1 package oo.day04;
2 //格子类
3 public class Cell {
4
5 int row; //行号
6 int col; //列号
7
8 Cell(int row,int col){
9 this.row = row;
10 this.col = col;
11 }
12 Cell(int n){
13 this(n,n);
14 }
15 Cell(){
16 this(0,0);
17 }
18
19 void drop(){ //下落1格
20 row++;
21 }
22 void moveLeft(int n){ //左移n格
23 col-=n;
24 }
25 String getCellInfo(){ //获取格子行号和列号
26 return row+","+col;
27 }
28
29 void drop(int n){ //下落n格
30 row+=n;
31 }
32 void moveLeft(){
33 col--;
34 }
35
36 }
1 package oo.day04;
2 //J型----子类
3 public class J extends Tetromino {
4 J(){
5 this(0,0);
6 }
7 J(int row,int col){
8 cells[0] = new Cell(row,col);
9 cells[1] = new Cell(row,col+1);
10 cells[2] = new Cell(row,col+2);
11 cells[3] = new Cell(row+1,col+2);
12 }
13
14 void print(){ //重写
15 System.out.println("I am a J");
16 super.print();
17 }
18 }
1 package oo.day04;
2 //T型----子类
3 public class T extends Tetromino {
4 T(){
5 this(0,0);
6 }
7 T(int row,int col){
8 super(); //默认的，调用父类的构造方法
9 this.cells[0] = new Cell(row,col);
10 this.cells[1] = new Cell(row,col+1);
11 this.cells[2] = new Cell(row,col+2);
12 this.cells[3] = new Cell(row+1,col+1);
13 }
14
15 void print(){ //重写
16 System.out.println("I am a T");
17 super.print(); //调用父类的print方法
18 }
19 }
1 package oo.day04;
2 //四格拼板----父类
3 public class Tetromino {
4 Cell[] cells; //格子数组
5 Tetromino(){
6 cells = new Cell[4];
7 }
8
9 void drop(){ //下落
10 for(int i=0;i<cells.length;i++){
11 cells[i].row++;
12 }
13 }
14 void moveLeft(){ //左移
15 for(int i=0;i<cells.length;i++){
16 cells[i].col--;
17 }
18 }
19 void moveRight(){ //右移
20 for(int i=0;i<cells.length;i++){
21 cells[i].col++;
22 }
23 }
24 void print(){ //输出格子坐标
25 for(int i=0;i<cells.length;i++){
26 String str = cells[i].getCellInfo();
27 System.out.println(str);
28 }
29 }
30 }
1 package oo.day04;
2 //T类、J类测试类
3 public class TJTest {
4 public static void main(String[] args) {
5 /*
6 Tetromino o1 = new T(2,5); //向上造型
7 printCell(o1); //先造型，再传值
8
9 J o2 = new J(2,5);
10 printCell(o2); //传值的同时造型
11 */
12
13 T t = new T(2,5);
14 t.print();
15
16 J j = new J(3,4);
17 j.print();
18
19 }
20
21 //打墙+打T型
22 public static void printCell(Tetromino tt){
23 for(int i=0;i<20;i++){
24 for(int j=0;j<10;j++){
25
26 boolean flag = true; //1.假设打-
27 for(int k=0;k<tt.cells.length;k++){
28 if(tt.cells[k].row==i && tt.cells[k].col==j){
29 flag = false; //2.打*
30 break;
31 }
32 }
33 if(flag){ //3.判断
34 System.out.print("- ");
35 }else{
36 System.out.print("* ");
37 }
38
39 }
40 System.out.println();
41 }
42 }
43
44 }
