i have a program which select recent files from a directory and compress them into one file. but i want to stop the program if there is no files in the directory and display an error message like "There is no files in the deirectory" I tried append this: if(file.exists)...
When you say "stop this task", did you mean to stop in such a way that it's later recoverable (if yes, programmatically, using a condition which arises with in the same app? or external condition?) Are you running any other tasks in the same context? (Possibility of...
The above code displays the functionality of a conditional loop for restarting a function an infinite number of times. The only way to stop the program from restarting is to close the program. Use Recursion to Restart a Program importjava.util.*;importjava.util.Scanner;classMain{publicstaticvoid...
过期的suspend()、resume()、stop(): 分别对线程进行暂停、恢复、停止,但是这几个方法有问题。 suspend():调用后线程不会释放资源,会带着锁进入睡眠状态,容易引发死锁问题。 stop():终结一个线程是可能跟不会给线程释放资源的机会,也会导致不稳定。 安全地终止线程:自己通过标志控制是否停止,调用自定义的cancel(...
public static final int PROGRAM_CHANGE 192 public static final int SONG_POSITION_POINTER 242 public static final int SONG_SELECT 243 public static final int START 250 public static final int STOP 252 public static final int SYSTEM_RESET 255 public static final int TIMING_CLOCK 248 public static...
We’d recommend biting the bullet, getting a newer scanner, and not circumventing the very useful protections put in place precisely to stop you from running very 非常的Setup.exe文件,阻止你。 On the other hand you might find yourself in a perfectly valid situation where you’ve downloaded the...
Following example demonstates how to stop a thread by creating an user defined method run() taking the help of Timer classes' methods. importjava.util.Timer;importjava.util.TimerTask;classCanStopextendsThread{privatevolatilebooleanstop=false;privateintcounter=0;publicvoidrun(){while(!stop&&counter<...
// Java program to stop a thread with the help of// volatile boolean variableclassChildThreadextendsThread{// intially assign boolean variable with value as truevolatilebooleanthread_stop=true;// this method is defined to stop a threadpublicvoidstopThread(){thread_stop=false;}// this loop wil...
9.Can I combine the two techniques to produce a thread that may be safely "stopped" or "suspended"? Yes; it's reasonably straightforward. The one subtlety is that the target thread may already be suspended at the time that another thread tries to stop it. If thestopmethod merely sets th...