Java复习题三阅读程序题软件

1、JAVA程序设计复习题之（三）阅读程序题三、程序阅读题1阅读以下程序import java.io.*;public class Reverse2 public static void main(String args )int i,n=10;int a = new int10;try BufferedReader br = new BufferedReader(new InputStreamReader(System.in);ai = Integer.parseInt(br.readLine() ); catch (IOException e) ;for (i= n-1; i >= 0;

2、 i=i-2)请写出该程序的功能：该程序使用字符缓冲输入流从键盘输入 10 个数，然后倒序并间隔打印出来2阅读以下程序import java.io.* ;public class abc public static void main(String args ) int i, s = 0 ;int a = 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120 ;for ( i = 0 ; i< a.length ; i+ )if (i % 3 = 0) s += ai;请写出该程序的输出结果：s=2603、阅读以下程序：import java.io.

3、*;public class TestRandomAccess public static void main(String args) int data_arr=65,66,56,23,27,1,43,65,4,99;try RandomAccessFile randf=new RandomAccessFile("temp.dat","rw");for (int i=0; i<data_arr.length; i+)randf.writelnt(data_arri);randf.writeUTF("Good morning!"

4、); 'for(int i=data_arr.length-l; i>=0; i=i-2) randf.seek(i*4);System,out.print(" "+randf.readInt();randf.seek(40);randf.close(); catch (IOException e) 该程序的输出结果是：99 65 1 23 66 Good morning!4、阅读以下程序并填空。class extends Exception String mymsg=" 我自己定义的异常！ "double mynum = 2.0;MyEx

5、ception () super(" 首字母不能为 A! ") ； MyException (String msg) / 调用父类构造方法 , 参数为 msgpublic double mymethod() return Math.sqrt(mynum); class ExceptionTest public static void main(String args) try if ( argsO.charAt(O)= 'A') MyException e = new MyException();e.displayme();Systemout println

6、("*in try*"); / 抛出异常 e else if(argsO.charAt(O)= 'B') throw new MyException ("第一个字符不应是 B! ") ； catch ( ) aaa.displayme(); catch( ) 程序填空：MyExceptionsuper(msg)throw eMyException aaaArrayIndexOutOfBoundsException5、阅读以下程序import java.io.*；public class Test public static void ma

7、in(String args) SubSubClass m=new SubSubClass(3,6,6);m.show();class SuperClass int a,b;SuperClass(int x,int y) a=x; b=y; class SubClass extends SuperClass int c;SubClass(int aa,int bb,int cc) super(aa,bb);c = cc;class SubSubClass extends SubClass int a ；SubSubClass(int aa,int bb,int cc) super(aa,bb,

8、cc);a = aa + bb + cc;void show()请写出该程序的运行结果：a=60b=20c=30 6、阅读以下程序import java.io.*;public class abc public static void main(String args) String sl = "Hello!"String s2 = new String("World!");请写出该程序的运行结果：Hello!World!7、阅读以下程序import java.io.*;public class Class1 public static void mai

9、n(String args)int i ，max， min；int a = 12,67,8,98,23,56,124,55,99,100);max= min= a0;for(i=1; i<a.length; i+)if( ai< min) min = ai;if( ai> max) max = ai;请写出该程序完成的功能：在数组中查找并输出最大值和最小值。8、阅读以下程序import java.awt.*;public class DrawMylmage extends Applet Image myImage; / 定义一个图像类 Image 的对象 myImagepub

10、lic void init()myImage= getImage(getDocumentBase(),"pica.jpg");g.drawImage(myImage,0,0,this);请写出该程序的功能：在 Applet 界面中显示当前文件夹下名为“ pica.jpg ”的图像。9、阅读以下程序并填空。import java.awt.*;import java.applet.*;import .*;public class Mypicture Applet Image image;public void () try image=getlmage(new URL(getC

11、odeBase(),'image.gif'); (MalformedURLException e) public void paint(Graphics g) g.drawlmage(image,0,0,);public void start() ();程序填空题： extends init catch this repaint10、阅读以下程序： public class Sum public static void main( String args) double sum = 0.0 ;for ( int i = 1; i<= 100; i + )sum += i;

12、,该程序完成的功能是：求 sum=1+2+3+.+100 的和。11、阅读以下程序：class SuperClass int a,b;SuperClass(int x,int y) a=x; b=y; class SubClass extends SuperClass int c;SubClass(int aa,int bb,int cc) super(aa,bb);c=cc;voidshow() class SubSubClass extends SubClass int a;SubSubClass(int aa,int bb,int cc) super(aa,bb,cc);a=aa+bb+

13、cc;void show()class test public static void main(String args) SuperClass p=new SubSubClass(10,20,30);p.show();该程序的输出结果是：a=60 b=20c=30 12、阅读以下程序：import java.io.*;publiic class Test public static void main(String args) AB s = new AB("Hello!","I love Java.");class AB String sl;Strin

14、g s2;AB( String strl, String str2 ) sl = str1; s2 = str2;public String toString() return sl + s2; 该程序的输出结果是：Hello!I love Java.13、阅读以下程序，并填空。import class MyCopy public static void main(Stringo args) int ch;FileInputStream fin; fout;try fin = new FileInputStream(args0); fout = new FileOutputStream();c

15、h = fin.read();while(ch!=-1) ch = fin.read();fin.close(); fout.close(); catch ( e1) System.exit(0); catch (FileNotFoundException e3) catch (IOException e2) 程序填空：import java.io.*;FileOutputStreamargs0 fout.write(ch);ArrayIndexOutOfBoundsException 14、阅读以下程序import java.io.*；public class Reverse public

16、static void main(String args) int i,n=10;int a = new int10;for(i=0; i<n; i+)try BufferedReader br= new BufferedReader( new InputStreamReader(System.in);输入一个整数ai=Integer.parseInt(br.readLine(); / catch (IOException e) ;for (i = n-1; i >= 0; i-)请写出此程序功能： 程序运行时从键盘输入 10 个整数，然后倒序输出。15、阅读以下程序import

17、java.io.* ;public class Test public static void main(String args ) int i, s = 0;int a = 10, 20, 30, 40, 50, 60, 70, 80, 90;for ( i = 0 ; i < a.length; i+ )if(ai % 3 = 0) s += ai;请写出此程序的输出结果：s=18016、阅读以下程序(提示：注意同步) class Onesynchronized void display(int num) try Thread.sleep(1000); catch (Interrup

18、tedException e) ”中断” ) ；”完成” ) ；class Two implements Runnable int number;One one;Thread t;public Two(One one_num, int n) one = one_num;number = n;t = new Thread(this);t.start();public void run()one.display(number);public class Synch public static void main(String args) throws InterruptedException On

19、e one = new One();int digit = 100;Two s1 = new Two(one,digit);Two s2 = new Two(one,digit);Two s3 = new Two(one,digit);Two s4 = new Two(one,digit);此程序的输出结果是：two 100完成two 100完成two 100完成two 100完成Synch 结束！17、阅读以下程序，并填空。import class FileTypepublic static void main(String args)try FileReader fis = new(arg

20、s0);BufferedReader reader = new BufferedReader( ); String s ；while(s=reader.readLine()!=) fis.close();reader.close(); catch (IOException e) catch ( e1) “缺少命令行参数！”);程序填空：java.io.*;int i;FileReaderfisnullArrayIndexOutOfBoundsException18、阅读以下程序：public class Sum public static void main(String args) doub

21、le sum = 0.0 ： for (int i=1; i<=100; i+) sum += i*i ；该程序的功能是：求出sum的值为1到100的平方和。19 、阅读以下程序：class Example public static void main(String args) int a = new int33;a00=1; a11=1; a22=1;for (int i=0; i < a.length; i+) for(int j=0; j < ai.length; j+) 该程序的输出结果是：1 0 00 1 00 0 120、阅读以下程序：public class

22、Test2static boolean foo(char c)return true;public static void main(String args)int i = 0 ：for(foo('A'); foo('B') && (i<2); foo('C')i+;foo('D');此程序的输出结果是："ABDCBDCB"21、阅读以下程序，并填空。import ;public class OvalDrawer extends Frame implements Runnablepriva

23、te Color colors= Color.RED,Color.BLACK,Color.BLUE,Color.GREEN,Color.DARK_GRAY ;private Color color;private int x=l0,y=10,width=10,height=10;public OvalDrawer(String title)super(title); / 设置窗口大小为 300*300setVisible(true); / 创建线程并启动public void run() while(true) x = (int)(Math.random0*300);y = (int)(Mat

24、h.random0*300);width = (int)(Math.random()*100);height = (int)(Math.random()*100);color = colors(int)(Math.random()*(colors.length-1); / 刷新窗口内容try Thread.sleep(400); catch(InterruptedException e) throw new RuntimeException(e);public void paint(Graphics g)g.setColor(color); / 画椭圆public static void ma

25、in(String args) new OvaIDrawer("hello");程序填空：java.awt.*;setSize(300,300);new Thread(this).start();repaint();g.drawOval(x,y,width,height);22、阅读以下程序：public class Sum public static void main(String args) double sum = 0.0 ；for (int i=1; i<=100; i+)sum += 1.0 / (double)i; 此程序完成的功能是： 求解 sum=1

26、+1/2+1/3+.+1/100 的值并打印输出。23、阅读以下程序： import java.awt.*;public class Applet1 extends Applet public void paint(Graphics g) g.drawLine(30,5,100,45);g.drawRect(30,50,50,20);g.drawOval(30,80,50,40);g.drawString("They are figures! ",30,150);此程序完成的功能是：在 Applet 界面中显示一些由直线、矩形框、椭圆框和文字组成的图形24、阅读以下程序：i

27、mport java.io.*;public class Test public static void main(String args) int i;int a=11,22,33,44,55,66,77,88,99;for(i=0; i <= a.length/2; i+) 此程序的输出结果是： 110 110 110 110 11025、阅读程序并填空 import java.awt.*;import java.applet.*;public class DrawStringDemo Applet private Font afont = Font("Helvetica&

28、quot;,Font.BOLD,18);public void init() (Color.black);public void paint(Graphics g) g.setColor(Color.green);(afont);("This is a test",10,40); 程序填空： extends new setBackground setFont drawString26、阅读以下程序 public class Test(public static void main(String args) 此程序的输出是： sqrt(2.0)=1.41421427、阅读以下

29、程序 public class SumTest public static void main(String args) double sum = 0.0;for(int i=1; i <= args.length; i+)sum += Double.parseDouble(argsi);此程序完成的功能是：从命令行输入若干个数，求这若干个数的和并输出结果28、阅读以下程序class IfTest public static void main(String args)double y,x;Scanner keyin = new Scanner(System.in);”请输入 x 的值：

30、”);x = keyin.nextDouble();if ( x > 0 ) y = 2 * x;else if( x = 0) y = 2 + Math.cos(x);else y = x * x + 1;此程序完成的功能是：从键盘输入一个数x，根据x的值求出相应的y值。2*xx>0y= 2 + cos(x) x=0x2+1x<029、阅读以下程序，完成填空，使其完整。import ;class Rectangle public static void main(String args) w,l,S,s; / 定义变量Scanner keyin = new Scanner(System.in);