1 public class BasicTest { 2 public static void main(String[] args) { 3 System.out.println("m1:"); 4 Mimi m1=new Mimi(); 5 System.out.println("m2:"); 6 Mimi m2=new Mimi(); 7 } 8 } 9 10 class Mimi { 11 public static int si=0; 12 int di=si; 13 static{ 14 //首先执行 15 si++; 16 System.out.println("static block1: si="+si); 17 } 18 19 { 20 //si*=2; 21 System.out.println("block2: si="+si+", di="+di); 22 } 23 24 static{ 25 //首先执行 26 si++; 27 System.out.println("static block2: si="+si); 28 } 29 30 public Mimi() { 31 di=10; 32 System.out.println("constructor: si="+si+", di="+di); 33 si=500; 34 } 35 }
执行顺序是:
静态成员变量初始化
静态代码块调用
动态成员变量初始化
非静态代码块调用
构造方法调用
以下供练习:
1 public class TestPerson { 2 3 public static void main(String[] args) { 4 // TODO Auto-generated method stub 5 Person person = new Person(); 6 Person person2 = new Person(); 7 } 8 9 } 10 11 class Person { 12 public final String name; 13 public int age; 14 15 public Person() { 16 System.out.println("无参构造方法"); 17 } 18 19 { 20 System.out.println("代码块2"); 21 } 22 23 { 24 System.out.println("代码块1"); 25 name = "小明"; 26 } 27 28 static { 29 System.out.println("静态代码块2"); 30 } 31 32 static { 33 System.out.println("静态代码块1"); 34 } 35 36 37 38 public Person(int age) { 39 this.age = age; 40 //this.name = ""; 41 System.out.println("构造age方法"); 42 } 43 44 public void goToSchool() { 45 System.out.println(name + "goToSchool方法"); 46 } 47 }
结果:
静态代码块2
静态代码块1
代码块2
代码块1
无参构造方法
代码块2
代码块1
无参构造方法