Prototype Design Pattern

slgobinath · slgobinath · commit 782a1b375eb7 · 2015-11-19T22:25:52.000+05:30
diff --git a/designpatterns/prototype/Board.java b/designpatterns/prototype/Board.java
@@ -0,0 +1,40 @@
+public class Board implements Cloneable {
+	public static final int NO_OF_ROWS = 8;
+	public static final int NO_OF_COLUMNS = 8;
+
+	private final Cell[][] board;
+
+	public Board() {
+		this.board = new Cell[NO_OF_ROWS][NO_OF_COLUMNS];
+
+		for (int row = NO_OF_ROWS - 1; row >= 0; row--) {
+			for (int col = NO_OF_COLUMNS - 1; col >= 0; col--) {
+				if ((row + col) % 2 == 0) {
+					board[row][col] = new Cell("WHITE");
+				} else {
+					board[row][col] = new Cell("BLACK");
+				}
+			}
+		}
+	}
+
+	public void print() {
+		for (int row = 0; row < NO_OF_ROWS; row++) {
+			for (int col = 0; col < NO_OF_COLUMNS; col++) {
+				System.out.print(board[row][col] + " ");
+			}
+			System.out.println();
+		}
+	}
+
+	@Override
+	public Object clone() {
+		Object obj = null;
+		try {
+			obj = super.clone();
+		} catch (CloneNotSupportedException e) {
+			e.printStackTrace();
+		}
+		return obj;
+	}
+}
diff --git a/designpatterns/prototype/Cell.java b/designpatterns/prototype/Cell.java
@@ -0,0 +1,33 @@
+public class Cell implements Cloneable {
+	private String color;
+
+	public Cell(String color) {
+		this.color = color;
+
+		// Make it time consuming task.
+		try {
+			Thread.sleep(100);
+		} catch (InterruptedException e) {
+		}
+	}
+
+	public String getColor() {
+		return color;
+	}
+
+	@Override
+	public String toString() {
+		return color.substring(0, 1);
+	}
+
+	@Override
+	public Object clone() {
+		Object obj = null;
+		try {
+			obj = super.clone();
+		} catch (CloneNotSupportedException e) {
+			e.printStackTrace();
+		}
+		return obj;
+	}
+}
diff --git a/designpatterns/prototype/Main.java b/designpatterns/prototype/Main.java
@@ -0,0 +1,33 @@
+
+public class Main {
+
+	public static void main(String[] args) {
+		// Get the start time
+		long startTime = System.currentTimeMillis();
+
+		Board chessBoard = new Board();
+
+		// Get the end time
+		long endTime = System.currentTimeMillis();
+
+		System.out.println("Time taken to create a board: " + (endTime - startTime) + " millis");
+
+		// Print the board
+		chessBoard.print();
+
+		System.out.println();
+
+		// Get the start time
+		startTime = System.currentTimeMillis();
+
+		Board checkersBoard = (Board) chessBoard.clone();
+
+		// Get the end time
+		endTime = System.currentTimeMillis();
+
+		System.out.println("Time taken to clone a board: " + (endTime - startTime) + " millis");
+
+		checkersBoard.print();
+	}
+
+}
