Thread
類的activeCount()
方法確定當前執行的執行緒是否具有修改執行緒的許可權。
語法
public final void checkAccess()
返回
此方法不會返回任何值。
異常
SecurityException
:如果不允許當前執行緒存取該執行緒,則丟擲此異常。範例
public class JavaCheckAccessExp extends Thread
{
public void run()
{
System.out.println(Thread.currentThread().getName()+" finished executing");
}
public static void main(String arg[]) throws InterruptedException, SecurityException
{
// creating the thread
JavaCheckAccessExp t1 = new JavaCheckAccessExp();
JavaCheckAccessExp t2 = new JavaCheckAccessExp();
// this will call the run() method
t1.start();
t2.start();
// Check for access permission of current running thread
t1.checkAccess();
System.out.println(t1.getName() + " has access");
t2.checkAccess();
System.out.println(t2.getName() + " has access");
}
}
執行上面範例程式碼,得到以下結果:
Thread-0 has access
Thread-1 has access
Thread-0 finished executing
Thread-1 finished executing