blocks|key|1290676|text|你有没有看过这个Java+Tutorial|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1290677|此外，我建议你不要在真正的软件中使用这种东西。使用它是很好的，这样你就知道它是什么了，但是并发到处都有陷阱。如果您正在为其他人构建软件，最好使用更高级别的抽象和同步集合或JMS队列。|1290678|至少我是这么做的。我不是并发专家，所以我尽量避免手动处理线程。|1290679|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/tutorial/essential/concurrency/guardmeth.html^0|8|D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Have you taken a look at this <a href="http://docs.oracle.com/javase/tutorial/essential/concurrency/guardmeth.html" rel="noreferrer">Java Tutorial</a>?

Further, I'd advise you to stay the heck away from playing with this kind of stuff in real software. It's good to play with it so you know what it is, but concurrency has pitfalls all over the place. It's better to use higher level abstractions and synchronized collections or JMS queues if you are building software for other people.

That is at least what I do. I'm not a concurrency expert so I stay away from handling threads by hand wherever possible.

blocks|key|1075758|text|示例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1075759|public+class+myThread+extends+Thread{
+++++@override
+++++public+void+run(){
++++++++while(true){
+++++++++++threadCondWait();//+Circle+waiting...
+++++++++++//bla+bla+bla+bla
++++++++}
+++++}
+++++public+synchronized+void+threadCondWait(){
++++++++while(myCondition){
+++++++++++wait();//Comminucate+with+notify()
++++++++}
+++++}

}
public+class+myAnotherThread+extends+Thread{
+++++@override
+++++public+void+run(){
++++++++//Bla+Bla+bla
++++++++notify();//Trigger+wait()+Next+Step
+++++}

}|code-block|syntax|javascript|1075760|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Example 

<pre><code>public class myThread extends Thread{
 @override
 public void run(){
 while(true){
 threadCondWait();// Circle waiting...
 //bla bla bla bla
 }
 }
 public synchronized void threadCondWait(){
 while(myCondition){
 wait();//Comminucate with notify()
 }
 }

}
public class myAnotherThread extends Thread{
 @override
 public void run(){
 //Bla Bla bla
 notify();//Trigger wait() Next Step
 }

}
</code></pre>

blocks|key|1075829|text|线程处理中的wait()和notifyall()的示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1075830|同步的静态数组列表被用作资源，如果数组列表为空，则调用wait()方法。一旦为数组列表添加了元素，就会调用notify()方法。|1075831|public+class+PrinterResource+extends+Thread{

//resource
public+static+List<String>+arrayList+=+new+ArrayList<String>();

public+void+addElement(String+a){
++++//System.out.println("Add+element+method+"%2Bthis.getName());
++++synchronized+(arrayList)+{
++++++++arrayList.add(a);
++++++++arrayList.notifyAll();
++++}
}

public+void+removeElement(){
++++//System.out.println("Remove+element+method++"%2Bthis.getName());
++++synchronized+(arrayList)+{
++++++++if(arrayList.size()+==+0){
++++++++++++try+{
++++++++++++++++arrayList.wait();
++++++++++++}+catch+(InterruptedException+e)+{
++++++++++++++++//+TODO+Auto-generated+catch+block
++++++++++++++++e.printStackTrace();
++++++++++++}
++++++++}else{
++++++++++++arrayList.remove(0);
++++++++}
++++}
}

public+void+run(){
++++System.out.println("Thread+name+--+"%2Bthis.getName());
++++if(!this.getName().equalsIgnoreCase("p4")){
++++++++this.removeElement();
++++}
++++this.addElement("threads");

}

public+static+void+main(String[]+args)+{
++++PrinterResource+p1+=+new+PrinterResource();
++++p1.setName("p1");
++++p1.start();

++++PrinterResource+p2+=+new+PrinterResource();
++++p2.setName("p2");
++++p2.start();


++++PrinterResource+p3+=+new+PrinterResource();
++++p3.setName("p3");
++++p3.start();


++++PrinterResource+p4+=+new+PrinterResource();
++++p4.setName("p4");
++++p4.start();+++++

++++try{
++++++++p1.join();
++++++++p2.join();
++++++++p3.join();
++++++++p4.join();
++++}catch(InterruptedException+e){
++++++++e.printStackTrace();
++++}
++++System.out.println("Final+size+of+arraylist++"%2BarrayList.size());
+++}
}|code-block|syntax|javascript|1075832|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Example for wait() and notifyall() in Threading.

A synchronized static array list is used as resource and wait() method is called if the array list is empty. notify() method is invoked once a element is added for the array list.

<pre><code>public class PrinterResource extends Thread{

//resource
public static List&lt;String&gt; arrayList = new ArrayList&lt;String&gt;();

public void addElement(String a){
 //System.out.println("Add element method "+this.getName());
 synchronized (arrayList) {
 arrayList.add(a);
 arrayList.notifyAll();
 }
}

public void removeElement(){
 //System.out.println("Remove element method "+this.getName());
 synchronized (arrayList) {
 if(arrayList.size() == 0){
 try {
 arrayList.wait();
 } catch (InterruptedException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }else{
 arrayList.remove(0);
 }
 }
}

public void run(){
 System.out.println("Thread name -- "+this.getName());
 if(!this.getName().equalsIgnoreCase("p4")){
 this.removeElement();
 }
 this.addElement("threads");

}

public static void main(String[] args) {
 PrinterResource p1 = new PrinterResource();
 p1.setName("p1");
 p1.start();

 PrinterResource p2 = new PrinterResource();
 p2.setName("p2");
 p2.start();


 PrinterResource p3 = new PrinterResource();
 p3.setName("p3");
 p3.start();


 PrinterResource p4 = new PrinterResource();
 p4.setName("p4");
 p4.start(); 

 try{
 p1.join();
 p2.join();
 p3.join();
 p4.join();
 }catch(InterruptedException e){
 e.printStackTrace();
 }
 System.out.println("Final size of arraylist "+arrayList.size());
 }
}
</code></pre>

Can I get a complete simple scenario i.e. tutorial that suggest how this should be used, specifically with a Queue?

A simple scenario using wait() and notify() in java

我可以得到一个完整的简单场景，即教程，建议如何使用它，特别是与队列一起使用吗？

问在java中使用wait()和notify()的简单场景
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在java中使用wait()和notify()的简单场景EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在java中使用wait()和notify()的简单场景
EN