Examination & TestExa >> Interface trong java >> Java basic
1. Tạo 1 lớp giao diện IInfor chứa hàm showInfor
2. Tạo lớp đối tượng People gồm các thuộc tính tên, tuổi, địa chỉ kế thừa từ lớp IInfor
- Tạo hàm input
Tạo lớp Car gồm các thuộc tính tên và màu -> kế thừa từ lớp IInfor
- Tạo hàm input
Viết code cho các lớp trên.
3. Trọng phương thức main của lớp Test tạo 2 đối tượng People và Car.
- tạo phương thức như sau.
public static void showInfor(ArrayList<IInfor> a) -> hàm này hiển thị thông tin tất cả đối tượng.
Viết chương trình và sử dụng hàm showInfor trong phương thức main.
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Phản hồi từ học viên
5
(Dựa trên đánh giá ngày hôm nay)
![Nguyễn Việt Hoàng [community,AAHN-C2009G]](https://www.gravatar.com/avatar/bdbde8074d82148dcda6927ccb016466.jpg?s=80&d=mm&r=g)
Nguyễn Việt Hoàng
2021-09-21 13:48:23
#Car.java
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package Info;
import java.util.Scanner;
/**
*
* @author DELL
*/
public class Car implements Info {
private String name ;
private String color;
public Car(){
}
public Car(String name, String color){
this.name = name;
this.color = color;
}
public String getName(){
return this.name;
}
public String getColor(){
return this.color;
}
public void setName(String name){
this.name = name;
}
public void setColor(String color){
this.color = color;
}
public void input(){
Scanner sc = new Scanner(System.in);
System.out.println("Enter name :");
String name = sc.nextLine();
System.out.println("Enter color :");
String color = sc.nextLine();
setName(name);
setColor(color);
}
@Override
public void showInfo(){
System.out.println("Name :" + this.getName()
+ ", Color :" + this.getColor());
}
}
#Info.java
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package Info;
/**
*
* @author DELL
*/
public interface Info {
public void showInfo();
}
#People.java
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package Info;
import java.util.Scanner;
/**
*
* @author DELL
*/
public class People implements Info {
private String name;
private int age;
private String address;
public People() {
}
public People(String name, int age, String address) {
this.name = name;
this.age = age;
this.address = address;
}
public String getName() {
return this.name;
}
public int getAge() {
return this.age;
}
public String getAddress() {
return this.address;
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
public void setAddress(String address) {
this.address = address;
}
public void input() {
Scanner sc = new Scanner(System.in);
System.out.println("Enter name :");
String name = sc.nextLine();
System.out.println("Enter Age :");
int age = sc.nextInt();
System.out.println("Enter address :");
String address = sc.nextLine();
setName(name);
setAge(age);
setAddress(address);
}
@Override
public void showInfo() {
System.out.println("Name :" + this.getName()
+ ", Age :" + this.getAge()
+ ", Address :" + this.getAddress());
}
;
}
#test.java
/*
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*/
package Info;
import java.util.ArrayList;
/**
*
* @author DELL
*/
public class test {
public static void showInfo(ArrayList<Info> a) {
// ArrayList<Info> = new ArrayList<>();
// System.out.println(a);
}
public static void main(String[] args) {
}
}
![Hoàng Thiện Thanh [community,AAHN-C2009G]](https://www.gravatar.com/avatar/58e377dde293f6da38c0b5168578557a.jpg?s=80&d=mm&r=g)
Hoàng Thiện Thanh
2021-09-21 11:45:02
#Car.java
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package test30;
import java.util.Scanner;
/**
*
* @author anhoa
*/
public class Car implements IInfor{
private String name;
private String color;
public Car(){
}
public Car(String name, String color){
this.name = name;
this.color = color;
}
public void setName(String name){
this.name = name;
}
public void setColor(String color){
this.color = color;
}
public void input(){
System.out.println("Please enter input for new Car: ");
Scanner sc = new Scanner(System.in);
String name = sc.nextLine();
sc = new Scanner(System.in);
String color = sc.nextLine();
setName(name);
setColor(color);
}
@Override
public String toString(){
return "[Name: " + name + ", Color: " + color + "]";
}
@Override
public void showInfor(){
System.out.println("Name: " + this.name);
System.out.println("Color: " + this.color);
}
}
#IInfor.java
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package test30;
/**
*
* @author anhoa
*/
public interface IInfor {
void showInfor();
}
#People.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package test30;
import java.util.Scanner;
/**
*
* @author anhoa
*/
public class People implements IInfor{
private String name;
private int age;
private String address;
public People(){
}
public People(String name, int age, String address){
this.name = name;
this.age = age;
this.address = address;
}
public String getName(){
return this.name;
}
public int getAge(){
return this.age;
}
public String getAddress(){
return this.address;
}
public void setName(String name){
this.name = name;
}
public void setAge(int age){
this.age = age;
}
public void setAddress(String address){
this.address = address;
}
public void input(){
System.out.println("Please enter input for new People:");
Scanner sc = new Scanner(System.in);
String name = sc.nextLine();
sc = new Scanner(System.in);
int age = sc.nextInt();
sc = new Scanner(System.in);
String address = sc.nextLine();
//new People(name, age, address);
setName(name);
setAge(age);
setAddress(address);
}
@Override
public String toString(){
return "[Name: " + name + ", Age: " + age + ", Address: " + address + "]";
}
@Override
public void showInfor(){
System.out.println("Name: " + this.name);
System.out.println("Age: " + this.age);
System.out.println("Address: " + this.address);
}
}
#Test30.java
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package test30;
import java.util.ArrayList;
/**
*
* @author anhoa
*/
public class Test30 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
People entityA = new People();
Car entityB = new Car();
entityA.input();
entityB.input();
ArrayList<IInfor> all = new ArrayList<>();
all.add(entityA);
all.add(entityB);
showInfor(all);
}
public static void showInfor(ArrayList<IInfor> a){
System.out.println(a);
};
}
![Nam20021608 [community]](https://www.gravatar.com/avatar/0b1940debe745e5d5db19e96d6e57811.jpg?s=80&d=mm&r=g)
![Hieu Ngo [community,C2009G]](https://www.gravatar.com/avatar/cee2973101b9cf9580ef561ff3eeecf0.jpg?s=80&d=mm&r=g)
Hieu Ngo
2021-08-31 04:36:03
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Test {
public static void main(String [] args) {
People people = new People();
Car car = new Car();
ArrayList<People> peoples = new ArrayList<>();
people.input();
peoples.add(people);
ArrayList<Car> cars = new ArrayList<>();
car.input();
cars.add(car);
for(People people1 : peoples) {
System.out.println(people1.showInfor());
}
for(Car car1 : cars) {
System.out.println(car1.showInfor());
}
}
}
![Hieu Ngo [community,C2009G]](https://www.gravatar.com/avatar/cee2973101b9cf9580ef561ff3eeecf0.jpg?s=80&d=mm&r=g)
Hieu Ngo
2021-08-31 04:35:40
import java.util.Scanner;
public class Car implements IInfor {
private String tenXe;
private String mau;
public Car() {
}
public Car(String tenXe, String mau) {
this.tenXe = tenXe;
this.mau = mau;
}
public Scanner getScanner() {
return new Scanner(System.in);
}
public String getTenXe() {
return tenXe;
}
public void setTenXe(String tenXe) {
this.tenXe = tenXe;
}
public String getMau() {
return mau;
}
public void setMau(String mau) {
this.mau = mau;
}
public void input() {
System.out.println("Nhap ten xe");
this.tenXe = getScanner().nextLine();
System.out.println("Nhap mau");
this.mau = getScanner().nextLine();
}
@Override
public String showInfor() {
return String.format("Ten xe: %s, Mau xe: %s",this.tenXe,this.mau);
}
}
![Hieu Ngo [community,C2009G]](https://www.gravatar.com/avatar/cee2973101b9cf9580ef561ff3eeecf0.jpg?s=80&d=mm&r=g)
Hieu Ngo
2021-08-31 04:34:40
import java.util.Scanner;
public class People implements IInfor {
private String ten;
private int tuoi;
private String diachi;
public People() {
}
public People(String ten, int tuoi, String diachi) {
this.ten = ten;
this.tuoi = tuoi;
this.diachi = diachi;
}
public Scanner getScanner() {
return new Scanner(System.in);
}
public String getTen() {
return ten;
}
public void setTen(String ten) {
this.ten = ten;
}
public int getTuoi() {
return tuoi;
}
public void setTuoi(int tuoi) {
this.tuoi = tuoi;
}
public String getDiachi() {
return diachi;
}
public void setDiachi(String diachi) {
this.diachi = diachi;
}
public void input() {
System.out.println("Nhap ten:");
this.ten = getScanner().nextLine();
System.out.println("Nhap tuoi:");
this.tuoi = getScanner().nextInt();
System.out.println("Nhap dia chi");
this.diachi = getScanner().nextLine();
}
@Override
public String showInfor() {
return String.format("Ten: %s, tuoi:%d, dia chi: %s",this.ten,this.tuoi,this.diachi);
}
}
![Hieu Ngo [community,C2009G]](https://www.gravatar.com/avatar/cee2973101b9cf9580ef561ff3eeecf0.jpg?s=80&d=mm&r=g)
Hieu Ngo
2021-08-31 04:34:31
public interface IInfor {
String showInfor();
}
![Nguyễn Hùng Anh [community,C2009G]](https://www.gravatar.com/avatar/32d1c530d2d2c1f3cd46282949f78ebf.jpg?s=80&d=mm&r=g)
Nguyễn Hùng Anh
2021-08-31 03:41:38
#Car.java
package infor;
import java.util.Scanner;
public class Car extends IInfor{
public String color;
public Car() {
}
public Car(String name, String color) {
super(name);
this.color = color;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
@Override
public String toString() {
return "Car{" +
"color='" + color + '\'' +
", name='" + name + '\'' +
'}';
}
Scanner scanner = new Scanner(System.in);
public void input() {
System.out.println("Enter car's name: ");
name = scanner.next();
System.out.println("Enter car's color: ");
color = scanner.next();
}
@Override
public void showInfor() {
super.showInfor();
System.out.println("color = " + color);
}
}
#IInfor.java
package infor;
public class IInfor {
public String name;
public IInfor() {
}
public IInfor(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public void showInfor() {
System.out.println("name = " + name);
}
}
#People.java
package infor;
import java.util.Scanner;
public class People extends IInfor{
public Integer age;
public String address;
public People() {
}
public People(String name, Integer age, String address) {
super(name);
this.age = age;
this.address = address;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "People{" +
"name='" + name + '\'' +
", age=" + age +
", address='" + address + '\'' +
'}';
}
Scanner scanner = new Scanner(System.in);
public void input() {
System.out.println("Enter person's name: ");
this.name = scanner.next();
System.out.println("Enter person's age: ");
age = scanner.nextInt();
System.out.println("Enter person's address: ");
address = scanner.next();
}
@Override
public void showInfor() {
super.showInfor();
System.out.println("age = " + age + "\naddress = " + address);
}
}
#Main.java
import infor.Car;
import infor.People;
import java.util.ArrayList;
import java.util.Scanner;
public class Main {
public static void main(String [] args) {
// System.out.println("haha");
int c;
ArrayList<People> peoples = new ArrayList<>();
ArrayList<Car> cars = new ArrayList<>();
Scanner scanner = new Scanner(System.in);
System.out.println("Enter number of people: ");
c = scanner.nextInt();
for (int i = 0; i < c; i++) {
People people = new People();
people.input();
peoples.add(people);
}
for (People people: peoples) {
people.showInfor();
}
System.out.println("Enter number of cars: ");
c = scanner.nextInt();
for (int i = 0; i < c; i++) {
Car car = new Car();
car.input();
cars.add(car);
}
for (Car car: cars) {
car.showInfor();
}
}
}
![GokiSoft.com [Teacher]](https://www.gravatar.com/avatar/fc6ba9324e017d540af3613b3a77dd21.jpg?s=80&d=mm&r=g)
GokiSoft.com
2021-07-31 13:03:26
#People.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson01.bt1140;
import java.util.Scanner;
/**
*
* @author Diep.Tran
*/
public class People implements IInfor{
String fullname, address;
int age;
public People() {
}
public People(String fullname, String address, int age) {
this.fullname = fullname;
this.address = address;
this.age = age;
}
public String getFullname() {
return fullname;
}
public void setFullname(String fullname) {
this.fullname = fullname;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public void showInfor() {
System.out.printf("\nTen: %s, tuoi: %d, dia chi: %s\n", fullname, age, address);
}
public void input() {
Scanner scan = new Scanner(System.in);
System.out.println("Nhap ten: ");
fullname = scan.nextLine();
System.out.println("Nhap tuoi: ");
age = Integer.parseInt(scan.nextLine());
System.out.println("Nhap dia chi: ");
address = scan.nextLine();
}
}
#Main.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson01.bt1140;
import java.util.ArrayList;
/**
*
* @author Diep.Tran
*/
public class Main {
public static void main(String[] args) {
People people = new People("TRAN VAN A", "HA NOI", 22);
Car car = new Car("Santafe", "White");
ArrayList<IInfor> list = new ArrayList<>();
list.add(car);
list.add(people);
showAllInfor(list);
}
public static void showAllInfor(ArrayList<IInfor> a) {
a.forEach(infor -> {
infor.showInfor();
});
}
}
#IInfor.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson01.bt1140;
/**
*
* @author Diep.Tran
*/
public interface IInfor {
void showInfor();
}
#Car.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson01.bt1140;
import java.util.Scanner;
/**
*
* @author Diep.Tran
*/
public class Car implements IInfor{
String name, color;
public Car() {
}
public Car(String name, String color) {
this.name = name;
this.color = color;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
@Override
public void showInfor() {
System.out.printf("\nTen: %s, mau: %s\n", name, color);
}
public void input() {
Scanner scan = new Scanner(System.in);
System.out.println("Nhap ten: ");
name = scan.nextLine();
System.out.println("Nhap mau: ");
color = scan.nextLine();
}
}