学生信息java代码

1. 求java中类似学生信息管理系统中按学号，按姓名排序的代码

importjava.util.ArrayList;
importjava.util.Collections;
importjava.util.Comparator;
importjava.util.List;

publicclassSort{
	publicstaticvoidmain(String[]args){
		Studentp1=newStudent(1001,"小明",20);
		Studentp2=newStudent(1002,"小红",21);
		Studentp3=newStudent(1003,"小黑",19);
		List<Student>list=newArrayList<Student>();
		list.add(p1);
		list.add(p2);
		list.add(p3);
		Collections.sort(list,newComparator<Student>(){
			/*
			*intcompare(Studento1,Studento2)返回一个基本类型的整型，返回负数表示：o1小于o2，
			*返回0表示：o1和o2相等，返回正数表示：o1大于o2。
			*/
			publicintcompare(Studento1,Studento2){
				//按照学生的学号进行升序排列
				if(o1.getId()>o2.getId()){
					return1;
				}
				if(o1.getId()==o2.getId()){
					return0;
				}
				return-1;
			}
		});
		write(list);
		System.out.println("---------------------");
		Collections.sort(list,newComparator<Student>(){
			/*
			*intcompare(Studento1,Studento2)返回一个基本类型的整型，返回负数表示：o1小于o2，
			*返回0表示：o1和o2相等，返回正数表示：o1大于o2。
			*/
			publicintcompare(Studento1,Studento2){
				//按照学生的年龄进行升序排列
				if(o1.getAge()>o2.getAge()){
					return1;
				}
				if(o1.getAge()==o2.getAge()){
					return0;
				}
				return-1;
			}
		});
		write(list);
	}

	publicstaticvoidwrite(List<Student>list){
		for(Students:list){
			System.out.println(s.getId()+"	"+s.getName()+"	"
					+s.getAge());
		}

	}

}


publicclassStudent{
	privateintid;
	privateStringname;
	privateintage;
	//构造方法
	publicStudent(intid,Stringname,intage){
		this.id=id;
		this.name=name;
		this.age=age;
	}
	
	publicintgetId(){
		returnid;
	}
	publicvoidsetId(intid){
		this.id=id;
	}
	publicStringgetName(){
		returnname;
	}
	publicvoidsetName(Stringname){
		this.name=name;
	}
	publicintgetAge(){
		returnage;
	}
	publicvoidsetAge(intage){
		this.age=age;
	}
}

2. .给出存储班级三十名学生基本信息的Java代码，基本信息的具体赋值由考生自拟

下面是一个存储班级三十名学生基本信息的 Java 代码示例：
import java.util.ArrayList;
public class Student {
private String name;
private int age;
private String gender;
public Student(String name, int age, String gender) {
this.name = name;
this.age = age;
this.gender = gender;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getGender() {
return gender;
}
}
public class Classroom {
private ArrayList<Student> students;
public Classroom() {
this.students = new ArrayList<Student>();
}
public void addStudent(Student student) {
students.add(student);
}
public ArrayList<Student> getStudents() {
return students;
}
}
public class Main {
public static void main(String[] args) {
Classroom classroom = new Classroom();
// 添加 30 名学生的基本信息
classroom.addStudent(new Student("Tom", 18, "Male"));
classroom.addStudent(new Student("Alice", 19, "Female"));
// ...
// 此处省略 28 名学生的信息
// 获取所有学生的信息
ArrayList<Student> students = classroom.getStudents();
for (Student student : students) {
System.out.println("Name: " + student.getName());
System.out.println("Age: " + student.getAge());
System.out.println("Gender: " + student.getGender());
}
}
}
该代码定义了两个类：Student 类表示一个学生，包含了学生的姓名、年龄和性别等信息；Classroom 类表示一个班级，包含了一个学生的列表，并提供了添加学生和获取学生列表的方法。
在 Main 类的 main 方法中，我们首先实例化一个 Classroom 对象，然后依次添加 30 名学生的信息。最后，我们调用 getStudents 方法获取所

3. java定义一个表示学生信息的类

publicclassStudent{
/*
*(non-Javadoc)
*
*@seejava.lang.Object#toString()
*/
@Override
publicStringtoString(){
return"StudentInfo
[No="+sNo+",Name="+sName+",Sex="+sSex
+",Age="+sAge+",Java="+sJava+"]";
}

/**
*@paramsJava
*thesJavatoset
*/
publicvoidsetsJava(intsJava){
this.sJava=sJava;
}

/**
*@paramsNo
*@paramsName
*@paramsSex
*@paramsAge
*@paramsJava
*/
publicStudent(StringsNo,StringsName,StringsSex,intsAge,intsJava){
super();
this.sNo=sNo;
this.sName=sName;
this.sSex=sSex;
this.sAge=sAge;
this.sJava=sJava;
}

/**
*@returnthesNo
*/
publicStringgetsNo(){
returnsNo;
}

/**
*@returnthesName
*/
publicStringgetsName(){
returnsName;
}

/**
*@returnthesSex
*/
publicStringgetsSex(){
returnsSex;
}

/**
*@returnthesAge
*/
publicintgetsAge(){
returnsAge;
}

/**
*@returnthesJava
*/
publicintgetsJava(){
returnsJava;
}

privateStringsNo;
privateStringsName;
privateStringsSex;
privateintsAge;
privateintsJava;

}

publicclassTestStudent{
publicstaticvoidgetAverage(floatjava[]){
intn=0;
floatsum=0;
while(n<java.length){
sum+=java[n];
n++;
}
System.out.println("Average="+sum/java.length);
}

publicstaticvoidgetMaxMin(floatjava[]){
floatmax=java[0],min=java[0];
for(intn=0;n<java.length;n++){
if(java[n]>max){
max=java[n];
}
if(java[n]<min){
min=java[n];
}
}
System.out.println("Max="+max+";Min="+min);
}

publicstaticvoidprintInfo(Strings[]){
for(Stringa:s){
System.out.println(a);
}
};

publicstaticvoidmain(String[]args){
Students1=newStudent("s1","Zhao","male",16,11);
Students2=newStudent("s2","Qian","female",16,10);
Students3=newStudent("s3","Sun","male",16,30);
Students4=newStudent("s4","Li","female",16,40);
Students5=newStudent("s5","Zhou","male",16,50);

String[]sInfo={s1.toString(),s2.toString(),s3.toString(),
s4.toString(),s5.toString()};
float[]iJava={s1.getsJava(),s2.getsJava(),s3.getsJava(),
s4.getsJava(),s5.getsJava()};
printInfo(sInfo);
getAverage(iJava);
getMaxMin(iJava);
}

}

4. Java实现学生简易信息管理系统

importjava.util.*;
importjava.io.*;

classStuMgr{

	publicstaticclassStudent{
	
		publicintid;
		publicStringname;
		publicintage;
		
		publicStudent(intid,Stringname,intage){
			this.id=id;
			this.name=name;
			this.age=age;
		}
		
		@Override
		publicStringtoString(){
			returnid+","+name+","+age;
		}
	}
	
	publicList<Student>stuList=newLinkedList<>();
	
	publicvoidadd(){
		Scannersc=newScanner(System.in);
		System.out.println("请输入学生学号：");
		Stringid=sc.nextLine();
		intintId=0;
		try{
			intId=Integer.parseInt(id);
		}catch(NumberFormatExceptionex){
			System.out.println("学号输入有误，请输入数字！");
			return;
		}
		if(find(intId)!=null){
			System.out.println("该学号已经存在！");
			return;
		}
		System.out.println("请输入学生姓名：");
		Stringname=sc.nextLine();
		System.out.println("请输入学生年龄：");
		Stringage=sc.nextLine();
		intintAge=0;
		try{
			intAge=Integer.parseInt(age);
		}catch(NumberFormatExceptionex){
			System.out.println("年龄输入有误，请输入数字！");
			return;
		}
		Studentstu=newStudent(intId,name,intAge);
		stuList.add(stu);
		store();
		System.out.println("-----------------------");
		System.out.println("学生信息已增加");
		System.out.println(stu);
		System.out.println("-----------------------");
	}
	
	publicvoiddel(){
		Scannersc=newScanner(System.in);
		System.out.println("请输入学生学号：");
		Stringid=sc.nextLine();
		intintId=0;
		try{
			intId=Integer.parseInt(id);
		}catch(NumberFormatExceptionex){
			System.out.println("学号输入有误，请输入数字！");
			return;
		}
		Studentstu=find(intId);
		if(stu==null){
			System.out.println("该学号不存在！");
			return;
		}
		stuList.remove(stu);
		store();
		System.out.println("-----------------------");
		System.out.println("学生信息已删除");
		System.out.println(stu);
		System.out.println("-----------------------");
	}
	
	publicvoidfind(){
		Scannersc=newScanner(System.in);
		System.out.println("请输入学生学号：");
		Stringid=sc.nextLine();
		intintId=0;
		try{
			intId=Integer.parseInt(id);
		}catch(NumberFormatExceptionex){
			System.out.println("学号输入有误，请输入数字！");
			return;
		}
		Studentstu=find(intId);
		if(stu==null){
			System.out.println("该学号不存在！");
			return;
		}
		System.out.println("-----------------------");
		System.out.println("查找学生信息如下");
		System.out.println(stu);
		System.out.println("-----------------------");
	}
	
	publicStudentfind(intid){
		for(Studentstu:stuList){
			if(stu.id==id){
				returnstu;
			}
		}
		returnnull;
	}
	
	publicvoidmodify(){
		store();
	}
	
	publicvoidforeach(){
		System.out.println("-----------------------");
		for(Studentstu:stuList){
			System.out.println(stu);
		}
		System.out.println("-----------------------");
	}
	
	publicvoidstore(){
		Iteratoriterator=stuList.iterator();
		Filefile=newFile("stuList.txt");
FileWriterfw=null;
BufferedWriterwriter=null;
try{
fw=newFileWriter(file);
writer=newBufferedWriter(fw);
while(iterator.hasNext()){
writer.write(iterator.next().toString());
writer.newLine();//换行
}
writer.flush();
}catch(FileNotFoundExceptione){
e.printStackTrace();
}catch(IOExceptione){
e.printStackTrace();
}finally{
try{
writer.close();
fw.close();
}catch(IOExceptione){
e.printStackTrace();
}
}
	}
	
	publicstaticvoidmain(String[]args){
		StuMgrmgr=newStuMgr();
		while(true){
			System.out.println("请选择您要进行的操作：");
			System.out.println("1：增加学生信息");
			System.out.println("2：删除学生信息");
			System.out.println("3：查找学生信息");
			System.out.println("4：修改学生信息");
			System.out.println("5：遍历学生信息");
			System.out.println("6：退出");
			System.out.println("-----------------------");
			Scannersc=newScanner(System.in);
			Stringop=sc.nextLine();
			if("6".equals(op)){
				return;
			}
			if("1".equals(op)){
				mgr.add();
			}
			if("2".equals(op)){
				mgr.del();
			}
			if("3".equals(op)){
				mgr.find();
			}
			if("4".equals(op)){
				mgr.modify();
			}
			if("5".equals(op)){
				mgr.foreach();
			}
		}
		
	}
}

时间仓促，还有一个modify方法没实现，留给你自己练手。

5. 要求编写一个java程序，输入学生信息，并能保存与显示学生信息。

import java.util.ArrayList;import java.util.Scanner;import com.sun.org.apache.xpath.internal.Arg;public class Student { //两个私有属性 private int no ; private String name ; //默认构造函数 public Student(){} //带参构造函数 public Student(int no,String name){ this.no=no; this.name=name; } //添加学生信息 public void addStudentInfo(ArrayList list){ String flag1="yes"; do{ Student student=new Student(); Scanner in =new Scanner(System.in); System.out.println("请输入学生学号："); student.setNo(in.nextInt()); System.out.println("请输入学生姓名："); student.setName(in.next()); list.add(student); System.out.println("是否继续添加学生信息(yes/no)?"); flag1=in.next(); } while(flag1.equals("yes")); } //读取学生信息 public void showStudentInfo(ArrayList<Student> list){ System.out.println(" 学生no： "+" 学生name: "); for(Student student:list){ System.out.println(" "+student.getNo()+" "+student.getName()); } } public int getNo() { return no; } public void setNo(int no) { this.no = no; } public String getName() { return name; } public void setName(String name) { this.name = name; } public static void main(String arg[]) { ArrayList<Student> studentList= new ArrayList<Student>(); Student student= new Student(); Scanner inn= new Scanner(System.in); while(true){ System.out.println("----------------- 欢迎使用学生管理系统------------------"); System.out.println("1.输入学生信息"); System.out.println("2.显示学生信息"); System.out.println("0.退出系统"); System.out.println("请选择...."); int nn= inn.nextInt(); switch (nn) { case 1: student.addStudentInfo(studentList); break; case 2: System.out.println("学生信息如下："); student.showStudentInfo(studentList); break; case 0: System.exit(0); System.out.println("系统退出！"); break; default: break; } } } }

6. JAVA:定义一个表示学生信息的类student

1.Bean
package com.test;

public class Student {
private String sSO;//学号
private String sName;//姓名
private String sSex;//性别
private String sAge;//年龄
private String sJava;//成绩
public String getSSO() {
return sSO;
}
public void setSSO(String sso) {
sSO = sso;
}
public String getSName() {
return sName;
}
public void setSName(String name) {
sName = name;
}
public String getSSex() {
return sSex;
}
public void setSSex(String sex) {
sSex = sex;
}
public String getSAge() {
return sAge;
}
public void setSAge(String age) {
sAge = age;
}
public String getSJava() {
return sJava;
}
public void setSJava(String java) {
sJava = java;
}
}

2.测试类
package com.test;

public class textStudent {

/**
* @param args
*/
public static void main(String[] args) {
Student s1 = new Student();//学生对象一
Student s2 = new Student();//学生对象二
//学生一信息
s1.setSName("Tom");
s1.setSSO("1001002");
s1.setSAge("18");
s1.setSSex("男");
s1.setSJava("89");
//学生二信息
s2.setSName("Lucy");
s2.setSSO("1001001");
s2.setSAge("19");
s2.setSSex("女");
s2.setSJava("90");

System.out.println("两名学生的信息如下：");
System.out.println("学号\t姓名\t年龄\t性别\t成绩");
System.out.println(s1.getSSO()+"\t"+s1.getSName()+"\t"+s1.getSAge()+"\t"+s1.getSSex()+"\t"+s1.getSJava());
System.out.println(s2.getSSO()+"\t"+s2.getSName()+"\t"+s2.getSAge()+"\t"+s2.getSSex()+"\t"+s2.getSJava());
System.out.println();
int sj1 = Integer.parseInt(s1.getSJava());
int sj2 = Integer.parseInt(s2.getSJava());
double sum = (sj1+sj2)/2.0;//保留一位小数
System.out.println("平均成绩为:"+sum);
}

}