import?javax.swing.Jframe;
import?javax.swing.JPanel;
import?javax.swing.JButton;
import?java.awt.*;
import?java.awt.event.ActionEvent;
import?java.awt.event.ActionListener;

public?class?Elevator?extends?JPanel?{

????private?JButton?b[]?=?new?JButton[8];
????static?int?thisfloor?=?0;
????private?int?a[]?=?{0?0?0?0?0?0?0?0};
????int?x2?=?0?x1?=?460;

????public?Elevator（）?{
????????setPreferredSize（new?Dimension（360?650））;
????????setBackground（new?Color（255?218?152））;
????????setLayout（null）;
????????this.add（getPanel（））;
????????new?Thr（）;
????}

????public?JPanel?getPanel（）?{
????????JPanel?p?=?new?JPanel（）;
????????p.setBounds（210?300?100?200）;
????????p.setLayout（new?GridLayout（4?2））;
????????for?（int?i?=?0;?i?????????????b[i]?=?new?JButton（）;
????????????b[i].setBackground（new?Color（204?255?204））;
????????????b[i].setText（String.valueOf（i?+?1））;
????????????final?int?j?=?i;
????????????b[i].addActionListener（new?ActionListener（）?{

????????????????public?void?actionPerformed（ActionEvent?e）?{
????????????????????b[j].setBackground（new?Color（255?204?204））;
????????????????????a[j]?=?1;
????????????????}
????????????}）;
????????}
????????for?（int?i?=?7;?i?>=?0;?i--）?{
????????????p.add（b[i]）;
????????}
????????return?p;
????}

????public?void?openDoor（）?{
????????x2?=?x2?+?10;
????????repaint（）;
????}

????public?void?closeDoor（）?{
????????x2?=?x2?-?10;
????????repaint（）;
????}

????@Override
????protected?void?paintComponent（Graphics?g）?{
????????super.paintComponent（g）;
????????Graphics2D?g2?=?（Graphics2D）?g;
????????g2.setColor（Color.green）;
????????g2.drawLine（70?500?150?500）;
????????g2.drawLine（70?450?150?450）;
????????g2.drawLine（70?400?150?400）;
????????g2.drawLine（70?350?150?350）;
????????g2.drawLine（70?300?150?300）;
????????g2.drawLine（70?250?150?250）;
????????g2.drawLine（70?200?150?200）;
????????g2.drawLine（70?150?150?150）;
????????g2.drawLine（70?100?150?100）;
????????g2.drawLine（70?100?70?500）;
????????g2.drawLine（150?100?150?500）;
????????g2.setColor（Color.black）;
????????g2.drawString（“1?F“?20?500）;
????????g2.drawString（“2?F“?20?450）;
????????g2.drawString（“3?F“?20?400）;
????????g2.drawString（“4?F“?20?350）;
????????g2.drawString（“5?F“?20?300）;
????????g2.drawString（“6?F“?20?250）;
????????g2.drawString（“7?F“?20?200）;
????????g2.drawString（“8?F“?20?150）;
????????g2.setColor（new?Color（153?153?255））;
????????g2.fillRect（90?-?x2?x1?20?40）;
????????g2.fillRect（110?+?x2?x1?20?40）;
????}

????class?Thr?{

????????public?Thr（）?{
????????????thisthread?t?=?new?thisthread（）;
????????????t.start（）;
????????}
????}

????class?thisthread?extends?Thread?{

????????@Override
????????public?void?run（）?{
????????????while?（true）?{
????????????????execute（）;
????????????????try?{
????????????????????Thread.sleep（500）;
????????????????}?catch?（InterruptedExcep