linux工作进程状态显示---------top命令

java 对象的创建过程在thinking in java 中原话：
1. Even though it doesn’t explicitly use the static keyword, the constructor is actually a
static method. So the first time an object of type Dog is created, or the first time a
static method or static field of class Dog is accessed, the Java interpreter must
locate Dog.class, which it does by searching through the classpath.

2. As Dog.class is loaded (creating a Class object, which you’ll learn about later), all of
its static initializers are run. Thus, static initialization takes place only once, as the
Class object is loaded for the first time.
3. When you create a new Dog( ), the construction process for a Dog object first
allocates enough storage for a Dog object on the heap.
4. This storage is wiped to zero, automatically setting all the primitives in that Dog
object to their default values (zero for numbers and the equivalent for boolean and
char) and the references to null.
5. Any initializations that occur at the point of field definition are executed.
6. Constructors are executed. As you shall see in the Reusing Classes chapter, this might
actually involve a fair amount of activity, especially when inheritance is involved.

附件为实例代码，从实例代码可以很清晰地看出对象的初始化过程。