added thread pointcut examples

src/aspects/ThreadAspect.aj

+package aspects;
+
+public aspect ThreadAspect {
+
+	before() : execution(* java.lang.Thread.start(..)) {
+		System.out.println(thisJoinPointStaticPart);
+	}
+
+	before() : call(* java.lang.Thread.start(..)) {
+		System.out.println(thisJoinPointStaticPart);
+	}
+
+	before() : call(* java.lang.Thread.run(..)) {
+		System.out.println(thisJoinPointStaticPart);
+	}
+
+	before() : execution(java.lang.Thread.new(..)) {
+		System.out.println(thisJoinPointStaticPart);
+	}
+
+	before() : call(java.lang.Thread.new(..)) {
+		System.out.println(thisJoinPointStaticPart);
+	}
+}

src/examples/ThreadOperationsExample.java

+package examples;
+
+public class ThreadOperationsExample {
+
+	public static void main(String[] args) throws InterruptedException {
+		Thread thread = createThread();
+		thread.start();
+		
+		thread.join();
+	}
+
+	private static Thread createThread() {
+		return new Thread();
+	}
+
+}