lifecycle of thread

rahulXbarnwal · rahulXbarnwal · commit 15c0a661278d · 2026-01-19T22:47:43.000+05:30
diff --git a/src/multithreading/MyThread.java b/src/multithreading/MyThread.java
@@ -0,0 +1,28 @@
+package multithreading;
+
+public class MyThread extends Thread{
+    @Override
+    public void run() {
+        System.out.println("RUNNING");
+        try {
+            Thread.sleep(2000);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void main(String[] args) throws InterruptedException {
+        MyThread t1 = new MyThread();
+        System.out.println(t1.getState()); // NEW
+        t1.start();
+        System.out.println(t1.getState()); // RUNNABLE
+//        System.out.println(Thread.currentThread().getState()); // RUNNABLE
+
+        Thread.sleep(100);
+        System.out.println(t1.getState()); // TIMED_WAITING
+
+        // caller method (main) will wait for t1 to get finished
+        t1.join();
+        System.out.println(t1.getState()); // TERMINATED
+    }
+}
diff --git a/src/multithreading/ThreadLifeCycle.java b/src/multithreading/ThreadLifeCycle.java
@@ -0,0 +1,21 @@
+package multithreading;
+
+/*
+The lifecycle of a thread in Java consists of several state, which a thread can move through during its execution
+
+- New:              Created but not started
+- Runnable:         After the start method is called, the thread becomes runnable.
+                    It's ready to run & is waiting for CPU time.
+- Running:          When it's executing.
+- Blocked/Waiting:  When it's waiting for a resource or for another thread to perform an action.
+- Terminated:       When it has finished executing.
+ */
+
+public class ThreadLifeCycle {
+    public static void main(String[] args) {
+
+        World t1 = new World(); // NEW
+        t1.start(); // RUNNABLE
+        System.out.println();
+    }
+}
