(1)变量定义的先后顺序决定
初始化顺序,即使变量定义散布在方法定义之间,
他们仍旧会在方法被调用之前得到初始化,构造方法也是特殊的方法
(2)执行顺序:静态块, 静态变量,非静态变量,构造方法
每次在
创建对象的时候非静态变量都会被初始化
静态对象只会在类加载的时候被初始化一次
?
class="java">public class Initialization {
static Table table = new Table();
static Cupboard cupboard = new Cupboard();
@Test
public void test() {
System.out.println("start...");
new Cupboard();
System.out.println("restart...");
new Cupboard();
table.method(1);
cupboard.method(1);
}
}
class Bowl {
public Bowl(int maker) {
System.out.println("Bowl " + maker);
}
public void method(int maker){
System.out.println("Bowl method " + maker);
}
}
class Table{
static Bowl bowl1 = new Bowl(1);
Table(){
System.out.println("Table ");
bowl2.method(2);
}
public void method(int maker){
System.out.println("Table method " + maker);
}
static Bowl bowl2 = new Bowl(2);
}
class Cupboard{
Bowl bowl3 = new Bowl(3);
static Bowl bowl4 = new Bowl(4);
Cupboard(){
System.out.println("Cupboard ");
bowl4.method(2);
}
public void method(int maker){
System.out.println("Cupboard method " + maker);
}
static Bowl bowl5 = new Bowl(5);
}
?结果:
Bowl 1
Bowl 2
Table?
Bowl method 2
Bowl 4
Bowl 5
Bowl 3
Cupboard?
Bowl method 2
start...
Bowl 3
Cupboard?
Bowl method 2
restart...
Bowl 3
Cupboard?
Bowl method 2
Table method 1
Cupboard method 1