added template method sample

template-method/src/main/java/com/iluwatar/App.java

@@ -0,0 +1,12 @@
+package com.iluwatar;
+
+public class App 
+{
+    public static void main( String[] args )
+    {
+    	HalflingThief thief = new HalflingThief(new HitAndRunMethod());
+    	thief.steal();
+    	thief.changeMethod(new SubtleMethod());
+    	thief.steal();
+    }
+}

template-method/src/main/java/com/iluwatar/HalflingThief.java

@@ -0,0 +1,18 @@
+package com.iluwatar;
+
+public class HalflingThief {
+
+	private StealingMethod method;
+
+	public HalflingThief(StealingMethod method) {
+		this.method = method;
+	}
+	
+	public void steal() {
+		method.steal();
+	}
+	
+	public void changeMethod(StealingMethod method) {
+		this.method = method;
+	}
+}

template-method/src/main/java/com/iluwatar/HitAndRunMethod.java

@@ -0,0 +1,20 @@
+package com.iluwatar;
+
+public class HitAndRunMethod extends StealingMethod {
+
+	@Override
+	protected String pickTarget() {
+		return "old goblin woman";
+	}
+
+	@Override
+	protected void confuseTarget(String target) {
+		System.out.println("Approach the " + target + " from behind.");
+	}
+
+	@Override
+	protected void stealTheItem(String target) {
+		System.out.println("Grab the handbag and run away fast!");
+	}
+
+}

template-method/src/main/java/com/iluwatar/StealingMethod.java

@@ -0,0 +1,17 @@
+package com.iluwatar;
+
+public abstract class StealingMethod {
+
+	protected abstract String pickTarget();
+	
+	protected abstract void confuseTarget(String target);
+	
+	protected abstract void stealTheItem(String target);
+
+	public void steal() {
+		String target = pickTarget();
+		System.out.println("The target has been chosen as " + target + ".");
+		confuseTarget(target);
+		stealTheItem(target);
+	}
+}

template-method/src/main/java/com/iluwatar/SubtleMethod.java

@@ -0,0 +1,20 @@
+package com.iluwatar;
+
+public class SubtleMethod extends StealingMethod {
+
+	@Override
+	protected String pickTarget() {
+		return "shop keeper";
+	}
+
+	@Override
+	protected void confuseTarget(String target) {
+		System.out.println("Approach the " + target + " with tears running and hug him!");
+	}
+
+	@Override
+	protected void stealTheItem(String target) {
+		System.out.println("While in close contact grab the " + target + "'s wallet.");
+	}
+
+}