SecurityManager类的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()方法用于在被调用期间返回要在其中创建任何新线程的线程组，否则，当在调用期间没有与其相关的新创建线程时，它将返回当前线程的线程组。

• 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()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

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

  getThreadGroup()方法在返回线程组时不会引发异常。

Syntax:

句法：

    public ThreadGroup getThreadGroup();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

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.

该方法的返回类型为ThreadGroup ，它返回实例化任何新线程的线程组。

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 manager
System.setProperty("java.security.policy", "file:/C:/java.policy");
// Instantiating a SecurityManager object
SecurityManager smgr = new SecurityManager();
// By using setSecurityManager() method is to set the
// security manager
System.setSecurityManager(smgr);
// By using getThreadGroup() method is to retrieve the
// Thread Group
ThreadGroup tg = smgr.getThreadGroup();
// Display tg
System.out.println("smgr.getThreadGroup() = " + tg);
}
}

Output

输出量

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

翻译自: https://www.includehelp.com/java/securitymanager-getthreadgroup-method-with-example.aspx