嘿,我在代码中具有此功能:
public synchronized void finished()
{
howManyDone++;
log.append("Finished creating board "+this.howManyDone+"n");
if(howManyDone == boards.length)
JOptionPane.showMessageDialog(log, "All Boards Were Created.","Attention",JOptionPane.WARNING_MESSAGE);
}
我想添加到log.append命令中,evrey thread在sec中运行了多少。我试图这样做:
public synchronized void finished()
{
long start = System.nanoTime();
howManyDone++;
long end = System.nanoTime();
long estTime = end - start;
double seconds = (double)estTime/1000000000;
}
,而不是每次打印几秒钟:
log.append("Finished creating board " +this.howManyDone+ " in "+seconds+"n");
但是我在日志中获得的数字是这样的:6.00e-7等...我在做什么错?
谢谢
,除非您能够注意到线程启动工作的系统时间,否则将无法获得总运行时间。简单地在完成功能开始时将其调用是不够的。
对于一种解决方案,您可以创建一个Thread
子类,以跟踪其运行时间,这样:
public class TimedThread extends Thread {
private long startTime;
private long endTime;
public TimedThread(Runnable r) {
super(r);
}
@Override
public void run() {
startTime = System.nanoTime();
super.run();
endTime = System.nanoTime();
}
public long getRunDuration() {
return endTime - startTime;
}
}
然后使用TimedThread
S而不是Threads
,其中需要计时计算(假设您对代码的该部分进行控制)。