一个很简单的java程序题(java程序编程题)

  • 1、简单的java程序题
  • 2、5道简单的JAVA编程题(高分悬赏)
  • 3、一道简单的java编程题?
  • 4、一个简单的Java编程题?

public

class

student{

private

string

stuid;

private

string

stuname;

private

char

stusex;

private

int

stuage;

/**

*以下是各属性的getter/setter方法

*/

public

void

setstuid(string

stuid){

this.stuid=stuid;

}

public

string

getstuid(){

return

stuid;

}

public

void

setstuname(string

stuname){

this.stuname=stuname;

}

public

string

getstuname(){

return

stuname;

}

public

void

setstusex(char

stusex){

this.stusex=stusex;

}

public

char

getstusex(){

return

stusex;

}

public

void

setstuage(int

stuage){

this.stuage=stuage;

}

public

int

getstuage(){

return

stuage;

}

/**

*构造方法,构造学生信息

*/

public

student(string

stuid,string

stuname,char

stusex,int

stuage){

this.stuid=stuid;

this.stuname=stuname;

this.stusex=stusex;

this.stuage=stuage;

}

public

string

tostring(){//覆盖该类的tostring()方法

stringbuffer

buff=new

stringbuffer();

buff.append(“学号:”+stuid);

buff.append(“\n姓名:”+stuname);

buff.append(“\n性别:”+stusex);

buff.append(“\n年龄:”+stuage);

return

buff.tostring();

}

public

static

void

main(string[]

args){

student

stu=new

student(“1000″,”zhangsan”,’男’,18);

system.out.println

(stu);//打印学生信息

system.out.println

(“–修改姓名结果–“);

stu.setstuname(“lisi”);

system.out.println

(stu);

}

}

很详细的帮你写下,呵呵,所以要给分哦!

1、

(1)源程序如下:

public class One {

public static void main(String[] args) {

String name = “张三”;

int age = 23;

char sex = ‘男’;

String myclass = “某某专业2班”;

System.out.println(“姓名:” + name);

System.out.println(“姓名:” + age);

System.out.println(“姓名:” + sex);

System.out.println(“姓名:” + myclass);

}

}

(2)

编写完程序的后缀名是.java,如本题,文件名就是One.java。

开始\运行\cmd,进入“命令提示符窗口”,然后用javac编译器编译.java文件,语句:javac One.java。

(3)

编译成功后,生成的文件名后缀是.class,叫做字节码文件。再用java解释器来运行改程序,语句:java One

2、编写程序,输出1到100间的所有偶数

(1)for语句

public class Two1 {

public static void main(String[] args) {

for(int i=2;i=100;i+=2)

System.out.println(i);

}

}

(2)while语句

public class Two2 {

public static void main(String[] args) {

int i = 2;

while (i = 100) {

System.out.println(i);

i += 2;

}

}

}

(3)do…while语句

public class Two3 {

public static void main(String[] args) {

int i = 2;

do {

System.out.println(i);

i += 2;

}while(i=100);

}

}

3、编写程序,从10个数当中找出最大值。

(1)for循环

import java.util.*;

public class Three1 {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

int number;

int max = 0;

for (int i = 0; i 10; i++) {

System.out.print(“输入第” + (i + 1) + “个数:”);

number = input.nextInt();

if (max number)

max = number;

}

System.out.println(“最大值:” + max);

}

}

(2)while语句

import java.util.*;

public class Three2 {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

int number;

int max = 0;

int i = 0;

while (i 10) {

System.out.print(“输入第” + (i + 1) + “个数:”);

number = input.nextInt();

if (max number)

max = number;

i++;

}

System.out.println(“最大值:” + max);

}

}

(3)do…while语句

import java.util.*;

public class Three3 {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

int number;

int max = 0;

int i = 0;

do {

System.out.print(“输入第” + (i + 1) + “个数:”);

number = input.nextInt();

if (max number)

max = number;

i++;

}while(i10);

System.out.println(“最大值:” + max);

}

}

4、编写程序,计算从1到100之间的奇数之和。

(1)for循环

public class Four1 {

public static void main(String[] args) {

int sum=0;

for(int i = 1;i=100;i+=2){

sum+=i;

}

System.out.println(“1~100间奇数和:” + sum);

}

}

(2)while语句

public class Four2 {

public static void main(String[] args) {

int sum = 0;

int i = 1;

while (i = 100) {

sum += i;

i += 2;

}

System.out.println(“1~100间奇数和:” + sum);

}

}

(3)do…while语句

public class Four3 {

public static void main(String[] args) {

int sum = 0;

int i = 1;

do {

sum += i;

i += 2;

} while (i = 100);

System.out.println(“1~100间奇数和:” + sum);

}

}

5、

(1)什么是类的继承?什么是父类?什么是子类?举例说明。

继承:是面向对象软件技术当中的一个概念。如果一个类A继承自另一个类B,就把这个A称为”B的子类”,而把B称为”A的父类”。继承可以使得子类具有父类的各种属性和方法,而不需要再次编写相同的代码。在令子类继承父类的同时,可以重新定义某些属性,并重写某些方法,即覆盖父类的原有属性和方法,使其获得与父类不同的功能。另外,为子类追加新的属性和方法也是常见的做法。继承需要关键字extends。举例:

class A{}

class B extends A{}

//成员我就不写了,本例中,A是父类,B是子类。

(2)编写一个继承的程序。

class Person {

public String name;

public int age;

public char sex;

public Person(String n, int a, char s) {

name = n;

age = a;

sex = s;

}

public void output1() {

System.out.println(“姓名:” + name + “\n年龄:” + age + “\n性别:” + sex);

}

}

class StudentPerson extends Person {

String school, department, subject, myclass;

public StudentPerson(String sc, String d, String su, String m, String n,

int a, char s) {

super(n, a, s);

school = sc;

department = d;

subject = su;

myclass = m;

}

public void output2() {

super.output1();

System.out.println(“学校:” + school + “\n系别:” + department + “\n专业:”

+ subject + “\n班级:” + myclass);

}

}

public class Five2 {

public static void main(String[] args) {

StudentPerson StudentPersonDemo = new StudentPerson(“某某大学”, “某某系别”,

” 某专业”, “某某班级”, ” 张三”, 23, ‘男’);

StudentPersonDemo.output2();

}

}

import java.text.ParseException;

import java.text.SimpleDateFormat;

//日期类

public class Date {

private String year;

private String month;

private String day;

public Date(String year, String month, String day) {

this.year = year;

this.month = month;

this.day = day;

}

public void format(){

System.out.println(day + “/” + month + “/” + year);

}

public void calculate(){

SimpleDateFormat sdf = new SimpleDateFormat(“yyyy/MM/dd”);

try {

java.util.Date startDate = sdf.parse(year + “/” + “01” + “/” + “01”);

java.util.Date inputDate = sdf.parse(year + “/” + month + “/” + day);

long resultDay = (inputDate.getTime() – startDate.getTime())/(24 * 1000 * 60 * 60);

System.out.println(“第” + (resultDay + 1) + “天”);

} catch (ParseException e) {

e.printStackTrace();

}

}

}

//测试类

public class Test {

public static void main(String[] args) {

Date date1 = new Date(“2020″,”04″,”11”);

Date date2 = new Date(“2020″,”01″,”02”);

date1.format();

date1.calculate();

date2.format();

date2.calculate();

}

}

你要编译的文件写错了,应该是javac ComputeKilomters.java

还有常量要用final标识符修饰final double KILOMETERS_PRE_MILE

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