Private Sub Text1_KeyDown(KeyCode As Integer, ShIft As Integer)
key1 = KeyCode > 0
Print key1
End Sub
A.True B.False C.65 D.0
Private Sub Text1_KeyDown(KeyCode As Integer, ShIft As Integer)
key1 = KeyCode > 0
Print key1
End Sub
A.True B.False C.65 D.0
s2;staticvoidMain(stringDargs){s2=s1+s2;Console.WriteLine(s2);}}
A.代码编译失败
B.运行时错误,抛出NullPointerException异常
C.打印输出nullnull
D.代码编译成功,打印输出内容为空白行
注意:不改动程序的结构,不得增行或删行。
import java.awt.*;
import java.applet.*;
import java.lang.*;
public class exl2_3 extends Applet{
private TextField tf;
private Button btn;
public void init(){
tf=new TextField(25);
add(tf);
btn=new Button("确定");
add(btn);
resize(250,200);
}
public void paint(Craphics g){
try{
int n= tf.getText();
int i,j,x=20,y=60;
for(i=0;i<n;++){
for(j=1;j<=n;j++){
g.drawString(Integer.toString(i)+"*"
+Integer.toString(j)+"="
+Integer.toString(i*j),
i*x,j*y);
}
}
}
catch(NuaberFormatEXCeption nfe){
g.drawString("error namber!",20,50);
}
}
public boolean action(Event e,Object o){
if(o=="确定"){
repaint();
return true;
}
else
return false;
}
}
exl2_3.html
<HTML>
<HEAD>
<TITLE>exl2_3</TITLE>
</HEAD>
<BODY>
<applet code="exl2_3.class"width=800 height=400>
</applet>
</BODY>
</HTMI>
1 2 3 4
1 2 3 4
1 2 3 4
l 2 3 4
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
Private Sub Command1_Click()
Dim a(4,4)
For k=1 To 4
For j=1 To 4
a(k,j)=j
Print a(k,j);
Next
Next
For k=2 To 4
For j=1 To【 】
t=a(j,k)
a(j,k)=【 】
a(k,j)=t
Next
Next
For k=1 To 4
Print a(k,1);a(k,2);a(k,3);a(k,4)
Next
End Sub
B.动画是活动的画面,现在的动画素材可通过Photoshop制作。
C.视频卡具有模拟视频与数字视频相互转换的功能
D.数字视频的最主要途径是利用摄像机录制和视频采集卡采集获取的
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