Question

Java题目，高手麻烦帮忙做一下！

11、按以下要求编写程序
(1) 编写Computer接口，接口中声明poweron() 方法
(2) 定义PC类和Laptop类实现Computer接口
(3) 编写PC类和Laptop类的测试程序，并调用其中的poweron()方法

Answer 1

public interface Computer {
public void poweron();
}
class PC implements Computer{
public void poweron() {
System.out.println("PC实现Computer接口");
}

}
class Laptop implements Computer{
public void poweron() {
stem.out.println("Laptop实现Computer接口");
}

}

public class Test {
public static void main(String[] args) {
Computer pc=new PC();
Computer laptop=new Laptop();
pc.poweron();
laptop.poweron();
}
}

Answer 2

public interface Computer{ void poweron();}

public class Pc implements Computer{
public void poweron(){
Sysout.out.print("Pc")

}

}
public class Laptop implements Computer{
public void poweron(){
Sysout.out.print("Laptop ")

}

}

public class Test {
public static void main(String[] args){
new Pc().poweron();

new Laptop ().poweron();
}

}

Answer 3

interface Computer{
void poweron()

}

class PC implements Computer{
public void poweron(){
System.out.println('pc');

}

}

class Laptop implements Computer{
public void poweron(){
System.out.println('laptop');

}

}

public class Test{
public staticvoid main(String[] args){
Computer pc = new PC();
pc.poweron();

Computer laptop= new Laptop ();
laptop.poweron();
}

}

Answer 4

public interface Computer{
public void poweron() ;
}

public class PC extends Computer{
public void poweron() {
System.out.println("PC");
}
}

public class Laptop extends Computer{
public void poweron() {
System.out.println("Laptop");
}
}

public class Test{
public static void main(String[] args) {
PC pc = new PC();
pc.poweron();

Laptop laptop = new PC();
laptop.poweron();
}
}