java中的实例初始化

public class Foo {    //instance variable initializer    String s = "abc";    //constructor    public Foo() {        System.out.println("constructor called");    }    //static initializer    static {        System.out.println("static initializer called");    }    //instance initializer    {        System.out.println("instance initializer called");    }    public static void main(String[] args) {        new Foo();        new Foo();    }}

Output for above program :

static initializer calledinstance initializer calledconstructor calledinstance initializer calledconstructor called