Update b-3Java多线程.md

Snailclimb · Snailclimb · commit 1e40b7449651 · 2020-05-16T15:37:11.000+08:00
diff --git a/docs/b-3Java多线程.md b/docs/b-3Java多线程.md
@@ -306,7 +306,7 @@ public class Singleton {
     private Singleton() {
     }
 
-    public static Singleton getUniqueInstance() {
+    public synchronized static Singleton getUniqueInstance() {
        //先判断对象是否已经实例过，没有实例化过才进入加锁代码
         if (uniqueInstance == null) {
             //类对象加锁

Original file line number	Diff line number	Diff line change
`@@ -306,7 +306,7 @@ public class Singleton {`
`306`	`306`	`private Singleton() {`
`307`	`307`	`}`
`308`	`308`
`309`		`- public static Singleton getUniqueInstance() {`
	`309`	`+ public synchronized static Singleton getUniqueInstance() {`
`310`	`310`	`//先判断对象是否已经实例过，没有实例化过才进入加锁代码`
`311`	`311`	`if (uniqueInstance == null) {`
`312`	`312`	`//类对象加锁`