A.在包ch1 中新建一个文件file22.txt, 并且在其中写入一行字符串“xiaomingl2345612”
B.在包ch1中新建一个文件file22.txt,并且在其中写入一行字符串“xiaoming, 123456,12”
C.在包chi中新建一个文件file22.txt,并且在其中写入一行字符串“xiaoming'’
D.抛出IOException
[单选题]下列程序的运行结果是______。 package ch1; import java.io. *; public class ex28 { public static void main (String args [] ) throws IOException { try { File f1 = new File("ch1//dir28"); f1.mkdir(); File f2 = new File(f1, "file59.txt"); FileOutputStream fos =
[单选题]下列语句序列执行后,ch1的值是()。char ch1=’A’,ch2=’W’;if(ch1+2
[单选题]下面程序的输出结果是( )。 import java. awt.*; import java. applet.*; public class HelloApplet extends Applet { public void paint(Graphics g) { g.drawString("Hello World! ",20,20); } }A.20,20B.Hello World!C.编译不能通过D.以上都不对
[单选题]选择正确的语句填在下列程序的横线处,使程序正常运行。 package ch1; import java. io. *; import j ava. util. *; class C45 implements Seritizable ______Public Thread t = new Thread(new T45(), "t"); public intcnt = 0; public C45() { t. start ( ) class T45 implements Runnable pub
[单选题]执行下面的程序后,输出的结果是 K=1 For j=1 To 4 X=X - 1: y=0 For k=1 To 4 X=X + 1: y=y + 1 Next k Next j Print X;yA.1 4B.13 4C.12 8D.20 6
[单选题]下列程序段的执行结果是______ 。 k=0 For j=1 To 2 For i=1 To 3 k = i+ 1 Next i For i=1 To 7 k= k + 1 Next i Next j Print kA. 11B.10C.9D.8
[单选题]下列程序的输出结果是______。 main() { int i,j; for(j=10;j<11;i++) { for(i=9;i<j;i++) if(!(j%i))break; if(i>=j-1)printf(”%d”,i); } }A.11B.10C.9D.10 11
[单选题]下列程序段的执行结果是______。 i=0 For j = 10 To 19 Step 3 i=i+1 Next j Print IA.4B.5C.3D.6
[单选题]下列程序段的执行的结果是 Dim a(10),b(10) i=3 For j=1 To 5 a(j) =j b(i) =2 * i + j Next j Print b(i);a(i)A.11 3B.3 15C.3 11D.15 3
[单选题]下列程序执行后,执行的结果是______ 。 Dim M(2) For i = 1 To 2 M(i) = 0 Next i k=2 For i = 1 To k For j = 1 To k M(j) = M(i) + 1 Print M(k): Next j Next IA.1234B.0123C.223D.2345