以下命令中对已经打开的索引文件进行查找的命令为()。
A:SEEK B:FOUND C:CONTI D:SORT
“guAngdong-Conti”原产于哪个国家?()
A:冰岛 B:法国 C:中国 D:意大利
RoaldDahl,在MyUncleOawald一书中写到“品尝这款葡萄酒让嘴和鼻子同时达到了快感和高潮。这款葡萄酒指的是:()
A:罗曼尼康帝(Romanee-Conti) B:依肯(Chateaud’Yquem) C:玛歌(ChateauMargaux)
下面程序是一个计时器,从1000秒开始倒计时,直到为0结束。在界面上有两个按钮,一个可以暂停计时,另一个可以继续已经暂停的计时。请更正题中带下划线的部分。
注意:不改动程序的结构,不得增行或删行
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class Example3_4 extends Applet
public Color color = Color.red;
private int num= 1000;
public Counter theCounter;
private Button stop;
private Button start;
public void init( )
stop = new Button("暂停");
start = new Button ("继续");
theCounter = new Counter(this);
stop.addActionListener(new Lst( ) implements ActionListener
public void actionPerformed(ActionEvent e)
theCounter.sus( );
);
start.addActionListener(new SuspenListener( ));
add(start);
add(stop);
theCounter.start( );
public void paint(Graphics g)
g.setCotor(color);
g.drawString(String.valueOf(num),50,50);
public void setInt(int i)
num=i;
class SuspenListener implements ActionListener
public void actionPerformed(ActionEvent e)
theCounter.conti ( );
public class Counter extends Thread
Example3_4 example;
boolean isHold;
Counter (Example3_4 ex)
this.example = ex;
isHold = false;
public void sus( )
isHold = true;
public synchronized void conti( )
isHold = false;
notify( );
public void run( )
for (int i = 1000; i>0; i--)
if (i%2 == 1)
example.color = Color.red;
else
example.color = Color.blue;
example.setInt(i);
example.repaint( );
try
sleep(1000);
synchronized
while(isHold)
wait ( );
catch (InterruptedException ie)
<HTML>
<HEAD>
<TITLE>Example3_4</TITLE>
</HEAD>
<BODY>
<applet code="Example3_4.class" width=300 height=400>
</applet>
</BODY>
</HTML>
①stop.addActionListener(new ActionListener(){
②class Counter extends Thread
③synchronized(this)
下面程序是一个计时器,从1000秒开始倒计时,直到为0结束。在界面上有两个按钮,一个可以暂停计时,另一个可以继续已经暂停的计时。请更正题中带下划线的部分。
注意:不改动程序的结构,不得增行或删行
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class Example3_4 extends Applet
{
public Color color = Color.red;
private int num= 1000;
public Counter theCounter;
private Button stop;
private Button start;
public void init( )
{
stop = new Button("暂停");
start = new Button ("继续");
theCounter = new Counter(this);
stop.addActionListener(new Lst( ) implements ActionListener{
public void actionPerformed(ActionEvent e)
{
theCounter.sus( );
}
});
start.addActionListener(new SuspenListener( ));
add(start);
add(stop);
theCounter.start( );
}
public void paint(Graphics g)
{
g.setCotor(color);
g.drawString(String.valueOf(num),50,50);
}
public void setInt(int i)
{
num=i;
}
class SuspenListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
theCounter.conti ( );
}
}
}
public class Counter extends Thread
{
Example3_4 example;
boolean isHold;
Counter (Example3_4 ex)
{
this.example = ex;
isHold = false;
}
public void sus( )
{
isHold = true;
}
public synchronized void conti( )
{
isHold = false;
notify( );
}
public void run( )
{
for (int i = 1000; i>0; i--)
{
if (i%2 == 1)
example.color = Color.red;
else
example.color = Color.blue;
example.setInt(i);
example.repaint( );
try
{
sleep(1000);
synchronized {
while(isHold)
wait ( );
}
}
catch (InterruptedException ie)
{}
}
}
}
<HTML>
<HEAD>
<TITLE>Example3_4</TITLE>
</HEAD>
<BODY>
<applet code="Example3_4.class" width=300 height=400>
</applet>
</BODY>
</HTML>