java练习题求完整代码

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","赵六",73.5)

sArray[4]=new Student("005","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())

}

}

}

1

import java.util.Scanner

public class test1 {

private static Scanner input= new Scanner(System.in) 

public static void main(String[] args){

long num

do{

System.out.print("\nInput your num: ")

num=input.nextLong()

}while(num<10000||num>99999)

num=num/100

num*=100

System.out.println("\nThis is num: "+num)

}

}

2.

import java.util.Scanner

public class test2 {

private static Scanner input= new Scanner(System.in) 

public static void main(String[] args){

long num

do{

System.out.print("\nInput your num: ")

num=input.nextLong()

}while(num<0||num>1000)

int sum=0

while(num>0){

sum+=num%10

num/=10

}

System.out.println("\nThis is sum: "+sum)

}

}

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