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<html><head><title>Java期末考试题</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><link rel="stylesheet" href="css/text.css" type="text/css"><script language="JavaScript"><!--function MM_openBrWindow(theURL,winName,features) { //v2.0 window.open(theURL,winName,features);}//--></script></head><script language="JavaScript">function getresultcheck(form){var mykeys=new Array();// mykeys[0]="B";mykeys[0]="C";mykeys[1]="D";mykeys[2]="D";mykeys[3]="C";mykeys[4]="B";mykeys[5]="B";mykeys[6]="C";mykeys[7]="D";mykeys[8]="A";mykeys[9]="A";mykeys[10]="B";mykeys[11]="B";//czp-select-answervar answer=new Array();for(var I=0;I<mykeys.length;I++) answer[I]="";var every=form.elements;<!--czp-select-count-->for(var I=0;I<every.length;I++){ if(every[I].type=="radio") { if(every[I].checked) { var item=parseInt(every[I].name.substr(0)); answer[item-1]+=every[I].value; } } }var newcount="<html><head><title>谢谢您!</title></head><body><center><h2><font color=red>您的测试结果</font></h2></center>";var totalscore=0;for(var I=0;I<answer.length;I++){ if(answer[I]==mykeys[I]) { var rstr="<font size=2>第"+(I+1)+"题答案正确!</font><br>"; newcount+=rstr; totalscore+=1/(answer.length)*100;//每题分数 }else { var rstr="<font size=2>第"+(I+1)+"题答案错误!正确答案为"+mykeys[I]+"</font><br>"; newcount+=rstr; }}newcount+="<br>您的总成绩为:";newcount+=Math.ceil(totalscore);newcount+="分";newwin=window.open("","","height=200,width=300,scrollbars=yes,resizable=no");newwin.document.write(newcount);}function getresultcheck1(form){var mykeys=new Array();// mykeys[0]="B";mykeys[0]="AB";mykeys[1]="BD";mykeys[2]="ADE";mykeys[3]="AD";mykeys[4]="BCD";mykeys[5]="AB";mykeys[6]="ABCD";mykeys[7]="ABCD";mykeys[8]="BC";mykeys[9]="BC";mykeys[10]="AC";//czp-mulselect-answervar answer=new Array();for(var I=0;I<mykeys.length;I++) answer[I]="";var every=form.elements;<!--czp-mulselect-count-->for(var I=0;I<every.length;I++){ if(every[I].type=="checkbox") { if(every[I].checked) { var item=parseInt(every[I].name.substr(0)); answer[item-1]+=every[I].value; } } }var newcount="<html><head><title>谢谢您!</title></head><body><center><h2><font color=red>您的测试结果</font></h2></center>";var totalscore=0;for(var I=0;I<answer.length;I++){ if(answer[I]==mykeys[I]) { var rstr="<font size=2>第"+(I+1)+"题答案正确!</font><br>"; newcount+=rstr; totalscore+=1/(answer.length)*100;//每题分数 }else { var rstr="<font size=2>第"+(I+1)+"题答案错误!正确答案为"+mykeys[I]+"</font><br>"; newcount+=rstr; }}newcount+="<br>您的总成绩为:";newcount+=Math.ceil(totalscore);newcount+="分";newwin=window.open("","","height=200,width=300,scrollbars=yes,resizable=no");newwin.document.write(newcount);}function check(){var mykeys=new Array();mykeys[0]="protected";mykeys[1]="default";mykeys[2]="public";mykeys[3]="Object";mykeys[4]="java.lang.Character";mykeys[5]="java.lang.Boolean";mykeys[6]="What a pleasure！I am TomHow do you do？";mykeys[7]="this（a）";mykeys[8]="public class MyFrame extends Frame implements Runnable";//czp-tiankong-answer//mykeys[0]="B";var answer=new Array();for(var I=0;I<mykeys.length;I++) answer[I]="";var every=zfl.elements;for(var I=0;I<every.length;I++){if(every[I].type=="text"){ if(every[I].value!==null) { //var item=parseInt(every[I].name.substr(1))// answer[item-1]+=every[I].value; answer[I]+=every[I].value; } }}var newcount="<html><head><title>谢谢您!</title></head><body><center><h2><font face=\"隶书\" size=\"5\" color=\"#000099\">您的测试结果</font></h2></center>";var totalscore=0;for(var i=0;i<answer.length;i++){ if(answer[i]==mykeys[i]) { var rstr="<font face=\"宋体\" size=2>第"+(i+1)+"个空答案正确!</font><br>"; newcount+=rstr; totalscore+=1/(answer.length)*100; }else { var rstr="<font face=\"宋体\" size=2>第"+(i+1)+"个空答案错误!正确答案为"+mykeys[i]+"</font><br>"; newcount+=rstr; }}newcount+="<br><font face=\"宋体\" size=3><b>您的总成绩为:</b></font><font face=\"宋体\" size=3 color=red>";newcount+=Math.ceil(totalscore);newcount+="分</font><br>";newwin=window.open("","","height=400,width=400,scrollbars=yes,resizable=no");newwin.document.write(newcount);}</script><body bgcolor="#FFFFFF" text="#000000" topmargin=0><center> <br> <b>Java试题（三）</b><br> <br> <table width="95%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class=text valign="top"> <form> <p><b>一、 选择</b><br> <br> 1.给定下面的代码片段： <br> 1) String str = null; <br> 2) if ((str != null) && (str.length() > 10)) { <br> 3) System.out.println("more than 10"); <br> 4) } <br> 5) else if ((str != null) & (str.length() < 5)) { <br> 6) System.out.println("less than 5"); <br> 7) } <br> 8) else { System.out.println("end"); } <br> 哪些行会导致错误？ <p><input type="radio" name="1" value="A"> A line 1<p><input type="radio" name="1" value="B"> B line 2<p><input type="radio" name="1" value="C"> C line 5<p><input type="radio" name="1" value="D"> D line 8<br> <br> 2.下面哪种注释方法能够支持javadoc命令: <p><input type="radio" name="2" value="A"> A /**...**/<p><input type="radio" name="2" value="B"> B /*...*/<p><input type="radio" name="2" value="C"> C // <p> <input type="radio" name="2" value="D"> D /**...*/ <br> <br> 3. 欲编写如下图的一个界面，用于显示用户指定的图像: 如果在区域A中只能放置一个AWT组件，从各组件的本来功能角度考虑，最好使用哪种组件：<br> <img src="images/pic/t3_1.jpg" width="374" height="203"><br> <p><input type="radio" name="3" value="A"> A TextArea<p><input type="radio" name="3" value="B"> B Panel<p><input type="radio" name="3" value="C"> C Applet <p> <input type="radio" name="3" value="D"> D Canvas <br> <br> 4. 界面如上题所示。若"Button1"的功能是：点击后弹出一个用于输入的界面，获取用户想要显示的图像文件名，则该界面最好是（从编程简单和程序不易出错的角度考虑）： <br> <input type="radio" name="4" value="A"> A 模式（Modal）Dialog <br> <input type="radio" name="4" value="B"> B 非模式（None-modal）Dialog <br> <input type="radio" name="4" value="C"> C FileDialog <br> <input type="radio" name="4" value="D"> D Frame <br> <br> 5. 界面如上题所示。如果在A区域使用某种AWT组件（java.awt.Component的子类）来负责绘制图像,则绘图的语句最好应放在该组件的哪个方法中(考虑到应用程序和Java虚拟机的AWT线程都会要求重画该组件)? <p><input type="radio" name="5" value="A"> A 构造方法<p><input type="radio" name="5" value="B"> B paint（Graphics g）<p><input type="radio" name="5" value="C"> C update（Graphics g）<p><input type="radio" name="5" value="D"> D repaint（）<br> <br> 6.下面关于Applet的说法正确的是 <p><input type="radio" name="6" value="A"> A Applet也需要main方法 <p> <input type="radio" name="6" value="B"> B Applet必须继承自java.awt.Applet <p><input type="radio" name="6" value="C"> C Applet能访问本地文件 <p> <input type="radio" name="6" value="D"> D Applet程序不需要编译 <br> <br> 7.看下面一段程序： <br> class Aclass{ <br> void go(){ <br> System.out.println("Aclass");<br> } <br> } <br> public class Bclass extends Aclass{ <br> void go{ <br> System.out.println("Bclass"); <br> } <br> public static void main(String args[]){ <br> Aclass a=new Aclass(); <br> Aclass a1=new Bclass(); <br> a.go(); <br> a1.go(); <br> } <br> 以上程序运行结果是： <p> <input type="radio" name="7" value="A"> A Aclass <br> Aclass <p> <input type="radio" name="7" value="B"> B Bclass <br> Bclass <p> <input type="radio" name="7" value="C"> C Aclass <br> Bclass <p> <input type="radio" name="7" value="D"> D Bclass <br> Aclass <br> <br> 8.下列关于Java线程的说法那些是正确的（） <p><input type="radio" name="8" value="A"> A 每一个Java线程可以看成由代码、一个真实的CPU以及数据三部份组成。<p><input type="radio" name="8" value="B"> B 创建线程的两种方法中，从Thread类中继承的创建方式可以防止出现多父类问题。 <p> <input type="radio" name="8" value="C"> C Thread类属于java.util程序包。 <p> <input type="radio" name="8" value="D"> D 以上说法无一正确。 <br> <br> 9.看以下程序： <br> boolean a=false; <br> boolean b=true; <br> boolean c=(a&&b)&&(!b)； <br> int result=c==false?1:2; <br> 这段程序执行完后，c与result的值是： <p><input type="radio" name="9" value="A"> A c=false;result=1;<p><input type="radio" name="9" value="B"> B c=true;result=2;<p><input type="radio" name="9" value="C"> C c=true;result=1; <p> <input type="radio" name="9" value="D"> D c=false;result=2; <br> <br> 10.运行下列程序, 会产生什么结果 <br> public class X extends Thread implements Runable{ <br> public void run(){ <br> System.out.println("this is run()"); <br> } <br> public static void main(String args[]) <br> { <br> Thread t=new Thread(new X()); <br> t.start(); <br> } <br> } <p><input type="radio" name="10" value="A"> A 第一行会产生编译错误<p><input type="radio" name="10" value="B"> B 第六行会产生编译错误<p><input type="radio" name="10" value="C"> C 第六行会产生运行错误 <p> <input type="radio" name="10" value="D"> D 程序会运行和启动 <br> <br> 11.指出下列程序的运行结果 <br> int i = 9; <br> switch (i) { <br> default: <br> System.out.println("default"); <br> case 0: <br> System.out.println("zero"); <br>⌨️ 快捷键说明
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