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Java Thread checkAccess()用法及代碼示例


thread類的activeCount()方法判斷當前運行的線程是否有修改線程的權限。

用法

public final void checkAccess()

返回

它不返回任何值。

異常

SecurityException:如果不允許當前線程訪問該線程,則拋出此異常。

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");  
    }  
}

輸出:

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






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