Disclaimer: This article is a blogger original article, shall not be reproduced without the bloggers allowed. https://blog.csdn.net/houjunkang363/article/details/90632625
1. Identify the following compilation error codes, and why
//哺乳动物
public class Mammals{
}
//鸟类
public class Birds{
}
//蝙蝠
public class Bat extends Mammals,Birds{
}2. Say the output of the following code, and explain why
public class Sub extends Base{
String color;
public Sub(double size,String name,String color){
super(size,name);
this.color=color;
}
public static void main(String[] args){
Sub s=new Sub(5.6,"测试对象","红色");
System.out.println(s.size+"--"+s.name+"--"+s.color);
}
}
class Base{
double size;
String name;
public Base(double size,String name){
this.size=size;
this.name=name;
}
}3. say the output of the following code, and explain why
//鸵鸟
public class Ostrich extends Bird{
public void fly(){
System.out.println("我只能在地上奔跑...");
}
public static void main(String[] args){
Ostrich os=new Ostrich();
os.fly();
}
}
class Bird{
public void fly(){
System.out.println("我在天空里自由自在的飞翔...");
}
}4. say the output of the following code, and explain why
public class SlowPoint extends Point{
public void move(int dx,int dy){
System.out.println("SlowPoint move parameter");
move();
}
public static void main(String[] args){
SlowPoint sp=new SlowPoint();
sp.move(10,20);
}
}
class Point{
public void move(int dx,int dy){
System.out.println("Point move parameter");
}
public void move(){
System.out.println("Point move");
}
}5. Complete TetrominoGame
In class base case "Java method Rewrite Rules" on the realization of the whereabouts of the console version of the T-box, left and right, console input results are as follows:
---------打印T型---------
i am a T
(0,4),(0,5),(0,6),(1,5)
- - - - * * * - - -
- - - - - * - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
1——下落，2——向左，3——向右，0——退出
1
- - - - - - - - - -
- - - - * * * - - -
- - - - - * - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
1——下落，2——向左，3——向右，0——退出
2
- - - - - - - - - -
- - - * * * - - - -
- - - - * - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
1——下落，2——向左，3——向右，0——退出
3
- - - - - - - - - -
- - - - * * * - - -
- - - - - * - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
1——下落，2——向左，3——向右，0——退出
0When the user selects one, represents the drop function is selected; when the user selects 2, moved to the left indicating the selection function; 3 is selected when the user indicates that the user selected the function moves to the right; 0 indicates when the user selects the user selects Quit Features.
Scan code concern me:
