Java运行程序写结果学生版

1、Java练习题二、运行程序写结果1 .当在命令提示符后输入"java SumT est 4 5 ”之后，下列程序的输出结果为:public class SumTest (public static void main(String args) (int a, b, sum;a=Integer.parseInt(args0);b=Integer.parseInt(args1);sum=a+b;System.out.println(a + "+" + b + "=" + sum); 2 .当在命令提示符后输入"java PrintStar

2、 8 ”之后，下列程序的输出结果为:public class PrintStar public static void main(String args) int n = Integer.parseInt(args0);int i;for( i=1; i<=n; i+)System.out.print("*");System.out.println();3 .当在命令提示符后输入 " java CalculateTest5.5'之后，下列程序的输出结果为:public class CalculateTestpublic static void mai

3、n(String args) float x,y;x = Float.parseFloat(args0);if(x<1)y = x;else if(1<=x&&x<10)y = 2*x-1;elsey = 3*x-11;System.out.println(y);4 .当在命令提示符后输入"java Factorial3 3”之后，下列程序的输出结果为:public class Factorial3 public static void main(String口 args) int num = Integer.parseInt(args0);int

4、result = 1;if(num<1)System.out.println("应输入大于 1 的整数！"); elseint i;for( i=1; i<=num; i+)result = result*i;System.out.println("结果是："+result);)5 .下歹U程序的输出结果为： public class Xpublic static void main(String 口 args) String names=new String5;for(int x=0;x<args.length;x+)namesx=a

5、rgsx;System.out.println(names2);) )6 .下列程序的输出结果为：public class Testpublic static void main(String args) System.out.print ( 3.5+1/2+56%10+"");System.out.print ( 3.5+1.0/2+56%10+"");int a = 4%3*7+1;System.out.println( a );7 .下列程序的输出结果为： public class A1 public static void main(String

6、 args口) int a= new int 5;a0=1;a1=2;a2=3;a3=4;a4=5;System.out.print("a"+0+" = "+a0+"");System.out.print("a"+1+" = "+a1+"");System.out.println("a"+2+" = "+a2+"");System.out.print("a"+3+" = "+a

7、3+"");System.out.print("a"+4+" = "+a4); ) )8 .下列程序的输出结果为： public class array1D_1 public static void main(String args) int i;int a;a = new int5;for(i=0;i<5;i+) ai=i;for(i=a.length-1;i>=0;i-)System.out.print( "a " +i +"尸"t + ai +”,) )9 .运行结果是：pub

8、lic class Test1 String str = new String("Hi !");char ch = 'L', 'i', 'k', 'e' );public static void main(String args) Test1 ex = new Test1();System. out .print(ex.str + "");System. out .print(ex.ch);10 .运行结果是：public class Test3 public static void mai

9、n(String args) int i;for (i = 3; i <= 20; i +) if (i % 2) = 0)System. out .print(i + "");)11 .运行结果是：public class Test4 public static void main(String args) int i,sum=0;for (i = 3; i <= 20; i +)if (i % 2) = 0) sum=sum+i;System. out.print("i="+i+",sum="+sum);)12 .运行

10、结果是：public class Test5 public static void main(String args) int i,sum=0;for (i = 1; i <= 100; i +) if (i % 2) = 1) sum=sum+i;)System.out.println(sum);13 .运行结果是class Test6 public static void main(String args) int i;for(i=0;i<10;i+)System.out.print(i+" ");if (i%2!=0) continue;System.ou

11、t.println("");14、运行结果是: public class Test14 public static void main(String args) int n = 1, m, j, i;for (i = 3; i <= 30; i += 2) m = (int) Math.sqrt(double) i);for (j = 2; j <= m; j+)if (i % j) = 0) break;if (j >= m + 1) System.out.print(i + "");if (n % 5 = 0)System.out.

12、print("n");n+;15 .下列程序的输出结果为： public class Testi public static void main(String args) int y, x=1, total=0;while(x<=10) y=x*x;System.out.print(y+"");total+=y;+x;)System.out.print("total is "+total);)16 .下列程序的输出结果为： public class WhileExamplepublic static void main(Stri

13、ng args)String copyFromMe="Copy every letter until you encounter 'u'."StringBuffer copyToMe=new StringBuffer();创建一个空的串变量int i=0;char c=copyFromMe.charAt(i);while(c!='u') copyToMe.append(c);c=copyFromMe.charAt(+i); System.out.println(copyToMe);17 .下列程序的输出结果为： public class Br

14、eakExamplepublic static void main(String args)int array=32,87,3,589,12,1076,2000,8,622;int search = 1076, i=0, j=0;boolean foundIt = false;for (i=0; i<3; i+) for (j=0; j<3; j+)if (arrayij = search) foundIt = true; break; / 跳出内层循环if(foundlt) break; / 跳出外层循环if(foundlt)System.out.println("Fo

15、und " + search + " at i = " + i +", j = " + j);elseSystem.out.println(search + " is not in the array");18 .下列程序的输出结果为： public class SumDemo2 public static void main(String口 args) int sum = 0, i = 0;doif(i%2=0)sum = sum+i;i+;while(i<=20);System.out.println("

16、其最终和是："+sum);19 .下列程序的输出结果为：public class AddTest public static void main(String args) int num1,num2;num1 = 10;num2 = 20;System.out.println(num1 + "+" + num2 + "=" + add(num1,num2);static int add(int op1,int op2)return op1+op2;20 .下列程序的输出结果为： class generalFunctionpublic stati

17、c int add(int x,int y) return x+y; 静态方法public class StaticFunTestpublic static void main(String args)int c=generalFunction.add(7, 8);System.out.print("7 + 8 = " + c+",");generalFunction fun=new generalFunction(); int d= fun.add(5, 8);System.out.println("5 + 8 = " + d);

18、21 .下列程序的输出结果为 class Boxint length,width,height;public void setInfo(int l,int w,int h)length = l;width = w;height = h; public int volumn()return length*width*height; public int area()return (length*width + length*height + width*height) * 2; public String toString()return "Length:" + length

19、 + " width:" + width + " height:" + height+ " volumn: " + volumn() + " area:" + area(); public class BoxTest public static void main(String args) Box b = new Box();b.setInfo(5,2,4);System.out.println(b.toString(); 22 .下列程序的输出结果为： public class Example String st

20、r=new String("good");charch='a','b','c'public static void main(String args) Example ex=new Example();ex.change(ex.str,ex.ch);System.out.print(ex.str+" and ");System.out.print(ex.ch);)public void change(String str,char ch)str="test ok"ch0='g&#

21、39;)23 .下列程序的输出结果为： /arrayParam1.java以数组为参数的方法调用public class arrayParam1public static void main(String args )int a = 8, 3, 7, 88, 9, 23;LeastNumb MinNumber=new LeastNumb();MinNumber.least(a);class LeastNumbpublic void least(int array )int temp = array0;for(int i=0;i<array.length;i+)if(temp>arr

22、ayi) temp = arrayi;System.out.println(" 最小的数为:"+ temp);24 .运行结果是：(B6)(p50例4.11)import java.awt.*;import java.applet.*;class MemberVar static int sn = 30;final int fn;final int fk = 40;MemberVar() fn = + sn;)public class Test10 extends Applet public void paint(Graphics g) MemberVar obj1 = n

23、ew MemberVar();MemberVar obj2 = new MemberVar();g.drawString("obj1.fn=" + obj1.fn, 20, 30);g.drawString("obj1.fk=" + obj1.fk, 20, 50);g.drawString("obj2.fn=" + obj2.fn, 20, 70);g.drawString("obj2.fk=" + obj2.fk, 20, 90); )25 .下列程序的输出结果为： class Astatic int y=3;

24、void showy( )System.out.println("y="+y); ) class testA public static void main(String aaa) A a1=new A();A.y+=1;a1.y+;a1.showy(); 26 .运行结果是：public class Test9 static boolean foo(char c) System.out.print(c);return true;public static void main( String argv ) int i =0;for ( foo('B'); f

25、oo('A')&&(i<2); foo('C')i+ ;10foo('D');)27 .运行结果是：import java.io.*;public class Test2public staticvoid main(String args口)Sub sb = new Sub();System.out.println(sb.method( );)class Fatherint a=3 , b=2 ;int method() return a-b; class Sub extends Fatherint method2( ) r

26、eturn a+b; 28 .下列程序的输出结果为 class Aclass void go() System.out.println("Aclass"); public class Bclass extends Aclass void go() System.out.println("Bclass");public static void main(String args)Aclass a=new Aclass();Aclass a1=new Bclass();a.go()； a1.go();)29 .下列程序的输出结果为：class Ballpriv

27、ate double r;public void setR(double x) r = x;)public double getR() return r;)class Billiards extends Ballprivate String color;public void setCol(String col) color = col;)public void show()System.out.println("台球的颜色是"+color+",半径是"+getR();)public class Demopublic static void main(S

28、tring口 args)Ball b1 = new Ball();b1.setR(10);System.out.println("球的半径是"+b1.getR();Billiards b2 = new Billiards();b2.setR(5);b2.setCol("蓝色)b2.show();)30 .运行结果是： public class Test12 extends TTpublic static void main(String args) 12Test12 t = new Test12 ("Tom");)public Test12(S

29、tring s) super(s);System.out.println("How do you do?");)public Test12()this("I am Tom");)class TTpublic TT()System.out.println("What a pleasure!");)public TT(String s)this();System.out.println("I am "+s);)31 .运行结果是： public class Test13 extends TTpublic static

30、void main(String args口)Test13 t = new Test13 ();)public Test13(String s)super(s);System.out.println("How do you do?");)public Test13()this("I am Tom");)class TT13public TT()System.out.println("What a pleasure!");)public TT(String s)this();System.out.println("I am &

31、quot;+s);)32 .下列程序的输出结果为 ：interface IShapepublic double area();)class square implements IShapedouble length ;public square(double l)length = l;)public double area()return length*length;)public class Test public static void main(String口 args) square s = new square(5);System.out.println(s.area();)33 .

32、运行结果是： class Test11class Dog private String name;private int age;public int step;Dog(String s, int a) name = s;age = a;step = 0;14public void run(Dog fast) fast.step+;)public static void main(String args) Test11 a = new Test11();Dog d = a.new Dog("Kate", 5);d.step = 35;d.run(d);System. out

33、 .println(" " + d.step);)34 .运行结果是：public class Test15 private static int count;private String name;public class Student private int count;private String name;public void Output(int count) count+;this.count+;Test15.count+;+ this.count + " " +Test15.this.count+;System.out.println(

34、count +Test15.count + " " + Test15.this.count);)public Student aStu() return new Student();)public static void main(String args) Test15 g3 = new Test15();g3.count = 10;Test9.Student s1 = g3.aStu();15s1.Output(5);35 .下列程序的输出结果为： public class Q1public static void main(String args) trythrow n

35、ew MyException(); catch(Exception e)System.out.println( "It ' s caught!"); FinallySystem.out.println( "It ' s finally caught! " ); class MyException extends Exception 36 .运行结果是： public class Test10 public static void aMethod() throws Exception trythrow new Exception();cat

36、ch(Exception e)System.out.println("exception000");finallySystem.out.println("finally111");public static void main(String args)tryaMethod();catch(Exception e)16System.out.println("exception");System.out.println("finished");)37 .运行结果是： public class Test10 public

37、 static void aMethod() throws Exception trythrow new Exception();)finallySystem.out.println("finally111");)public static void main(String args儿tryaMethod();)catch(Exception e)System.out.println("exception");)System.out.println("finished");)38 .运行结果是： public class Test10

38、 public static void aMethod() throws Exception trythrow new Exception();)17catch(Exception e)System.out.println("exception000");)public static void main(String args)tryaMethod();)catch(Exception e)System.out.println("exception");)System.out.println("finished");)39 .运行结果是： public class Test1 public static String output =""public static void foo(int i)tryif(i=1)throw new Exception(); output += "1"catch(Exception e