按照题目要求编写的用javaBean规范设计的学生类Student的Java程序如下
需要创建user.java.test包,把Student.java文件和Test.java文件放入包中,编译Student.java文件并且编译运行Test.java文件得到运行结果
Student.java文件扮租代码如下
package user.java.test
import java.io.Serializable
public class Student implements Serializable{
private static final long serialVersionUID = 1L
private String no
private String name
private double score
public Student(){}
public Student(String no,String name,double score){
this.no=no
this.name=name
this.score=score
}
public String getNo(){ return no}
public void setNo(String no){ this.no=no}
public String getName(){ return name}
public void setName(String name){ this.name=name}
public double getScore(){ return score}
public void setScore(double score){ this.score=score}
public String toString(){
return "学号:"+no+",姓名:"+name+",成绩:"+score
}
public static double getAvg(Student[] sArray){
double sum=0,avg
for(int i=0i<sArray.lengthi++){
sum=sum+sArray[i].getScore()
}
avg=sum/sArray.length
return avg
}
}
Test.java文件代码如下
package user.java.test
public class Test{
public static void main(String[] args){
Student[] sArray=new Student[5]
sArray[0]=new Student("001","张三",89.5)
sArray[1]=new Student("002","李四",82.5)
sArray[2]=new Student("003","王五",93)
sArray[3]=new Student("004"皮缺和,"赵六",73.5)
sArray[4]=new Student("005","燃盯孙七",66)
System.out.println("这些学生的平均分:"+Student.getAvg(sArray))
for(int i=0i<sArray.lengthi++){
System.out.println(sArray[i].toString())
}
}
}
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解释器冲搜纳来运行改程序,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=2i<=100i+=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语漏芹句
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个数当中找出最大散没值。
(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 = 0i <10i++) {
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(i<10)
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 = 1i<=100i+=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.util.Scannerpublic class Test1 {
/**
* 本息计算方州顷做式:册衡本金+本金×年利率×多少年
*/
public static void main(String[] args) {
Scanner cin = new Scanner(System.in)
System.out.println("请输入本金数:")
double ben = cin.nextDouble()
System.out.println("请输入乎缓存款年数:")
int year = cin.nextInt()
double benxi = 0
if(year==1)
benxi = ben*(1+2.25/100.0)
else if(year==2)
benxi = ben*(1+2.7/100.0)
else if(year==3)
benxi = ben*(1+3.24/100.0)
else if(year==5)
benxi = ben*(1+3.6/100.0)
System.out.println("银行需要支付的本息是:"+benxi)
}
}
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