Java线程生命周期(Java thread life time)

 假设我有以下内容： 
 
public class A
{
    Thread t = new Thread(new Runnable() {
                      @Override
                            public void run() {

                    B b = new B();
                            }
                        });
    }

    class B{
     // long running process and alot of code
    }
 
 问题是，B类所做的所有过程和工作都是在线程t下进行的，或者只是在创建了B类的对象并且B类的工作开始时才更有效？ 

Suppose I have the following:
 
public class A
{
    Thread t = new Thread(new Runnable() {
                      @Override
                            public void run() {

                    B b = new B();
                            }
                        });
    }

    class B{
     // long running process and alot of code
    }
 
The question is that all process and work that class B does goes under thread t or just when the object of class B is created and work of class B starts t is no more available?

原文：https://stackoverflow.com/questions/32167248