子类代码为什么无法编译，求教谢谢！

Question

public class Fruit
{
public double weight;
public void info()
{
System.out.println("我是一个水果！重" + weight + "g!");
}
}

public class Apple extends Fruit
{
public static void main(String[] args)
{
Apple a = new Apple();
a.weight = 56;
a.info();
}
}

Answer 1

在Apple中加个super();放在第一行