23,407
社区成员
发帖
与我相关
我的任务
分享**散分**
当然要回答我的问题哦：
有一个名为obj的Object被A、B访问（同步）
class A {
new Thread(new B()).start(); //①
//wait here
...
}
class B implements Runnable{
...
}
①处，当A所在的线程处于wait()状态时，B也同时处于wait()状态（待定，我在测试时运行到一段就不走了）。是不是因为A是B的父线程(我觉得没道理)，用什么方法可以解决？
已经排除死锁的可能。
有一个名为obj的Object被A、B访问（同步）
class A {
new Thread(new B()).start(); //①
//wait here
...
}
class B implements Runnable{
...
}
①处，当A所在的线程处于wait()状态时，B也同时处于wait()状态（待定，我在测试时运行到一段就不走了）。是不是因为A是B的父线程(我觉得没道理)，用什么方法可以解决？
已经排除死锁的可能。
...全文
请发表友善的回复…
发表回复
funpig 2003-02-26
- 打赏
- 举报
up
nocturnetian 2003-02-25
- 打赏
- 举报
接
orange2002 2003-02-25
- 打赏
- 举报
up
redkey 2003-02-25
- 打赏
- 举报
接分了
E17 2003-02-25
- 打赏
- 举报
up
marf_cn 2003-02-25
- 打赏
- 举报
up
willingsilly 2003-02-25
- 打赏
- 举报
public class A {
private OO obj=new OO();
public void test(){
new Thread(new B(obj)).start();
System.out.println("getChar="+obj.getChar());
}
public static void main(String[] args) {
A a=new A();
a.test();
}
}
class OO{
private char c=' ';
public synchronized char getChar(){
try {
System.out.println("wait for char...");
wait();
System.out.println("wake up");
}
catch (InterruptedException ex) {
ex.printStackTrace();
}
return c;
}
public synchronized void setChar(char aC){
c=aC;
System.out.println("notifying...");
notify();
System.out.println("notified");
}
}
class B implements Runnable{
OO obj=null;
public B(OO obj){
this.obj=obj;
}
public void run(){
System.out.println("set Char");
obj.setChar('a');
}
}
以上是简化了的代码，输出结果为：
wait for char...
set Char
notifying...
notified
wake up
getChar=a
是正确的，为什么实际中就有问题呢？哎，测ing...
谢谢大家，回头结分。
private OO obj=new OO();
public void test(){
new Thread(new B(obj)).start();
System.out.println("getChar="+obj.getChar());
}
public static void main(String[] args) {
A a=new A();
a.test();
}
}
class OO{
private char c=' ';
public synchronized char getChar(){
try {
System.out.println("wait for char...");
wait();
System.out.println("wake up");
}
catch (InterruptedException ex) {
ex.printStackTrace();
}
return c;
}
public synchronized void setChar(char aC){
c=aC;
System.out.println("notifying...");
notify();
System.out.println("notified");
}
}
class B implements Runnable{
OO obj=null;
public B(OO obj){
this.obj=obj;
}
public void run(){
System.out.println("set Char");
obj.setChar('a');
}
}
以上是简化了的代码，输出结果为：
wait for char...
set Char
notifying...
notified
wake up
getChar=a
是正确的，为什么实际中就有问题呢？哎，测ing...
谢谢大家，回头结分。
cyicecream 2003-02-25
- 打赏
- 举报
给分给分
lotofu 2003-02-25
- 打赏
- 举报
同步锁何时解除，条件是否有误？
colors 2003-02-25
- 打赏
- 举报
upupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupupupupupupupuppupup
gks_cn 2003-02-25
- 打赏
- 举报
up
willingsilly 2003-02-25
- 打赏
- 举报
liujuntao(为忘记你而天涯海角流浪)，你睡着了？
这个问题解决不了，我也要wait了，各位好汉帮帮我触摸画册吧。
up有分！
这个问题解决不了，我也要wait了，各位好汉帮帮我触摸画册吧。
up有分！
lkenshin 2003-02-25
- 打赏
- 举报
up应该也有分吧
willingsilly 2003-02-25
- 打赏
- 举报
我想如果加一个类C , 让A、B“平等”就可能能解决，但是原来的代码改起来麻烦。
是不是因为B在A中创建，A 等待时 B也等待?
是不是因为B在A中创建，A 等待时 B也等待?
willingsilly 2003-02-25
- 打赏
- 举报
bluemeteor(挂月||╭∩╮(︶︿︶)╭∩╮) ，
A wait了B当然也wait 了?为什么？
有什么办法避免呢？
A wait了B当然也wait 了?为什么？
有什么办法避免呢？
willingsilly 2003-02-25
- 打赏
- 举报
没有，
B调用obj的方法1，方法1里只有调用了notify
B调用obj的方法1，方法1里只有调用了notify
kofwr 2003-02-25
- 打赏
- 举报
接分...
liujuntao 2003-02-25
- 打赏
- 举报
同时等待，我去唤醒吧，：）
bluemeteor 2003-02-25
- 打赏
- 举报
A wait了B当然也wait 了
没有别的event负责start A么？
没有别的event负责start A么？
zhlx1977 2003-02-25
- 打赏
- 举报
B
加载更多回复（3）
