JAVA程序设计题，请大神帮忙，很简单，是一道基础题。

package comxkparent;

public  class Shape {

 public Shape() {

 }

}

package comxksub;

import comxkparentShape;

//正方形

public class Square extends Shape implements Computer{

 protected  double width;

 protected double length;

 public Square() {

  width=0;

  length=0;

 }

 public Square(double width,double length) {

  thislength=length;

  thiswidth=width;

 }

 public double computeArea() {

  return lengthwidth;

 }

 public double computePerimeter() {

  return length2+width2;

 }

 public double getWidth() {

  return thiswidth;

 }

 public void setWidth(double width) {

  thiswidth=width;

 }

 public double getLength() {

  return thislength;

 }

 public void setLength(double length) {

  thislength=length;

 }

}   

package comxksub;

//棱形

public class Prismatic extends Square {

 private double height;

 public Prismatic() {

  super();

  thisheight=0;

 }

 public Prismatic(double width,double length,double height) {

  super(width,length);

  thisheight=height;

 }

 public double getHeight() {

  return thisheight;

 }

 public void setHeight(double height) {

  thisheight=height;

 }

 @Override

 public double computeArea() {

  return thiswidththisheight;

 }

 @Override

 public double computePerimeter() {

  return supercomputePerimeter();

 }

}

package comxksub;

//接口

public  interface Computer {

 public double computeArea();

 public double computePerimeter();

}

3改错题

仔细阅读以下程序，改正程序中的错误（星号下面的语句），使程序能输出正确的结果。

注意：

(1)不改动程序的结构，不得增行或删行。

(2)不能更改定义类和方法的访问修饰符。

//Java3java

public class Java3{

String xh;

String name;

int score;

/found/

public void Java3(String num, String xm, int sco)

{

xh = num;

name = xm;

score = sco;

}

/found/

public boolean changeInfo(int sco, String num)

{

if(score== sco&&xh==num){

result = true;

}

else

result = false;

}

public static void main(String args[]){

Java3 java3=new Java3("090101","Tom",100);

if(java3changeInfo("090101",100))

Systemoutprintln("score no change!");

else

Systemoutprintln("score change!");

}

你的题有很多错误，我给你改了一下。

1设变量i和j的定义如下，试分别计算下列表达式的值：

int i=1; double d=10;

1题 35/4 [8]

2题 46%9+44-2 [15]

3题 45+43%5（233%2）[48]

4题 45+4550%i-- [45]

5题 45+4550%（i--） [45]

6题 153+（++d） [65]

7题 153+d++ [55]

8题 i+=3/i+3 [7]

程序阅读题

1给定如下代码，写出程序运行结果

class Example{

public static void main(String arges[]){

int i=0;

do{

Systemoutprintln("doing it for i is:"+i);

}while(--i>0);

Systemoutprintln("finish");

}

}

结果如下：

doing it for i is:0

finish

2 阅读程序段写出执行结果

for(int k=1;k<=5;k++){

if(k>4)break;

Systemoutprintln("k="+k);

}

结果：

k=1

k=2

k=3

k=4

3试写出下列程序段循环的运行结果

int i=1;

while(i<10)

if(i++%2==0)

Systemoutprintln(i);

结果：

3

5

7

9

*** 作题

求1!+2!++10!

public static void main(String arges[]){

long sum = 0;

for(int i = 1; i <= 10; i++) {

long s = 1;

for(int j = 1; j <= i; j++) {

s = j;

}

sum += s;

}

Systemoutprintln("sum = " + sum);

}

求100之内的所有“完数”。完数是指等于它的因子和的数。例如：6=1+2+3，6=123，则6是一个完数

public class wanshu{

public static void main(String[] args) {

for(int i = 1; i <= 100; i++) {

if(fun(i)) {

Systemoutprintln(i);

}

}

}

public static boolean fun(int num) {

int sum = 0;

for(int i = 1; i < num; i++) {

if(num % i == 0) {

sum += i;

}

}

return num == sum;

}

}

public class Car{

private String carNum;

private String carColor;

private int carSpeed;

public Car(String carNum,String carColor,int carSpeed){ //构造方法

thiscarNum=carNum;

thiscarColor=carColor;

thiscarSpeed=carSpeed;

}

public void addSpeed(int num){ //加速方法

thiscarSpeed+=num;

}

public void subSpeed(int num){ //减速方法

if(thiscarSpeed-num>=0){

thiscarSpeed-=num;

}

}

}

没那么多时间，帮着写个第1题吧

// 编写求一个整数数组A[10,15,12,9,7]中最小元素min和元素之和sum的

int [] a = {10,15,15,9,7};

// 最小元素

int min=0;

// 数组和

int sum=0;

for(int i=0; i<alength; i++ ){

sum += a[i];

if(i == 0){

min = a[i];

}else{

if(a[i] < min){

min = a[i];

}

}

}

Systemoutprintln("当前数组中最小的元素值是: "+min);

Systemoutprintln("当前数组和是: "+sum);

import javatextParseException;

import javatextSimpleDateFormat;

import javautilDate;

class Student {

private String id;

private String name;

private boolean isMale;

private Date birth;

public Student() {

super();

}

public Student(String id, String name, boolean isMale, Date birth) {

super();

thisid = id;

thisname = name;

thisisMale = isMale;

thisbirth = birth;

}

public String getId() {

return id;

}

public void setId(String id) {

thisid = id;

}

public String getName() {

return name;

}

public void setName(String name) {

thisname = name;

}

public boolean isMale() {

return isMale;

}

public void setMale(boolean isMale) {

thisisMale = isMale;

}

public Date getBirth() {

return birth;

}

public void setBirth(Date birth) {

thisbirth = birth;

}

@Override

public String toString() {

return "Student [id=" + id + ", name=" + name + ", isMale=" + isMale + ", birth=" + birth + "]";

}

}

public class StudentTest {

public static void main(String[] args) throws ParseException {

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd");

Student stu = new Student("00001", "Tom", true, dateFormatparse("2000-01-01"));

Systemoutprintln(stu);

}

}

1

import javautilScanner;

public class Cube{

private double len; //定义边长

//获得边长

public double getLen() {

return len;

}

//赋值边长

public void setLen(double len) {

thislen = len;

}

//计算表面积

public double getArea(double len){

return lenlen6;

}

//计算体积

public double getVolume(double len){

return lenlenlen;

}

public static void main(String[] args) {

Cube c = new Cube();

Systemoutprint("请输入边长：");

csetLen(new Scanner(Systemin)nextDouble());

Systemoutprintln("边长为："+cgetLen()+"的立方体，表面积是："+cgetArea(cgetLen())

+"，体积是："+cgetVolume(cgetLen())+"。");

}

}

2

import javautilScanner;

public class Student{

private String stuName; //定义姓名

private double chineseScore; //定义语文成绩

private double mathScore; //定义数学成绩

private double computerScore;

public String getStuName() {

return stuName;

}

public void setStuName(String stuName) {

thisstuName = stuName;

}

public double getChineseScore() {

return chineseScore;

}

public void setChineseScore(double chineseScore) {

thischineseScore = chineseScore;

}

public double getMathScore() {

return mathScore;

}

public void setMathScore(double mathScore) {

thismathScore = mathScore;

}

public double getComputerScore() {

return computerScore;

}

public void setComputerScore(double computerScore) {

thiscomputerScore = computerScore;

}

public double avg(double chineseScore,double mathScore,double computerScore){

return (chineseScore+mathScore+computerScore)10/3;

}

public static void main(String[] args) {

Student stu = new Student();

Systemoutprint("请输入学生姓名：");

stusetStuName(new Scanner(Systemin)next());

Systemoutprint("请输入该学生语文成绩：");

stusetChineseScore(new Scanner(Systemin)nextDouble());

Systemoutprint("请输入该学生数学成绩：");

stusetMathScore(new Scanner(Systemin)nextDouble());

Systemoutprint("请输入该学生计算机成绩：");

stusetComputerScore(new Scanner(Systemin)nextDouble());

Systemoutprintln(stugetStuName()+"学生的平均成绩是"+

stuavg(stugetChineseScore(), stugetMathScore(), stugetComputerScore()));

}

}

1、package nettest;

public class TestArray

{

int a[]={12,34,5,7,9,10};

public int max()

{

int j = a[1];

for(int i :a)

{

if(i > j)

{

j = i ;

}

}

return j;

}

public long avrage()

{

long j = 0l;

for(int i :a)

{

j = j + i;

}

return j/alength;

}

}

2、package nettest;

public class Person

{

String name;

int age;

Person(String name,int age)

{

thisname = name;

thisage = age;

}

public void printInfo()

{

Systemoutprintln("name = "+thisname+" age = "+thisage);

}

}

package nettest;

public class Student extends Person

{

String studentId;

Student(String name, int age)

{

super(name, age);

}

Student(String name, int age,String studentId)

{

super(name, age);

thisstudentId = studentId;

}

public void printInfo()

{

Systemoutprintln("name = "+thisname+" age = "+thisage+" StudentId =" + thisstudentId);

}

}

3、package nettest;

public class TestPrint

{

public static void main(String[] args)

{

for (int i = 1; i<10;i++)

{

for(int j = 0; j<i;j++)

{

Systemoutprint("");

}

Systemoutprintln();

}

}

}

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