更多"import manager"的相关试题:
[简答题]punitive import tariff
[单项选择]
阅读下面Applet程序
import javax. swing. *;
import java. awt. *;
public class SwintgApplet extends JApplet{
JLabel 1=new JLabel("This is a Swing Applet.");
public void init( ){
________________________________
}
}
在程序下画线处填入正确的选项是()
A. Container contentPane=getContenPane(); cotentPan add(1);
B. JPanel comtenPane=new Jpane(); contentPan add(1);
C. contentPan add(1);
D. add(1);
[单项选择]有如下applet代码:
import java.applet.*;
import java.awt.*;
public class MyApplet extends Applet
AA s;
public void int( )
s = new AA("Hello!", "I love JAVA.");
public void paint(Graphics g)
g.drawString(s.toString( ), 30, 50);
class AA
String s1;
String s2;
AA(String str1, String str2)
s1 = str1;
s2 - str2;
public String toString( )
return s1 + s2;
运行后,窗口上将会出现什么,选择一个正确答案______。
A. Hello!
B. B.I love JAV
C. C.Hello! I love JAV
D. 什么都没有
[填空题]将下列的程序补充完整。
import java.applet.Applet;
import java.awt.Graphics;
public class Applet2 extends Applet
public void print(Graphics gap)
int i=678;
gap.drawstring(Integer. ______ (i),20,60);
[填空题]读下列程序
import java.awt.*;
import java.awt.event.*;
publid class MyApplet extends java.applet.Applet
public void init( )
Button b = new Button("Buttonl");
b.addMouseListener(new ClickHandler( ));
add(B) ;
class ClickHandler extends MousAdapter
public void mouseClicked(MouseEvent evt)
______;
在横线处写上语句 【12】 可实现将鼠标当前的水平位置输出到标准输出设备上。
[简答题]
【Java代码】
import javA.awt.*;
import javA.applet;
public class HelloApplet extends (1) {
public void paim( (2) ){
g.drawString(message,10,20);
message="welcome back!”;
}
public void (3) ( ){
message="Welcome!”;
}
private (4) message;
}
【HTML文档】
<html>
<head>
<title>HTML Test HelloApplet Page</title>
</head>
<body>
Test HelloApplet小程序<br>
<applet
codebase="."
code=" (5) "
name="TestApplet"
width="400"
height="300"
>
</applet>
</body>
</html>
[简答题]阅读下列程序,写出程序能。
import java. applet.*;
import java. awt. *;
public class C3602 extends,Applet implements Runnable
Thread myThread=null;
public void start( )
setSize(300,200);
if(myThread==null)myThread=new Thread(this);
myThread. start( );
public void run( )
while(true)
trymyThread. sleep(500);
catch(InterruptedException e)
repaint( );
public void paint(Graphics g)
double i=Math. random( );
if(i<0.33)g.setColor(Color.yellow);
else if(i<0.66)g.setColor(Color. red);
else g.setColor(Color. blue);
int x=(int)(100*i);
g.fillOval(x,x,x,x);
[简答题]阅读下列程序,写出程序功能。
import java.applet.*;
import java. awt.*;
import java. awt. event.*;
public class C3601 extends Applet implements ActionListener
AudioClip clip;
Button buttonPlay,buttonLoop,buttonStop;
public void init( )
clip=getAudioClip(getCodeBase( ),"1.wav");
buttonPlay=new Button("start");
buttonLoop=new Button("loop");
buttonStop=new Button("stop");
buttonPlay. addActionListener(this);
buttonStop.addActionListener(this);
buttonLoop. addActionListener(this);
setSize(300,100);
add(buttonPlay);add(buttonLoop);add(buttonStop);
public void stop( )
clip.stop( );
public void actionPerformed(ActionEvent e)
if(e.get.Source( )==buttonPlay)clip.play( );
else if(e. getSource( )==buttonLoop)clip.loop( );
if(e. getSource( )==buttonStop)clip. stop( );
[简答题]阅读下列程序,写出程序功能 。
import java. awt.*;
import javax. swing.*;
import java. awt. event.*;
public class C3401 implements ActionListener
JFrame frmFrame;
JButton btnUp,btnDown;
public C3401( )
frmFrame=new JFrame("按钮应用");
frmFrame.setLayout(new CridLayout(2,1));
btnUp=new JButton("上");
btnUp.setActionCommand("btnUp");
btnUp. addActionListener(this);
btnDown=new JButton("下");
btnDown.setActionCommand("btnDown");
btnDown.addActionListener(this);
frmFrame.add(btnUp);
frmFrame.add(btnDown);
frmFrame. pack( );
frmFrame.setVisible(true);
public void actionPerformed(ActionEvent e)
String cmd=e.getActionCommand( );
if(cmd.equals("btnDown")
if(btnUp.getBackground( )==Color.BLUE)
btnUp.setBackground(Color.red);
else
btnUp. setBackground(Color.blue);
e
[填空题]
请将下面的Applet程序补充完整。
import java. awt. *;
import java. applet. *;
public class Hi 【12】 {
public void paint(Graphics g){
g. drawString("Hi!", 25, 25);
}
}
[单项选择]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
[简答题]阅读下列程序,写运行结果。
import java. awt.event.*;
import javax. swing.*;
public class C3502 implements MouseMotionListener
JTextField text=new JTextField(30);
C3502( )
JFrame myWin=new JFrame("Ex3502");
myWin. setDefaultCloseOperation(JFrame. EXIT_ON_CLOSE);
myWin. setBounds(100,100,300,100);
myWin. getContentPane( ).add(text,"North");
myWin. addMouseMotionListener(this);
myWin. setVisible(true);
public void mouseDragged(MouseEvent e)
int x=e. getX( ),y=e. getY( );
text. setText("拖支鼠标,鼠标坐标为:"+x+","+y);
public void mouseMoved(MouseEvent e)
int x=e.getX( ),y=e.getY( );
text. setText("移到鼠标,鼠标坐标为:"+x +","+y);
public static void main(String[] args)
new C3502( );
[填空题]有下面的Applet程序段:
import,java.awt.*;
import.java.applet.*;
public class Hello extends Applet{
public void panin(Graphics g){
gdrawString("Hello World!",25,25);
}
}
为了使该Applet 程序段能在浏览器中运行,请将下面的程序段补充完整。
<HTML>
<HEAD>
<TITLE>Hello World</TITLE>
</HEAD>
<APPLET> 【15】 "WIDTH=150 HEIGHT=25"></APPLET>
[单项选择]关于下面程序段的说法,正确的是
import java.applet.*;
import java.awt.*;
public class Test extends Applet
Image img;
public void init( )
img=new Image( );
public void paint(Graphics g)
g.drawImage(img,0,0,this);
A. 该程序段可以正常运行
B. 程序中所创建的Image为空,但可以显示
C. 程序中所创建的Image不为空
D. 程序中所创建的Image为空,不能显示
[单项选择]关于下面程序段的说法,正确的是
import javA.applet.*;
import java.awt,*;
public class Test extends Applet
Image img;
public void init( )
img=new Image( );
public void paint(Graphics g)
g. drawlmage(img,0,0,this);
A. 该程序段可以正常运行
B. 程序中所创建的Image为空,但可以显示
C. 程序中所创建的Image不为空
D. 程序中所创建的Image为空,不能显示
[填空题]下面是一个类的定义,请将程序补充完整。
import java awt.*;
import java applet.*:
public class myprogram extends Applet // 定义小程序的主类
{
Label p1;
TextField in:
publicvoidinit( )
{p1=new Label("请输入一个整数");
_______;
in=new TextField(8);
add(in);
}
}
[简答题]阅读下程序,写出程序功能。
import java. awt.*;
import java. applet.*;
import javax. swing.*;
import java. awt. event. * ;
public class C3402 extends Applet
static JFrame myWin;
static SetBG setbg=new SetBG( );
static JButton button;
public void init( )
myWin=new JFrame("C3402");
myWin. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myWin. setBounds(100,200,300,400);
myWin. setLayout(new FlowLayout( );
Container con=myWin. getContentPane( );
con. setBackground(Color. red);
button=new JButton("OK");
button. addActionListener(setbg);
myWin.add(button);
myWin.setVisible(true);
class SetBG implements ActionListener
public void actionPerformed(ActionEvent e)
Container con=C3402. myWin. getContentPane( );
if(con. getBackground( )==Color. red)
con. setBackground(Color. green);