2018/12/11
1.設計一個類Student,該類包括姓名、學號和成績。設計一個方法,按照成績從高到低的順序輸出姓名、學號和成績信息。
public class Student {
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getID() {
return ID;
}
public void setID(int nomber) {
this.ID = ID;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
private String name;
private int ID;
private int score;
Student(){
}
public Student(String name, int ID, int score) {
this.name = name;
this.ID = ID;
this.score = score;
}
void show(){
System.out.println("id:"+ID+"姓名:"+name+"成績:"+score);
}
public static void sort(Student [] stu){
Student s;
for(int i =0;i<stu.length-1;i++){
for(int j =0;j<stu.length-i-1;i++){
if(stu[i].getScore()<stu[i+1].getScore()){
s=stu[i] ;
stu[i]=stu[i+1];
stu[i+1] = s;
}
}
}
}
}
主函數
Student s = new Student();
Student [] stu = new Student[3];
stu[0] = new Student("zhang",1,73);
stu[1] = new Student("li",2,95);
stu[2] = new Student("zhang",3,84);
stu[2].sort(stu);
for(Student stus:stu){
stus.show();
}
2定義一個汽車類Vehicle,要求如下:[選做題]
2.1屬性包括:汽車品牌brand(String類型)、顏色color(String類型)和速度speed(double類型),並且所有屬性爲私有。
2.2至少提供一個有參的構造方法(要求品牌和顏色可以初始化爲任意值,但速度的初始值必須爲0)。
2.3爲私有屬性提供訪問器方法。注意:汽車品牌一旦初始化之後不能修改。
2.4定義一個一般方法run(),用打印語句描述汽車奔跑的功能
2.5定義測試類VehicleTest,在其main方法中創建一個品牌爲“benz”、顏色爲“black”的汽車。
private String brand;
private String color;
private double speed;
public String getBrand() {
return brand;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public double getSpeed() {
return speed;
}
public void setSpeed(double speed) {
this.speed = speed;
}
public Vehicle(String brand, String color) {
this.brand = brand;
this.color = color;
}
void run(double speed){
this.speed = speed;
System.out.println(color+"色的"+brand+"速度是"+speed);
}
主函數
Scanner s = new Scanner(System.in);
Vehicle v = new Vehicle("黑","benz");
v.run(100);