📄 exam01_daan2.htm
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<html><head><title>Untitled Document</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><link rel="stylesheet" href="../../css/text.css" type="text/css"></head><body bgcolor="#FFFFFF" text="#000000" style="overflow-x:hidden"><center> <table width="90%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class=text> <p><b>四、 编程题答案</b></p> <p>编程第1题<br> import java.io.*;</p> <p> public class Point<br> {<br> int x,y;<br> <br> public Point(int x,int y)<br> {<br> this.x = x;<br> this.y = y;<br> }<br> <br> public Point getPoint()<br> {<br> Point tempPoint = new Point(x,y);<br> return tempPoint;<br> }<br> <br> public void setPoint(Point point)<br> {<br> this.x = point.x;<br> this.y = point.y;<br> }<br> <br> <br> public static void main(String args[])<br> {<br> Point Point1 = new Point(3,4);<br> System.out.println("Point1:"+"("+Point1.x+","+Point1.y+")");<br> <br> Point Point2 = Point1.getPoint();<br> System.out.println("Point2:"+"("+Point2.x+","+Point2.y+")");<br> <br> Point Point3 = new Point(5,6);<br> Point1.setPoint(Point3);<br> System.out.println("Point1:"+"("+Point1.x+","+Point1.y+")");<br> } <br> <br> }<br> </p> <p><br> 编程第2题<br> import java.io.*;</p> <p> class FileCopy<br> {<br> public static void main(String[] args)<br> {<br> FileInputStream in;<br> FileOutputStream out;<br> <br> if (args.length<2)<br> {<br> System.out.println("Usage: java copy srcfile destfile");<br> System.exit(-1);<br> } <br> <br> try <br> {<br> in = new FileInputStream(args[0]);<br> out = new FileOutputStream(args[1]);<br> copyFile(in,out);<br> <br> }<br> <br> catch (Exception e)<br> {<br> System.out.println(e);<br> }<br> <br> }</p> <p> private static void copyFile(FileInputStream in, FileOutputStream out)<br> {<br> int length;<br> byte buf[] = new byte[1024];<br> <br> try{<br> while ((length=in.read(buf,0,1024))!=-1)<br> {<br> out.write(buf, 0, length);<br> }<br> <br> } <br> <br> catch (Exception e)<br> {<br> System.out.println("Error:"+e);<br> System.exit(-1);<br> }<br> }<br> <br> }<br> </p> <p><br> 编程第3题<br> import java.awt.*;<br> import java.awt.event.*;<br> import java.applet.*;<br> import java.util.*;</p> <p> public class TimeViewer extends Applet implements ActionListener, Runnable {<br> <br> Thread timer;<br> TextField in, out;<br> Button bb;<br> Panel p1, p2, p3;<br> boolean state;<br> <br> public void init() { <br> in = new TextField(20); <br> out = new TextField(20);<br> bb = new Button("Current Time:");<br> p1 = new Panel();<br> p2 = new Panel();<br> p3 = new Panel();<br> <br> setLayout(new GridLayout(3, 1));<br> setSize(200,100);<br> <br> p1.add(in);<br> p2.add(bb);<br> p3.add(out);<br> add(p1);<br> add(p2);<br> add(p3);<br> <br> bb.addActionListener(this); <br> <br> timer = new Thread(this);<br> state = true;<br> timer.start(); <br> }<br> <br> public void actionPerformed(ActionEvent e) {<br> //out.setText(in.getText());<br> out.setText(currentTime()); <br> }<br> <br> public void run() {<br> while(true) {<br> try { <br> timer.sleep(1000); <br> } catch (InterruptedException e) { }<br> in.setText(currentTime());;<br> }<br> }<br> <br> String currentTime() {<br> Date now = new Date();<br> String str = now.getHours() + ":" + now.getMinutes() + ":" + now.getSeconds();<br> return str;<br> }<br> }</p> </td> </tr></table> </center></body></html>⌨️ 快捷键说明
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