此段代码注释求解
class X{
Y b = new Y();
X() {
super();
System.out.print("X");
}
}
class Y {
int a = 19;
Y() {
System.out.print("Y");
}
}
public class Z extends X {
Y y = new Y();
Z() {
super(); //此处求解为什么不访问父类的无参构造
System.out.print("Z");
}
public static void main(String[] args) {
new Z();
}
}
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