From ef4ee45a18de65b0c81bbe8da16c0b063b2201a5 Mon Sep 17 00:00:00 2001
From: Ahmed Tawila <atawila@yahoo.com>
Date: Thu, 26 Oct 2017 11:48:45 +0200
Subject: [PATCH] BAEL-1263 Daemon Threads in Java

---
 .../baeldung/concurrent/daemon/NewThread.java |  9 +++++
 .../concurrent/daemon/DaemonThreadTest.java   | 33 +++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 core-java-concurrency/src/main/java/com/baeldung/concurrent/daemon/NewThread.java
 create mode 100644 core-java-concurrency/src/test/java/com/baeldung/concurrent/daemon/DaemonThreadTest.java

diff --git a/core-java-concurrency/src/main/java/com/baeldung/concurrent/daemon/NewThread.java b/core-java-concurrency/src/main/java/com/baeldung/concurrent/daemon/NewThread.java
new file mode 100644
index 0000000000..a9433a8333
--- /dev/null
+++ b/core-java-concurrency/src/main/java/com/baeldung/concurrent/daemon/NewThread.java
@@ -0,0 +1,9 @@
+package com.baeldung.concurrent.daemon;
+
+public class NewThread extends Thread {
+
+    public void run() {
+        for (int i = 0; i < 10; i++)
+            System.out.println("New Thread is running...");
+    }
+}
diff --git a/core-java-concurrency/src/test/java/com/baeldung/concurrent/daemon/DaemonThreadTest.java b/core-java-concurrency/src/test/java/com/baeldung/concurrent/daemon/DaemonThreadTest.java
new file mode 100644
index 0000000000..96f79cd0dd
--- /dev/null
+++ b/core-java-concurrency/src/test/java/com/baeldung/concurrent/daemon/DaemonThreadTest.java
@@ -0,0 +1,33 @@
+package com.baeldung.concurrent.daemon;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class DaemonThreadTest {
+
+    @Test
+    public void whenCallIsDaemon_thenCorrect() {
+        NewThread daemonThread = new NewThread();
+        NewThread userThread = new NewThread();
+        daemonThread.setDaemon(true);
+        daemonThread.start();
+        userThread.start();
+
+        assertTrue(daemonThread.isDaemon());
+        assertFalse(userThread.isDaemon());
+    }
+
+    @Test(expected = IllegalThreadStateException.class)
+    public void givenUserThread_whenSetDaemonWhileRunning_thenIllegalThreadStateException() {
+        NewThread daemonThread = new NewThread();
+        daemonThread.start();
+        daemonThread.setDaemon(true);
+    }
+
+    @Test
+    public void givenUserThread_whenStartThread_thenFalse() {
+        NewThread daemonThread = new NewThread();
+    }
+}