A.Because he can earn much money to support his family.
B.Because his wife agrees with his present working way.
C.Because his present work is creative.
D.Because his work is useful to the people and the community.
第1题
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(); cotentPane. add(1);
B.JPanel comtenPane=new Jpane(); contentPane. add(1);
C.contentPane. add(1);
D.add(1);
第2题
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(); cotentPane. add(1);
B.JPanel comtenPane=new Jpane(); contentPane. add(1);
C.contentPane. add(1);
D.add(1);
第3题
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");
第4题
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);
第5题
下列程序将类C15的对象写入文件filetxt,选择正确的语句填入下列程序的横线处。 package ch2; import java.util.*; import java.io.*; class C15______ { public iht a; public void setInt(int newa) { a = newa; } } public class Testl5 { pulibc static void main(String[] args) { C15 bj = new C15(); try { FileOutputStream fos =newFileOutputStream("ch2\\filel5.txt"); ObjectOutputStream os = ObjectOutputStream(fos); Obj.setInt(10); oos.writeObject(obj); oos.close (); fos.close(); } catch(IOException ioe) { ioe.printStackTrace(); } } }
A.implements Runnable
B.implements Sedalizable
C.extends Serializable
D.implements InputStream
第6题
下列程序实现对ZIP文件file.zip的检索,在横线处填入正确的语句 package test; import java.io.*; import java.util.*; import java.util.zip.*; public class Exam { public static void main(String[] args){ try{ FileInputStream fis=new FileInputStream("test/file.zip"); ZipInputStream zis=new ZipInputStream(fis); ZipEntry en; while((______)!=null){ en.getName(); zis.closeEntry(); } zis.close(); } catch(Exception e){ e.printStackTrace(); } } }
A.en=zis.getNextEntry()
B.en==zis.getNextEntry()
C.en=zis.getEntry()
D.zis.getNextEntry()
第7题
下列程序实现对ZIP文件filel4.zip的检索,在横线处填入正确的语句。 package ch1; import java.io.*; import java.util.*; import java.util.zip.*; public class exl4 { publio static void main(String[] args} { try { FileInputStream fis = new FileInputStream("chl/filel4.zip"); ZipInputStream zis = new zipInputStream(fis); ZipEntry en; while((______) ! = null) { en.getName(); zis.clcseEntry(); } zis.close(); } catch(Exception e) { e.printStackTrace(); } } }
A.en = zis.getNexTEnTRY()
B.en = zis.getEntry()
C.en=zis.getNextEntry()
D.zis.getNextEntry()
第8题
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);
第9题
下列程序实现对ZIP文件file.zip的检索,在横线处填入正确的语句 package test; import java.io.*: import java.util.*; import java.util.zip.*; public class Exam { public static void main(String[])args){ try{ FileInputStream fis=new FileInputStream("test/file.zip"); ZipInputStreamzis=new ZipInputStream(fis); ZipEntry en; while ((_____)!=null){ en.getName(); zis.closeEntry(); } zis.close(); } catch(Exception e) { e.printStackTrace(); } } }
A.en = zis.getNextEntry()
B.en = zis.getNextEntry()
C.en = zis.getEntry()
D.zis.getNextEntry()
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