有的,將它們全部寫在同一行裡,哈哈。
public class Parent {
    protected int i;
 
    public Parent(int i) { 
        this.i = i;
    }
}
 
public class Child extends Parent {
    public Child(String s) {
        super(convertor(s));
    }
 
    private static int convertor(String s) { 
        return Integer.parseInt(s);
    }
}