I was ______ by their kindness and moved to tears.A．preoccupiedB．embarrassedC．overwhelmedD

选择正确的语句填入下列程序的横线处。 import java．awt．*； import java.awt.event.*; public class ex21 { static Frame. f; static FileDialog fd; public static void main(String[] args) { f = new Frame("ex21"); ______ fd. setVisible (true); System.out.println (fd.getFile ()); } }

A．new FileDialog(f, "FileDialog");

B．new FileDialog("FileDialog");

C．fd = new FileDialog(f, "FileDialog");

D．fd = new FileDialog("FileDialog");

下列程序构造了一个SwingApplet，请在下划线处填入正确的代码：

import javax.swing0*；

impon java.awt.*；

public class SwingAppletextends______{

JLabell=newJLabel("ThisisaSwingApplet.")；

publicvoidinit(){

ContainercontentPane=getContentPane()；

contentPane.add(1)；

}

}

下列程序构造了一个 Swing Applet ，请在下划线处填入正确的代码

Import javax.swing.*;

Import java.awt.*;

Public class SwingApplet extends 【 13 】 {

Jlabel l = new Jlabel (“ This is a Swing Applet. ” );

Public void init(){

Container contentPane = getContentPane();

contentPane.add(1);

}

}

下列Applet在坐标(30，50)处以黄色字体显示“你好!”。请选择正确的语句填入横线处。 import java.awt.*; import java.applet.*; public class ex27 extends Applet { public void paint＜Graphics g) { g.drawString("你好", 30, 50); } }

A．setColor(Color.yellow);

B．g.setColor(Color. Yellow),

C．g.setFontColor(Color. yellow);

D．g.setColor(Color. yellow);

请选择正确的语句填入下列程序的横线处。 import javax. Swing.*; import java.awt.*; import java.awt.event.*; public class ex46 { static String str= "单击次数:"; static intcnt = 0; public static void main(String[] args) { try{ UIManager.setLookAndFeel(UIManager. getCrossPlatformLookAndFeelClassName()); } catch(Exception e) {} JFrame. jf = new JFame("ex46"); JButton jb = new JButton("Button"); jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { cnt ++; j1.setText(str +cnt); } }); j1. setLabelFor (jb); jPanel jp = new JPanel(); jp.setBorder(BorderFactory.createEmptyBorder(25, 25, 25, 25); jp.setLayout(new GridLayout(0, 1)); jp.add(jb); jp.add (j1); jf.getContenPanel() .add(jp, "Center"); jf.pack(); jf.setVisible (true); } }

A．Labelj1 = new JLabel(str + "0");

B．final JLabel j1 = new JLabel(str + "0");

C．final JLabelj1 = JLabel(str + "0");

D．JLabelj1 = new JLabel(str + "0");

port java.awt.*; Import java.applet.*; Public class HelloApplet extends { Public void paint(Graphics g) { ______ ("hello world!",20,20); } }

下列Applet用于显示提供它的主机的IP地址。请选择正确的语句填入横线处。 import java.awt.*; import java. awt. event.*; import java.applet.Applet; import java.net. *; public class ex23 extends Applet { public void init() { setLayout(new GridLayout(2, 1); Button btm = new Button("显示IP"); final Label 1 = new Label(" "); btn. addActionListener (new ActionListener () { public void actionPerformed(ActionEvent ae) { try { URL ur1 = getCodeBase(); String strName = ur1.getHost(); ______ 1.setText (ia.toString()); } catch (Exception e) { e.printStackTrace (); } } }); add (btn); } }

A．InetAddress ia = URL.getByName(strName);

B．InetAddress ia = InetAddress.getByName(strName);

C．InetAddress ia = new InetAddress.getByName(strName);

D．InetAddress ia = InetAddress.getByName(ur1);

在下列程序横线处填入设置窗口大小的语句，窗口长200，宽100，请选择正确的一项______。 import java.awt.*; public class ex34 extends Frame { public static void main(String[] args) { ex34 e = new ex34(); ______ e. setVisible (true); } }

A．setSize(200, 100);

B．e.setSize(200, 100);

C．setSize(100, 200);

D．e.setSize(100, 200);

请选择正确的语句填入下列程序的横线处。 import java.awt.*; public class ex40 { static Frame. f; public static void main(String[] args) { f = new Frame("ex40"); MenuBar mb = new MenuBar(); f.setMenuBar (mb); Menu m1 = new Menu("menu"); ______ m1.add (mil); mb. add (m1); f. setSize (200, 200); f. setVisible (true); } }

A．Menu mil = new MenuItem("iteml");

B．MenuItem mil = new MenuItem("iteml");

C．Menu mil = new MenuItem("iteml");

D．Menu mil = MenuItem("iteml");

下列Applet在坐标(20,20)处显示一幅GIF图像，请填写正确的程序在横线处。 import java.awt.*; import java.applet.*; import java.net.URL; public class Testl3 extends Applet { Image i; public void init() { URL url=getDocumentBase(); String name="IMG nClick=over(this) title=放大0, gif"; 【 】; } public void paint(Graphics g) { g.drawImage(i,20,20,this); } }