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class Cat{
public String name;
public int age;
public Cat(String name,int age){
System.out.println("Constructor");
this.name = name;
this.age = age;
}
{
System.out.println("non-static initial block");
// 这边为什么不报向前引用的错误
weight = 2.0;
// 注释下面的语句编译可以通过
System.out.println(weight);
}
double weight =2.3 ;
public String toString(){
return "Cat[name=" + name +" ,age= " + age +" ,weight= " + weight;
}
}
public class InitTest{
public static void main(String[] args){
Cat cat = new Cat("kitty",2);
System.out.println(cat);
Cat c2 = new Cat("Jefi",3);
System.out.println(c2);
}
}