In continuation of the previous text第5章:并发与竞态条件-3:The Linux Semaphore Implementation, lets GO ahead.
Using Semaphores in scull
The semaphore mechanism gives scull a tool that can be used to avoid race conditions while acces…
一.继承方式
1.单继承
public class A{
}
public class B extends A{
}
2.多层继承
public class A{
}
public class B extends A{
}
public class C extends B{
} 3.不同类继承同一个类
public class A{
}
public class B extends A{
}
public class C exten…