From 453c52987ec942382692b32ee256ec9e24dee4a6 Mon Sep 17 00:00:00 2001
From: ehlxr <ehlxr.me@gmail.com>
Date: Sat, 13 Feb 2021 18:03:11 +0800
Subject: [PATCH] Optimized code

---
 .../java/io/github/ehlxr/extension/SPI.java   |  2 --
 .../java/io/github/ehlxr/thread/Main.java     | 34 ++++++++++++-------
 2 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/src/main/java/io/github/ehlxr/extension/SPI.java b/src/main/java/io/github/ehlxr/extension/SPI.java
index 69fdfb5..e88ece2 100644
--- a/src/main/java/io/github/ehlxr/extension/SPI.java
+++ b/src/main/java/io/github/ehlxr/extension/SPI.java
@@ -24,8 +24,6 @@
 
 package io.github.ehlxr.extension;
 
-import io.github.ehlxr.did.extension.ExtensionLoader;
-
 import java.lang.annotation.*;
 
 /**
diff --git a/src/main/java/io/github/ehlxr/thread/Main.java b/src/main/java/io/github/ehlxr/thread/Main.java
index 961749b..b282096 100644
--- a/src/main/java/io/github/ehlxr/thread/Main.java
+++ b/src/main/java/io/github/ehlxr/thread/Main.java
@@ -31,27 +31,37 @@ package io.github.ehlxr.thread;
 public class Main {
     private static volatile boolean flag = false;
 
+    /**
+     * 1、子线程阻塞主线程将会结束
+     * 2、JVM 会等待待所有子线程结束
+     * <p>
+     * When a Java Virtual Machine starts up, there is usually a single
+     * non-daemon thread (which typically calls the method named main of some
+     * designated class). The Java Virtual Machine continues to execute
+     * threads until either of the following occurs:
+     * <p>
+     * The exit method of class Runtime has been called and the security manager has permitted the exit operation to take place.
+     * All threads that are not daemon threads have died, either by returning from the call to the run method or by throwing an exception
+     * that propagates beyond the run method.
+     */
+    @SuppressWarnings("AlibabaAvoidManuallyCreateThread")
     public static void main(String[] args) throws InterruptedException {
         new Thread(() -> {
             System.out.println("wating data...." + Thread.currentThread().getName());
-            try {
-                Thread.sleep(2000);
-            } catch (InterruptedException e) {
-                e.printStackTrace();
+            while (!flag) {
             }
 
-
             System.out.println("complete!" + Thread.currentThread().getName());
 
         }).start();
 
-        // Thread.sleep(2000);
+        Thread.sleep(2000);
 
-        // new Thread(() -> {
-        //     System.out.println("prepare data..." + Thread.currentThread().getName());
-        //     flag = true;
-        //
-        //     System.out.println("prepare data end..." + Thread.currentThread().getName());
-        // }).start();
+        new Thread(() -> {
+            System.out.println("prepare data..." + Thread.currentThread().getName());
+            flag = true;
+
+            System.out.println("prepare data end..." + Thread.currentThread().getName());
+        }).start();
     }
 }