel();
								jLabel_2.setText("最终得分：");
								jLabel_2.setForeground(Color.red);
								jLabel_2.setBounds(new Rectangle(23, y, 159, 36));
								jContentPane.add(jLabel_2, null);
								jText = new JTextField();
								jText.setBounds(new Rectangle(100, y, 43, 27));
								jText.setEditable(false);
								jText.setForeground(Color.red);
								jContentPane.add(jText, null);
								jContentPane.add(getJButton_sur(y), null);
								SwingOk.this.setSize(315, 300 + ((n + 1) / 2) * 50);
								SwingOk.this.setVisible(true);
							}
						}
					}
					}
				}

				public void keyTyped(java.awt.event.KeyEvent e) {
				}

				public void keyReleased(java.awt.event.KeyEvent e) {
				}
			});

		}
		return jTextField_input;
	}

	private JButton getJButton_sure() {
		if (jButton_sure == null) {
			jButton_sure = new JButton();
			jButton_sure.setBounds(new Rectangle(52, 131, 75, 27));
			jButton_sure.setText("确定");
			jButton_sure.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
                    if(jButton_sure.getText().equals("重置")){
                    	jContentPane.remove(jLabel_2);
                    	jContentPane.remove(jText);
                    	jContentPane.remove(jButton_sur);
                    	jButton_sur=null;
                    	for(int i=1;i<=n;i++){
                    		jContentPane.remove(str[i]);
                    		jContentPane.remove(str2[i]);
                    	}
                    	jTextField_input.setEditable(true);
                    	jButton_sure.setText("确认");
                    	SwingOk.this.initialize();
                    }else                   	
                    {                     	
					String number = jTextField_input.getText();
					int i;
					for (i = 0; i < number.length(); i++) {
						if (number.charAt(i) >= '0' && number.charAt(i) <= '9')
							;
						else {
							JOptionPane.showMessageDialog(null, "输入不合法");
							break;
						}
					}
					if (number.length() == 0) {
						JOptionPane.showMessageDialog(null, "不能为空");
					} else if (i >= number.length()) {
						n = Integer.parseInt(number);
						if (n <= 3 || n >= 16)
							JOptionPane.showMessageDialog(null, "输入不合法");
						else {
							jButton_sure.setText("重置");
	                    	jTextField_input.setEditable(false);
							int y = 220;							
							for (i = 1; i <= n; i++) {
								str[i] = new JLabel();
								str2[i] = new JTextField();
								if (i % 2 == 0) {
									str[i].setBounds(new Rectangle(160, y, 40, 24));
									str2[i].setBounds(new Rectangle(237, y, 43, 27));
									y += 50;
								} else {
									str[i].setBounds(new Rectangle(23, y, 40, 24));
									str2[i].setBounds(new Rectangle(87, y, 43, 27));
								}
								str[i].setText("评委" + i);
								str[i].setForeground(Color.green);
								str2[i].setText(String.valueOf(0));
								str2[i].setForeground(Color.blue);
								str2[i].setBackground(Color.lightGray);
								jContentPane.add(str[i], null);
								jContentPane.add(str2[i], null);
							}
							if (n % 2 != 0)
								y += 50;
							jLabel_2 = new JLabel();
							jLabel_2.setText("最终得分：");
							jLabel_2.setForeground(Color.red);
							jLabel_2.setBounds(new Rectangle(23, y, 159, 36));
							jContentPane.add(jLabel_2, null);
							jText = new JTextField();
							jText.setBounds(new Rectangle(100, y, 43, 27));
							jText.setEditable(false);
							jText.setForeground(Color.red);
							jContentPane.add(jText, null);
							jContentPane.add(getJButton_sur(y), null);
							SwingOk.this.setSize(315, 300 + ((n + 1) / 2) * 50);
							SwingOk.this.setVisible(true);
						}
					}
				}
				}
			}

			);
		}
		return jButton_sure;
	}

	private JButton getJButton_cancel() {
		if (jButton_cancel == null) {
			jButton_cancel = new JButton();
			jButton_cancel.setBounds(new Rectangle(179, 131, 75, 27));
			jButton_cancel.setText("取消");
			jButton_cancel
					.addActionListener(new java.awt.event.ActionListener() {
						public void actionPerformed(java.awt.event.ActionEvent e) {
							System.exit(0);
						}
					});
		}
		return jButton_cancel;
	}

	private JButton getJButton_sur(int y) {
		if (jButton_sur == null) {
			jButton_sur = new JButton();
			jButton_sur.setBounds(new Rectangle(175, y, 75, 27));
			jButton_sur.setText("确定");
			jButton_sur.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					int i=0;
					try {
						double a[] = new double[n];			
						for (i = 0; i < n; i++) {
							a[i] = Double.parseDouble((str2[i + 1].getText()));
						}
						Arrays.sort(a);
						double sum = 0;
						for (i = 1; i < n - 1; i++)
						{
							sum += a[i];
							System.out.println(a[i]);
						}
						sum = sum / (n - 2);
						System.out.println(sum);
						String s=Double.toString(sum);
						int end=s.indexOf('.')+3>s.length()?s.length():s.indexOf('.')+3;					
						jText.setText(s.substring(0, end));
					} catch (NumberFormatException e1) {				
					JOptionPane.showMessageDialog(null, "第"+(i+1)+"位评委输入有误！","警告",2);					
						return ;
					}				
				}
			});
		}
		return jButton_sur;
	}
	
	public static void main(String[] args) {
		SwingOk frame = new SwingOk();
		Center.centerFrame(frame);
		frame.setVisible(true);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
} 

class Center {
	public static void centerFrame(JFrame frame) {
		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
		Dimension frameSize = frame.getSize();
		if (frameSize.height > screenSize.height) {
			frameSize.height = screenSize.height;
		}
		if (frameSize.width > screenSize.width) {
			frameSize.width = screenSize.width;
		}
		frame.setLocation((screenSize.width - frameSize.width) / 2,
				(screenSize.height - frameSize.height) / 2);
	}
}