更多"在下画线处填入代码,使程序正常运行并且输出“Hello!”。 cla"的相关试题:
[填空题]请在下画线处填入代码,使程序正常运行并且输出“Hello!”
class Test______
public static void main(string[]args)
Test t=new Test( );
t.start( );
Public void run( )
System.out.println(’Hello!’);
[填空题]下面程序构造了一个Swing Applet,在下画线处填入正确的代码。
import javax.swing.*;
import java.awt.*;
public class SwingApplet extends ______
JLabel 1=new JLabel("This is a Swing Applet.");
public void init( )
Container contentPane=getContentPane( );
contentPane.add(1);
[填空题]下列程序构造了一个Swing Applet,请在下画线处填入正确的代码:
import javax.swing.*;
importt java.awt.*;
public class SwingApplet extends______
JLabel 1=new JLabel(’This is a Swing Applet.’);
public void init( )
Container eontentPane=getContentPane( );
contentPane.add(1);
[填空题]在下面Java Applet程序的下画线处填入代码,使程序完整并能够正确运行。
import java.applet.*;
import java.awt.*;
public class HelloWorld ______ {
public void paint(Graphics g) {
g.drawString("Hello World!",25,25);
}
}
[填空题]在下列Java Applet程序的下画线处填入代码,使程序完整并能够正确运行。
import java.applet.*;
import java.awt.*;
public class HelloWorld______
public void paint(Graphics g)
g.drawString("Hello World!",25,25);
[填空题]在下面Java Applet程序的下画线处填入代码,使程序完整并能够正确运行。
import java.applet.*;
import java.awt.*;
public class HelloWorld ______
public void paint(Graphics g)
g.drawString("Hello World!",25,25);
[单项选择]在下面程序的下画线处应填入的选项是
public class Test______
public static void main(String args[])
Test t=new Test( );
Thread tt=new Thread(t);
tt.start( );
public void run( )
for(int i=0;i<5;i++) System.out.println("i="+i);
A. implements Runnable
B. extends Thread
C. implements Thread
D. extends Runnable
[单项选择]在下面程序的下画线处应填入的选项是 public class Test______{ public static void main(String args[]) { Test t=new Test( ); Thread tt=new Thread(t); tt.start( ); } public void run( ) { for(int i=0;i<5;i++) System.out.println("i="+i); } }
A. implements Runnable
B. extends Thread
C. implements Thread
D. extends Runnable
[单项选择]在程序的下画线处应填入的选项是( )。
public class Test______
public static void main(String args[])
Test t=new Test( );
Thread tt=new Thread(t);
tt.start( );
public void run( )
for(int i=0;i<5;i++)
System.out.println("i="+i);
A. implements Runnable
B. extends Thread
C. implements Thread
D. extends Runnable
[单项选择]下面程序的功能是将一个整数数组写入二进制文件。在下画线处应填入的选项是 import java.io.*; public class XieShuzu { public static void main(String[] a) { int[]myArray={10,20,30,40}; try { DataoutputStream dos=new DataOutputStream(new FileoutputStream("ints.dat")); for(int i=0;i<myArray.1ength;i++)dos.______(myArray[i]); dos.close( ); System.out.println("已经将整数数组写入二进制文件:ints.dat"); } catch(IOException ice) { System.out.println("IO Exception"); } } }
A. writeArray
B. writeByte
C. writeInt
D. writeDouble
[单项选择]下列程序中画线处应填入的语句是
classBase
public:
voidfun( )COUt<<"Baseoffun"<<endl;
;
classDerived:publicBase
voidfun( )
_______//显示基类的成员函数fun
cout<<"Derivedoffun"<<endl;
;
A. fun( );
B. Base.fun( );
C. Base::fun( );
D. Base->fun( );
[填空题]有如下代码片段,请在画线处填入正确的代码,使程序运行正确。
import javax.swing.*;
import java.awt.*;
import java.event.*;
public class JAppletTest extends 【12】 {
public void init( )
{
Container contentPane = getContentPane( );
Icon icon = new ImageIcon("swing.gif", "A GIF on a swing");
JLabel label = new JLabel("Swing!", icon, Swingconstants. CENTER);
contentPane.add(label, BorderLayout. CENTER);
}
}
[单项选择]下列程序中下画线处应填入的语句是
class Base
{
public:
void fun( ) {cout < < "Baseoffun" < < endl;}
};
class Derived:public Base
{
void fun( )
{
______//显示基类的成员函数fun
cout < < "Derived of fun" < < endl;
}
};
A) fun( ) ; B) Base. fun( ) ;
C) Base: :fun( ) ; D) Base->fun( ) ;
[单项选择]下列程序中下画线处应填入的语句是
class Base
public:
void fun( ) cout < < "Baseoffun" < < endl;
;
class Derived:public Base
void fun( )
______//显示基类的成员函数fun
cout < < "Derived of fun" < < endl;
;
A) fun( ) ; B) Base. fun( ) ;
C) Base: :fun( ) ; D) Base->fun( ) ;