更多"在下列程序的空白处,应填入的正确选项是() Import java"的相关试题:
[单项选择]下面程序的功能是统计字符串中“array”的个数,在程序的空白处应填入的正确选项是 public class FindKeyWords{ public static void main(String[]args) { String text="An array is a data structur that stores a collection of" +"values of the same type. You access each indMdual value" +"through an integer index. For example,if a is an array" +"of inergers,then a[i]is the ith integer in the array."; int arrayCount=0; int index=-1; String arrayStr="array"; index=text.indexOf(arrayStr); while(index>=0) { ++arrayCount; index+=arrayStr.length( ); index=text.indexOf(arrayStr,index); } System.out.println("the text contains"+arrayCount+"arrays"); } }
A. <
B. =
C. <=
D. >=
[单项选择]
下列程序的功能是统计字符串中“array”的个数,在程序的空白处应填入的正确选项是()
public class FindKeyWords{
public static void main(sring[] args){
sting text=
“ An array is a data structur that stores a collection of”
+ “values of the same type . You access each individual value”
+ “through an integer index . For example,if a is an array”
+ “of inergers, then a[i] is the ith integer in the array.”;
Int arrayCount =0;
Int idex = -1;
Sting arrarStr =”array”;
Index = text.indexof(arrayStr);
While(index 0) {
++arrayCount;
Index += arrayStr.length( );
Index = text.indexof(arrayStr,index);
}
System.out.println
(“the text contains” + arrayCount + “arrays”);
}
}
A. <
B. =
C. <=
D. >=
[单项选择]下列程序的功能是统计字符串中“array”的个数,在程序的空白处应填入的正确选项是( )。
public class FindKeyWords
public static void main(sring[]args)
sting text=
"An array is a data structur that stores a collection of"
+"values of the same type. You access each individual value"
+"through an integer index. For example,if a is an array"
+"of inergers,then a[i]is the ith integer in the array.";
Int arrayCount=0;
Int idex=-1;
Sting arrarStr="array";
Index=text.indexof(arravStr);
While(index______0)
++arrayCount;
Index+=arrayStr.length( );
Index=text.indexof(arrayStr,index);
System.out.println
("the text contains"+arrayCount+"arrays");
A. <
B. =
C. <=
D. >=
[单项选择]在下面程序的空白处,应填入的正确选项是 import java.io.*; public class writeInt { 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.length;i++)dos.writeInt(myArray[i]); dos.______; System.out.println("Have written binary file ints.dat"); }catch(IOException ioe){System.out.println("IO Exception");} } }
A. start()
B. close()
C. read()
D. write()
[单项选择]在下列程序的空白处,应填入的正确选项是()。
Importjava.io.*;
PulilcclassObjectStreamTest
Publilcstaticvoidmain(string args [])thowsIOException
ObjectOutputStream oos=new ObjectOutputStream
(newFileOutputStream(“serial.bln”));
Java.util.Dated=newJava.util.Date( );
Oos______(d);
ObjectlnputStreamois=
newObjectlnputStream(newFileOutputStream(“serial.bin”));
try
iava.util.daterestoredDate=
(Java.util.Date)ois.readObject( );
System.out.println
(“readobjectbackfromserial.binfile:”
+restoredDate);
Catch(ClassNotFoundException cnf)
System.out.println(“classnotfound”);
A. WriterObject
B. Writer
C. BufferedWriter
D. writerObject
[单项选择]在下列程序的空白处,应填入的正确选项是()。
importjava.io.*;
PublicclasswriteInt
Publicstaticvoidmain(stringl)a)
Int[]myArray=10,20,30,40;
try
DataOutputSystemdos=newDataOutputSystem
(newFileOu中utSystem(“ints.dat”));
for (int i=0;I<MYARRAY.LENGTH:I++)
dos.writeInt(myArray[i];
dos.______";
System.out.println
(“Havewritten binary flleints.dat”);
Catch(IOExceptiOniOe)
System.out.println(“IOException”);
A. start()
B. Close()
C. read()
D. write()
[单项选择]
在下列程序的空白处,应填入的正确选项是()
import java.io.*;
Public class writeInt{
Public static void main(string[ ] a) {
Int[ ] myArray = {10,20,30,40};
try{
DataOutputSystem dos= new DataOutputSystem
(new FileOutputSystem(“ints.dat”));
for (int i=0;I dos。writeInt(myArray[i]);
dos._____
System.out.println
(“Have written binary file ints.dat”);
}
Catch(IOException ioe)
{ System.out.println(“IO Exception”);
}
}
}
A. start( )
B. close( )
C. read( )
D. write( )
[单项选择]在下列程序的空白处,应填入的正确选项是( )。
Import java.io.*;
Pulilc class ObjectStreamTest
Publilc static void main(string args[])throws IOException
ObjectoutputStream oos=new ObjectOutputStream
(new FileOutputStream("serial.bin"));
Java.util.Date d=new Java.util.Date( );
Oos______(d);
ObjectInputStream ois=
new ObjectInputStream(new FileOutputStream("serial.bin"));
try
java.util.date restoredDate=
(Java.util.Date)ois.readObject( );
System.out.println
("read object back from serial.bin file:"
+restoredDate);
Catch(ClassNotFoundException cnf)
System.out.println("class not found");
A. WriterOhject
B. Writer
C. BufferedWriter
D. writerObject
[单项选择]在下列程序的空白处,应填入的正确选项是( )。
import java.io.*;
Public class writeInt
Public static void main(string[]a)
Int[]myArray=10,20,30,40);
try
DataOutputSystem dos=new DataOutputSystem
(new FileOutputSystem("ints.dat"));
for(int i=0;I<MYARRAY.LENGTH;I++)
dos.writeInt(myArray[i]);
dos.______;
System.out.println
("Have written binary file ints.dat");
Catch(IOException ioe)
System.out.println("IO Exception");
A. start()
B. close()
C. read()
D. write()
[单项选择]下列程序是将一个十进制正整数转化为一个八进制数,在程序的空白处应填入的语句是_______。 #include<stdio.h> main( ) { int i=9,a,b[10]={0}; scanf("%d",&A) ; sub(a,B) ; for(;i>=0;i--)printf("%d",b[i]); } sub(int c,int d[]) { int e,i=0; while(c!=0) {e=c%8; d[i]=e; ________. i++; } return; }
A. c=e/8
B. c=c%8
C. c=c/8
D. c=e%8
[填空题]
下列代码的功能是把按钮save添加到窗口myFrame的中间,在空白处应填入的代码是()。
public class MyFrame
public static void main(String[] args)
JFrame myFrame=new JFrame( );
JButton save=new JButton( );
myFrame.getContentPane( ).add(save,"______");
myFrame.setSize(200, 200);
myFrame.setVisible(true);
[填空题]下列代码的功能是把按钮save添加到窗口myFrame的中间,在空白处应填入的代码是______。
import Javax.swing.*;
public calss MyFrame
public static void main(String args[])
JFrame myFrame=new JFrame( );
JButton save=new JButton("Save");
myFrame.getContentPane( )add(save,"______");
myFrame.setSize(200,200);
myFrame.setVisible(true);
[单项选择]下列的程序的功能是求2~100之间的素数,程序中划线部分应填入的选项是 public class Testnn { public static void main(String args[]) { Labell: for(int i=2;i<100;i++) { for(int j=2;j<i;j++) { if(i%j==______)continue Labell; } System.out.println(i); } } }
A. 0
B. 1
C. i
D. j
[单项选择]在程序的下划线处应填入的选项是()。
publicclassTest______
publicstaticvoidmain(Stringargs[])
Testt=newTest( )
Threadtt=newThread(t);
tt.start( );
publicvoidmn( )
for(inti=0;i<5;i++)
System.out.println("i="+i);
A. implementsRunnable
B. extendsThread
C. implementsThread
D. extendsRunnable
[单项选择]在程序的下划线处应填入的选项是( )。
publicclassTest______
publicstaticvoidmain(Stringargs[])
Testt=newTest( )
Threadtt=newThread(t);
tt.start( );
publicvoidmn( )
for(inti=0;i<5;i++)
System.out.println("i="+i);
A. implementsRunnable
B. extendsThread
C. implementsThread
D. extendsRunnable