java经典考试程序.doc

显示hello java!public class Examplepublic static void main(String args)System.out.println(Hello Java!); 求圆的周长和面积public class Yuanpublic static void main(String args)double r=0,l=0,s=0;r=Double.parseDouble(args0);l=2*3.1415926*r;s=3.1415926*r*r;System.out.println(圆的周长为：+l);System.out.println(圆的面积为：+s); 计算一个给定底和高的直角三角形的斜边长public class Sanjiaoxingpublic static void main(String args)double base=0,height=0,length=0;base=Double.parseDouble(args0);height=Double.parseDouble(args1);length=Math.sqrt(base*base+height*height);System.out.println(三角形斜边为：+length); 求a+aa+aaa+.的和，其中a为1-9之间的整数，例如，当a=3、n=4时，求3+33+333+3333的和public class Test3_1public static void main(String args)int a=Integer.parseInt(args0);int n=Integer.parseInt(args1);int sum=0;int temp=0;for(int i=0;i0)n=m%10;m=m/10;System.out.println(n+ );i+;w=w*10; m=k;System.out.println(nDigital Number:+i);System.out.println(right Order:);w=w/10;while(w=1)n=m/w;System.out.println(n+ );m=m%w;w=w/10; 鸡和兔装在同一个笼子中，已知它们在一起一共有f只脚，h只头，求有多少只鸡和多少只兔public class Test3_3public static void main(String args)int f,h;int chicken,rabbit;f=Integer.parseInt(args0);h=Integer.parseInt(args1);if(f%2!=0|h%2!=0)System.out.println(The number of foot or head is wrong!);return; rabbit=f/2-h;chicken=h-rabbit;if(rabbit*4+chicken*2)!=f|(rabbit+chicken)!=h)System.out.println(The number of foot or head is wrong!);elseSystem.out.println(chicken:+chicken);System.out.println(rabbit:+rabbit); 判断素数的方法public class Test4_1public static void Test4_1(int n)int i;for(i=2;in/2) System.out.println(n+是素数);else System.out.println(n+不是素数); public static void main(String args)int n;n=Integer.parseInt(args0);Test4_1(n); 打印Fibonacci数列的方法public class Test4_2public static void Test4_2(int n)long f1=1,f2=1,f3;System.out.print(f1+ +f2);for(int i=2;in;i+) f3=f1+f2;f1=f2;f2=f3;System.out.print( +f2); public static void main(String args)int n;n=Integer.parseInt(args0);Test4_2(n); 计算xn的递归方法public class Test4_3public static long Test4_3(int x,int n)if(n=0) return 1;else return Test4_3(x,n-1)*x; public static void main(String args)int x,n;x=Integer.parseInt(args0);n=Integer.parseInt(args1);System.out.println(x+n+=+Test4_3(x,n); 编写数组的排序程序import java.io.*;public class BubbleSortpublic static void bubble(int a)int count=a.length,i;for(i=0;ii;j-)if(ajaj-1)int temp=aj;aj=aj-1;aj-1=temp; public static void main(String args)final int l=10;int a=new intl;for(int k=0;ka.length;k+)ak=(int)(100*Math.random();System.out.println(Before sort:);for(int i=0;ia.length;i+)System.out.print(ai+ );System.out.println();System.out.println(After sort:);bubble(a);for(int j=0;ja.length;j+)System.out.print(aj+ ); 编写折半查找的程序class Test5_2public static int bisearch(int a,int n)int low=0,high=a.length-1,mid=(low+high)/2;System.out.println(After sort:);for(int k=0;kahigh|nalow) return -1;while(lowmid)low=mid+1;high=high-1; elsehigh=mid-1;low=low+1; return -1;public static void sort(int a)int count=a.length,i;for(i=0;ii;j-)if(ajaj-1)int temp=aj;aj=aj-1;aj-1=temp; public static void main(String args)final int l=10;int a=new intl;int n,i;for(i=0;iargs.length-1;i+)ai=(int)(100*Math.random();n=Integer.parseInt(args0);sort(a);int place=bisearch(a,n);if(place!=-1)System.out.println(n+: +place);elseSystem.out.println(n+ is not found.);产生一个1-12之间的随机整数，并根据该随机整数的值，输出对应月份的英文名称class Test5_3public static void main(String args)Stringmonths=January,February,March,April,May,June,July,Argust,September,October,November,December;int n=(int)(1+Math.random()*12);System.out.println(monthsn-1); 建立包含10个字符串数据的一维数组，每个字符串数据的格式为“月月/日日/年年”，例如06/25/04，将每个日期采用类似“25th June 2004”的格式输出public class Test5_4public static void main(String args)Stringmonths=January,February,March,April,May,June,July,Argust,September,October,November,December;String suffix=1st,2nd,3rd;Stringdate=06/25/04,07/03/07,08/20/08,08/24/08,04/09/02,03/02/01,01/01/05,04/13/01,11/25/09,09/10/03;for(int i=0;idate.length;i+)Stringyear=20+datei.substring(6,8);int month=Integer.parseInt(datei.substring(0,2);int day=Integer.parseInt(datei.substring(3,5);if(day31) System.out.println(Day is illegal!); if(month0 & month0 & day=300&student.getSports()=96)|student.getTotal()School.getLine()System.out.println(student.getMessage()+accepted!);elseSystem.out.println(student.getMessage()+not accepted!);public static void main(String args)School school=new School(350);Student student1=new Student(Joseph,123,310,100);Student student2=new Student(Bill,456,351,80);Student student3=new Student(Herry,789,320,85);status(student1);status(student2);status(student3);求圆球的体积public class Squarepublic static void main(String args)double r=0,v=0;r=Double.parseDouble(args0);v=4*3.1415/3*r*r*r;System.out.println(圆球体积为：+v); 杨辉三角public class Yanghuipublic static void main(String args)int i,j;int a=new int 1111;for(i=1;i11;i+)aii=1;ai1=1; for(i=3;i11;i+)for(j=2;j=i-1;j+)aij=ai-1j-1+ai-1j;for(i=1;i11;i+)for(j=1;j=i;j+)System.out.print(aij+ );System.out.println(n); System.out.println(n);圆柱体class Circledouble x;double y;double r;Circle(double x,double y,double r)this.x=x;this.y=y;this.r=r; public void setX(double x)this.x=x; public void setY(double y)this.y=y; public void setR(double r)this.r=r; public double getX()return x; public double getY() return y; public double getR() return r; public double area()return r*r*3.1416; public double perimeter()return 2*r*3.1416; public void show()System.out.print(x=+x+,y=+y+,Radius=+r); public class Cylinder extends Circledouble h;Cylinder(double x,double y,double r,double h)super(x,y,r);this.h=h; public void setH(double h)this.h=h; public double getH()return h; public double area()return perime