docs: update thread pool

thread-pool/src/main/java/com/iluwatar/threadpool/Task.java

@@ -25,6 +25,7 @@
 package com.iluwatar.threadpool;
 
 import java.util.concurrent.atomic.AtomicInteger;
+import lombok.Getter;
 
 /**
  * Abstract base class for tasks.
@@ -33,7 +34,9 @@ public abstract class Task {
 
   private static final AtomicInteger ID_GENERATOR = new AtomicInteger();
 
+  @Getter
   private final int id;
+  @Getter
   private final int timeMs;
 
   public Task(final int timeMs) {
@@ -41,14 +44,6 @@ public abstract class Task {
     this.timeMs = timeMs;
   }
 
-  public int getId() {
-    return id;
-  }
-
-  public int getTimeMs() {
-    return timeMs;
-  }
-
   @Override
   public String toString() {
     return String.format("id=%d timeMs=%d", id, timeMs);

thread-pool/src/main/java/com/iluwatar/threadpool/Worker.java

@@ -45,7 +45,7 @@ public class Worker implements Runnable {
     try {
       Thread.sleep(task.getTimeMs());
     } catch (InterruptedException e) {
-      e.printStackTrace();
+      LOGGER.error("Error occurred: ", e);
     }
   }
 }