java中的线程数组
本文关键字:数组 线程 java | 更新日期: 2023-09-27 18:00:23
我需要知道java中的线程数组
Thread[] TCreate = new Thread[iThreadSize];
for (int i = 0; i < TCreate.Length; i++)
{
TCreate[i] = new Thread(delegate()
{
lst.Add(this.getResult(url));
});
TCreate[i].Name = "URL"+i;
TCreate[i].Start();
}
for(int j=0;j<TCreate.Length;j++)
while (TCreate[j].IsAlive)
Thread.Sleep(10);
我需要知道如何在java中做到这一点。
MyTestClass qryCompoents=new MyTestClass();
for(int i=0;i<ThreadSize;i++)
{
switch(obj.getQueryLevelValue(i)) //Decide according to level
{
case 1:
qryCompoents.prepareAndProcess_I(obj.getQueryString(i),obj,i);
break;
case 2:
qryCompoents.prepareAndProcess_II(obj.getQueryString(i),obj,i);
break;
}
}
如果你需要任何细节,请告诉我。
如果我转换这个
Thread[] TCreate = new Thread[numExpression];
for(int i=0;i<numExpression;i++)
{
TCreate[i] = new Thread(new Runnable() {
public void run() {
switch(obj.getQueryLevelValue(i)) //Decide according to level
{
case 1:
qryCompoents.prepareAndProcess_I(obj.getQueryString(i),obj,i);
break;
case 2:
qryCompoents.prepareAndProcess_II(obj.getQueryString(i),obj,i);
break;
}
}
});
TCreate[i].setName("URL"+i);
TCreate[i].start();
}
for (int j = 0; j < TCreate.length; j++)
while (TCreate[j].isAlive())
Thread.sleep(5);
显示错误:无法引用在其他方法中定义的内部类中的非最终变量"obj"
提前感谢
它非常模拟。java有一个Runnable
接口,而不是Delicates,java有setName
方法,而不是C#的Name
属性。除此之外,差异很小:
Thread[] TCreate = new Thread[iThreadSize];
for (int i = 0; i < TCreate.length; i++) {
TCreate[i] = new Thread(new Runnable() {
public void run() {
lst.Add(this.getResult(url));
}
});
TCreate[i].setName("URL"+i);
TCreate[i].start();
}
for (int j = 0; j < TCreate.length; j++)
while (TCreate[j].isAlive())
Thread.sleep(10);
至于您的obj
变量,我不知道它是什么,您可以尝试声明它为final
但请注意,final
引用不能更改,但在您的情况下,它可能只是起作用
`final Object obj = ....;`
使用ThreadPool可以执行以下操作。
// only needed if you don't want to reuse the pool.
ExecutorService executor = Executors.newCachedThreadPool();
// ----
List<Future<Result>> results = new ArrayList<Future<Result>>();
for (int i = 0; i < iThreadSize; i++)
results.add(executor.submit(new Callable<Result>() {
public Result call() {
return getResult(url));
}
});
for(Future<Result> future: results)
lst.add(future.get());
// ----
// only needed if you don't want to reuse the pool.
executor.shutdown();
注意,您也可以使用它来获取组的所有活动线程:
Thread[] activeThreads = new Thread[Thread.activeCount];
Thread.enumerate( activeThreads );