SecurityManager類的getThreadGroup()方法 (SecurityManager Class getThreadGroup() method)

• getThreadGroup() method is available in java.lang package.

  getThreadGroup()方法在java.lang包中可用。

• getThreadGroup() method is used to return the thread group into which to create any new thread during the time this is being called otherwise it returns thread group of the current thread when no new thread created associated with it during the time this is being called.

  getThreadGroup()方法用于在被調用期間返回要在其中創建任何新線程的線程組，否則，當在調用期間沒有與其相關的新創建線程時，它將返回當前線程的線程組。

• getThreadGroup() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getThreadGroup()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• getThreadGroup() method does not throw an exception at the time returning thread group.

  getThreadGroup()方法在返回線程組時不會引發異常。

Syntax:

句法：

public ThreadGroup getThreadGroup();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is ThreadGroup, it returns the thread group into which to instantiate any new thread.

該方法的返回類型為ThreadGroup ，它返回實例化任何新線程的線程組。

Example:

例：

// Java program to demonstrate the example // of ThreadGroup getThreadGroup() method of SecurityManager import java.security.*;public class GetThreadGroup {public static void main(String[] args) {// By using setProperty() method is to set the policy property // with security managerSystem.setProperty("java.security.policy", "file:/C:/java.policy");// Instantiating a SecurityManager objectSecurityManager smgr = new SecurityManager();// By using setSecurityManager() method is to set the// security managerSystem.setSecurityManager(smgr);// By using getThreadGroup() method is to retrieve the// Thread GroupThreadGroup tg = smgr.getThreadGroup();// Display tgSystem.out.println("smgr.getThreadGroup() = " + tg);} }

Output

輸出量

smgr.getThreadGroup() = java.lang.ThreadGroup[name=main,maxpri=10]

翻譯自: https://www.includehelp.com/java/securitymanager-getthreadgroup-method-with-example.aspx

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