└── Drill05.java


/Drill05.java:
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 1 | import java.util.List;
 2 | 
 3 | public class Drill05 {
 4 | 	
 5 | 	// Given a list of lists of Shapes organized in a grid, 
 6 | 	// return the shape in the given row and column.
 7 |     public static Shape getShapeFromGrid(List<List<Shape>> grid, int row,
 8 |             int col) {
 9 |         return grid.get(row).get(col);
10 |     }
11 | 
12 |     // Return true if the shape in the given location is a Triangle 
13 |     // and false otherwise.
14 |     public static boolean isTriangle(List<List<Shape>> grid, int row, int col) {
15 |     	if (grid.get(row).get(col) instanceof Triangle) {
16 |     		return true;
17 |     	}
18 |         return false;
19 |     }
20 |     
21 |     // Return true if the shape in the given location is a Square 
22 |     // and false otherwise.
23 |     public static boolean isSquare(List<List<Shape>> grid, int row, int col) {
24 |     	if (grid.get(row).get(col) instanceof Square) {
25 |     		return true;
26 |     	}
27 |         return false;
28 |     }
29 | 
30 |     // Concatenate all of the Strings in the grid by going row by row. 
31 |     // If a row or row and column location is null, then just concatenate 
32 |     // in an empty string.
33 |     public static String byRow(List<List<String>> grid) {
34 |     	String result = "";
35 |     	for (int i = 0; i < grid.size(); i++) {
36 |     		if (grid.get(i) == null)
37 |     			continue;
38 |     		for (int j = 0; j < grid.get(i).size(); j++) {
39 |     			if (grid.get(i).get(j) == null) {
40 |     				result += "";
41 |     			}
42 |     			else {
43 |     				result += grid.get(i).get(j);
44 |     			}
45 |     		}
46 |     	}
47 |         return result;
48 |     }
49 |     
50 |     // Set the given row and column in the given screen to the given character.
51 |     public static void setArrayElem(char[][] screen, int row, int col, char c) {
52 |     	screen[row][col] = c;
53 |     }
54 | 
55 | }
56 | 


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