java中静态块、main方法、构造块、构造方法的执行顺序复习

写此文的目的是复习java中静态块、main方法、构造块、构造方法的执行顺序，直接运行下面的代码即可一目了然，不再多说。

/**
* 运行父类main方法各个块作用域的执行顺序：
* static块（且仅仅执行一次） -> main方法 -> 构造块 -> 构造方法
*/
public class Parent {

private int age = 0;
private String name = null;
private static String company = null;

static {
System.out.println("Parent static block runing");
company = "parent-ahik";
}

{
System.out.println("Parent constructor block runing");
this.name = "parent";
}

public Parent() {
System.out.println("Parent construct method Parent() runing");
this.age = 28;
}

public Parent(int age) {
System.out.println("Parent construct method Parent(int age) runing");
this.age = age;
}

@Override
public String toString() {
return "Parent{" +
"age=" + age +
", name='" + name + '\'' +
", company= '" + company + "' " +
'}';
}

public static void main(String... args) {
System.out.println("Parent main runing");
Parent p1 = new Parent();
System.out.println(p1);
Parent p2 = new Parent(33);
System.out.println(p2);

{
int i = 100;
System.out.println(i);
}

int i = 99;
System.out.println(i);
}

}

//////////////////////////////////////////////////////////////

/**
* 运行子类main方法各个块作用域的执行顺序：
* 父类static块（且仅仅执行一次）->
* 子类static块且仅仅执行一次） ->
* 子类 main方法 ->
* 父类构造块 ->
* 父类构造构造方法 ->
* 子类构造块 ->
* 子类构造方法
*/
public class Child extends Parent {

private int age = 0;
private String name = null;
private static String company = null;

static {
System.out.println("Child static block runing");
company = "child-ahik";
}

{
this.name = "Child";
System.out.println("Child construct block start runing");
}

public Child() {
super(66);
this.age = 99;
System.out.println("Child construct method Child() runing");
}

public Child(int age) {
super(77);
this.age = age;
System.out.println("Child construct method Child(int age) runing");
}

public static void main(String... args) {
System.out.println("Child main runing");
Child c1 = new Child();
System.out.println(c1);
Child c2 = new Child(100);
System.out.println(c2);
}

}