PatternStrategy: Initial commit

System Development/PatternStrategy/src/DoAdd.java

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+public class DoAdd implements Strategy{
+   @Override
+   public int doOperation(int num1, int num2) {
+      return num1 + num2;
+   }
+}

System Development/PatternStrategy/src/DoMultiply.java

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+public class DoMultiply implements Strategy{
+   @Override
+   public int doOperation(int num1, int num2) {
+      return num1 * num2;
+   }
+}

System Development/PatternStrategy/src/DoSubtract.java

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+public class DoSubtract implements Strategy{
+   @Override
+   public int doOperation(int num1, int num2) {
+      return num1 - num2;
+   }
+}

System Development/PatternStrategy/src/PatternStrategy.java

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+
+public class PatternStrategy {
+	   public static void main(String[] args) {
+		      SelectToDo toDo1 = new SelectToDo(new DoAdd());		
+		      System.out.println("3 + 2 = " + toDo1.executeStrategy(3, 2));
+
+		      SelectToDo toDo2 = new SelectToDo(new DoSubtract());		
+		      System.out.println("3 - 2 = " + toDo2.executeStrategy(3, 2));
+
+		      SelectToDo toDo3 = new SelectToDo(new DoMultiply());		
+		      System.out.println("3 * 2 = " + toDo3.executeStrategy(3, 2));
+		   }
+}

System Development/PatternStrategy/src/SelectToDo.java

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+
+public class SelectToDo {
+	   private Strategy strategy;
+
+	   public SelectToDo(Strategy strategy){
+	      this.strategy = strategy;
+	   }
+
+	   public int executeStrategy(int num1, int num2){
+	      return strategy.doOperation(num1, num2);
+	   }
+}

System Development/PatternStrategy/src/Strategy.java

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+
+public interface Strategy {
+	public int doOperation(int num1, int num2);
+}