add more sample about Thread state related code

src/main/java/threaddemo/ThreadStateWithLockSupport.java

@@ -0,0 +1,38 @@
+package threaddemo;
+
+import java.util.concurrent.locks.LockSupport;
+
+public class ThreadStateWithLockSupport {
+
+    public static void main(String[] args) throws InterruptedException {
+        Thread t1 = new Thread(LockSupport::park);
+        t1.start();
+        Thread.sleep(0);
+        System.out.println(STR."1.\{t1.getState()}");
+        LockSupport.unpark(t1);
+        Thread.sleep(0);
+        t1.join();
+        System.out.println(STR."2.\{t1.getState()}");
+
+        Object o = new Object();
+        Thread t2 = new Thread(() -> {
+            synchronized (o) {
+                try {
+                    System.out.println("waiting");
+                    o.wait();
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            }
+        });
+
+        t2.start();
+        Thread.sleep(10);
+        synchronized (o) {
+            System.out.println(STR."t2.1.\{t2.getState()}");
+            o.notify();
+        }
+        Thread.sleep(0);
+        System.out.println(STR."t2.2.\{t2.getState()}");
+    }
+}

src/main/java/threaddemo/ThreadStateWithWait.java

@@ -0,0 +1,43 @@
+package threaddemo;
+
+public class ThreadStateWithWait {
+    public static void main(String[] args) throws InterruptedException {
+        Object object = new Object();
+
+        Thread t1 = new Thread(() -> {
+            synchronized (object) {
+                try {
+                    System.out.println("t1 will wait 100ms");
+                    object.wait(100L);
+                    System.out.println("t1 will wait");
+                    object.wait();
+                    System.out.println("t1 finished");
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            }
+        });
+
+        t1.start();
+        Thread.sleep(90L);
+
+        synchronized (object) {
+            System.out.println(STR."1.t1's state: \{t1.getState()}");
+            object.notify();
+            Thread.sleep(100L);
+            System.out.println(STR."2.t1's state: \{t1.getState()}");
+        }
+
+        Thread.sleep(300L);
+        System.out.println(STR."3.t1's state: \{t1.getState()}");
+
+        Thread.sleep(100L);
+
+        synchronized (object) {
+            object.notify();
+        }
+        System.out.println(STR."4.t1's state: \{t1.getState()}");
+        Thread.sleep(100L);
+        System.out.println(STR."5.t1's state: \{t1.getState()}");
+    }
+}