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题目:
java 使用面向对象方式实现录入学生信息,取出成绩最大值、最小值、平均值、对其进行排序
gitup源码下载地址:
https://github.com/benxiaohai8888/Javase/blob/master/ObjectStudent.java
代码:
- import java.util.Scanner;
- public class ObjectStudent{
- private String name;//姓名
- private int age;//年龄
- private double score;//分数
- //定义全局的变量
- private Student[] students;
-
- public void setName(String name){
- this.name=name;
- }
- public String getName(){
- return name;
- }
- public void setAge(int age)
- {
- this.age=age;
- }
- public int getAge(){
- return age;
- }
-
- public void setScore(double score)
- {
- this.score=score;
- }
- public double getScore(){
- return score;
- }
-
- //初始化学生
- public void initStudent(){
- Scanner scanner=new Scanner(System.in);
- students=new Student[3];
- System.out.println("--------输入3个学生的信息--------");
- int j=1;
- for(int i=0;i<students.length;i++){
-
- Student stu=new Student();
-
- System.out.println("输入第["+j+"]个学生的信息:");
- System.out.println("姓名:");
- stu.setName(scanner.next());
-
- System.out.println("年龄:");
- stu.setAge(scanner.nextInt());
-
- System.out.println("分数:");
- stu.setScore(scanner.nextDouble());
-
- students[i]=stu;
- j++;
- }
- //打印输出
- for(int a=0;a<students.length;a++){
- Student stu=students[a];
- System.out.println("第["+(a+1)+"]个学生的姓名:"+stu.getName());
- System.out.println("第["+(a+1)+"]个学生的年龄:"+stu.getAge());
- System.out.println("第["+(a+1)+"]个学生的分数:"+stu.getScore());
- System.out.println("----------------------------------------");
- }
- }
-
- //总分
- public double sumScore(){
- double sumScore=0.0;
- for(int a=0;a<students.length;a++){
- Student stu=students[a];
- sumScore+=stu.getScore();
- }
- return sumScore;
- }
-
- //平均分
- public double avgScore(){
- return sumScore()/students.length;
- }
-
- //最大值
- public double max(){
- double max=students[0].getScore();
- for(int a=0;a<students.length;a++){
- if(students[a].getScore()>max){
- max=students[a].getScore();
- }
-
- }
- return max;
-
- }
- //最大值的学生
- public Student maxStudent(){
- double max=students[0].getScore();
- int index=-1;
- for(int a=0;a<students.length;a++){
- if(students[a].getScore()>max){
- max=students[a].getScore();
- index=a;
- }
-
- }
- return students[index];
-
- }
- //最小值
- public double min(){
- double min=students[0].getScore();
- for(int a=0;a<students.length;a++){
- if(students[a].getScore()<min){
- min=students[a].getScore();
- }
-
- }
- return min;
-
- }
- //最小值的学生
- public Student minStudent(){
- double min=students[0].getScore();
- int index=-1;
- for(int a=0;a<students.length;a++){
- if(students[a].getScore()<min){
- min=students[a].getScore();
- index=a;
- }else{
- min=students[0].getScore();
- index=0;
- }
-
- }
- return students[index];
-
- }
- //排序
- public void sort(){
- Student st=new Student();
- for(int i=0;i<students.length-1;i++){
- for(int j=i+1;j<students.length-1;j++){
- if(students[i].getScore() > students[j].getScore()){
- st=students[i];
- students[i]=students[j];
- students[j]=st;
- }
- }
- }
-
- for(Student s: students){
- System.out.print("姓名:"+s.getName()+" ");
- System.out.print("年龄:"+s.getAge()+" ");
- System.out.print("分数:"+s.getScore()+" ");
- System.out.println();
- }
-
- }
-
- public static void main(String[] args){
- Student stu=new Student();
- //初始化学生
- stu.initStudent();
- //总分
- System.out.println("总分: "+stu.sumScore());
- //平均分
- System.out.println("平均分: "+stu.avgScore());
- //分数最大值
- System.out.println("最大值: "+stu.max());
- //分数最大值的学生信息
- System.out.println("分数最大值的学生姓名: "+stu.maxStudent().getName());
- //分数最小值
- System.out.println("最小值: "+stu.min());
- //分数最小值的学生信息
- System.out.println("分数最小值的学生姓名: "+stu.minStudent().getName());
- //排序
- System.out.println("排序结果; ");
- stu.sort();
-
-
- }
- }
结果:
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