java

图形试验，主要向上造型
 1 package com.example;
 2 
 3 /**
 4  * Created by Administrator on 17-5-23.
 5  */
 6 
 7 public class TetrominoTest {
 8     public void main(String[] args){
 9         Tetromino tt = new T(2,6);
10         printTetromino(tt);
11     }
12 
13     void printTetromino(Tetromino t){
14        Cell[] cells = t.cells;
15     }
16 }
17 
18 class Cell{
19     Cell(int row,int col){
20     }
21 }
22 
23 class Tetromino{
24     Cell[] cells;
25     Tetromino(){
26         this.cells = new Cell[4];
27     }
28 }
29 
30 class T extends Tetromino{
31     T(int row,int col){
32         super();
33         cells[0] = new Cell(row,col);
34         cells[1] = new Cell(row,col+1);
35         cells[2] = new Cell(row,col+2);
36         cells[3] = new Cell(row+1,col+1);
37 
38     }
39 }