Java Thread checkAccess()方法

Thread类的activeCount()方法确定当前运行的线程是否具有修改线程的权限。

语法

public final void checkAccess()

返回
此方法不会返回任何值。

异常

• SecurityException：如果不允许当前线程访问该线程，则抛出此异常。

示例

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");    
    }    
}

执行上面示例代码，得到以下结果：

Thread-0 has access
Thread-1 has access
Thread-0 finished executing
Thread-1 finished executing