互斥问题请指教（源代码如下：）

2005-04-01 08:01:50 132 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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Android权限篇 ContextCompat.checkSelfPermission() 方法【确定您的应用是否已被授予权限】一、Android上声明和请求运行时权限的工作流程在应用程序的manifest文件中声明该权限将你的应用UX设计成不言自明的等待用户请求一个特定的操作许可已经授予你的应用程序（1）Yes ：访问受权限保护的信息（2）No ：显示原理给用户吗 No：显示原理给用户吗 Yes : 向用户解释为什么你的应用需要这个权限 – > 请求允许显示系统对话框 No : 请求允许显示系统对话框是否授予您的应用程序权限? Yes : 访问受权限保护的信息 No : 优雅降级你的应用程阅读详情

//我的问题是为什么缓冲区满了后生产者会继续执行push(）操作
package stone.pandc;
public class PandC{
public static void main(String arg[]){
BufStack buffer = new BufStack();
Runnable source = new Producer(buffer);
Runnable destination = new Consumer(buffer);
Thread p1 = new Thread(source);
// Thread p2 = new Thread(source);
Thread c1 = new Thread(destination);
// Thread c2 = new Thread(destination);
p1.start();
// p2.start();
c1.start();
// c2.start();
}
}
// the buffer
class BufStack {
private int index = 0;
private char buffer[] = new char[6];
private int pCounter = 1;
private int cCounter = 1;
//
public synchronized void push(char c){
while(index == buffer.length){
try{
System.out.println("the buffer is full ! waiting for the consumer !"+(pCounter++));
this.wait();
}
catch(InterruptedException e){ }
}
this.notify();
buffer[index] = c;
index++;
//System.out.println("thread "+"produced: "+c+" ");
}
//
public synchronized char pop( ){
while(index == 0){
try{
System.out.println("the buffer is empty ! waiting for the producer !"+(cCounter++));
this.wait();
}
catch(InterruptedException e){ }
}
this.notify();
index--;
return buffer[index];
}

}
// the producer thread
class Producer implements Runnable{
BufStack mybuf;

public Producer(BufStack pbuf){
mybuf = pbuf;
}

public void run( ){
char c;
for(int i = 0;i < 20;i ++){
c=(char)(Math.random()*26+ 'A');
mybuf.push(c);
System.out.println("thread "+"produced: "+c+" "+i);
try{
Thread.sleep((int)(Math.random( )*1000));
}
catch (InterruptedException e){ }
}
}

}
//the consumer thread
class Consumer implements Runnable{
BufStack mybuf;

public Consumer(BufStack pbuf){
mybuf = pbuf;
}

public void run( ){
char c;
for(int i = 0;i < 20;i ++){
c = mybuf.pop();
System.out.println("Consumed: "+c);
try{
Thread.sleep((int)(Math.random( )*1500));
}
catch (InterruptedException e){ }
}
}

}

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