更多"[单选题]以下代码是为运行带别名myservlet 的servlet用"的相关试题:
[单选题]以下代码是为运行带别名myservlet 的servlet用的:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Hello extends HttpServlet{
public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
res.setContentType(“text/html”);
PrintWriter out = res.getWriter();
out.println(“”);
System.out.println(“Welcome”);
out.println(“”);
}
}
当你调用此servlet 时,其输出将是什么?
A.将显示带有文本Welcome的页面
B.将是一个异常
C.将没有任何输出
D.将显示空白页面
[单选题]下面代码中的内部类名是:
import java.awt*;
import javax.swing.*;
class TalkingClock {
public static void main(int interval,final boolean beep) {
ActionListener listener = new ActionListener(){
public void actionPerformed(ActionEvent event){
............
}
}
Timer t = new Timer(interval,listener);
t.start();
}
}
A.Timer
B.ActionListener
C.listener
D.匿名
[单选题]下列代码的下划线处应填入的方法名是:
import java.applet.*;
import java.awt.*;
public class Hello extends Applet {
public void _____(Graphics g){
g.drawString("How are you!", 10, 10);
}
}
A.repaint
B.println
C.paint
D.show
[单选题]在下列程序的空白处,应填入的正确选项是:
import java.io.*;
pulilc class ObjectStreamTest{
publilc static void main(string args[]) throws IOException{
ObjectOutputStream oos= new ObjectOutputStream (new FileOutputStream("serial.bin"));
java.util.Date d= new Java.util.Date();
oos. ______ (d);
ObjectInputStream ois= new ObjectInputStream(new FileOutputStream("serial.bin"));
try{
java.util.date restoredDate = (java.util.Date) ois.readObject();
System.out.println ("read object back from serial.bin file:" + restoredDate);
}catch (ClassNotFoundException cnf) {
System.out.println ("class not found");
}
}
}
A.WriterObject
B.Writer
C.BufferedWriter
D.writeObject
[单选题]在下列程序的空白处,应填入的正确选项是:
import java.io.*;
public class writeInt{
public static void main(string[] a) {
int[ ] myArray = {10,20,30,40};
try{
DataOutputSystem dos= new DataOutputSystem(new FileOutputSystem("ints.dat"));
for(int i=0;iA.start( )
B.close( )
C.read( )
D.write( )
[单选题]在JavaScript中,有以下代码
想要显示浏览器安装了哪些插件,横线处需要补充代码()
A.cpuClass
B.plugins
C.platform
D.onLine
[单选题]Java虚拟机(JVM)运行Java代码时,不会进行的操作是:
A.加载代码
B.校验代码
C.编译代码
D.执行代码
[单选题]下列哪个选项的java源文件代码片段是不正确的?
A.package testpackage;
public class Test{ }
B.import java.io.*;
package testpackage;
public class Test{ }
C.import java.io.*;
class Person{ }
public class Test{ }
D.import java.io.*;
import java.awt.*;
public class Test{ }
[单选题]在JavaScript中,判断客户端时移动端还是PC端,需要在以下代码横线处补充的代码是()
A.userAgent
B.appVersion
C.cpuClass
D.appName
[单选题]以下代码执行结果是哪一项?
A.3.14
0
0
NaN
B.3.14
NaN
0
9988
C.3.14
0
NaN
NaN
D.3.14
0
0
9988
[单选题] JAVA最初是由以下哪家公司开发推出的程序设计语言
A.sun
B.google
C.microsoft
D.apple
[单选题]在JavaScript中,要获取浏览器的代号,以下代码正确的是()
A.navigator.appName
B.navigator.appCodeName
C.navigator.appMinorVersion
D.navigator.appVersion
[单选题]关于正则表达式声明 6 位数字的邮编,以下代码正确的是( )
A.var reg = /\d6/;
B.var reg = \d{6}\;
C.var reg = /\d{6}/;
D.var reg = new RegExp(“\d,6-”);
[单选题]使用 JavaScript 向网页中输出 hello,以下代码中可行的是( )
A.document.write(hello);
B.document.write(“hello”);
C.hello
D.document.read(“hello”);
[单选题]以下代码:
的输出结果是?
A.名称是:null
B.名称是:Hello World
C.无任何输出
D.名称是:Hello World null
[单选题]声明一个对象,给它加上 name 属性和 show 方法显示其 name 值,以下代码中正确的是()
A.var obj = [name:"zhangsan",show:function(){alert(name);}];
B.var obj = ,name:"zhangsan",show:”alert(this.name)”-;
C.var obj = {name:"zhangsan",show:function(){alert(name);}};
D.var obj = {name:"zhangsan",show:function(){alert(this.name);}};
[单选题]有以下代码:
最终提示框中显示信息为()
A.30
B.10+20
C.undefined
D.1020