求java大神，请分析以下代码，写出执行结果，并解释每行结果输出的原因。classPlate{publicPlate(){System.out.println("inPlateconstructor");}}classDinnerPlateextendsPlate{publi...

求java大神，请分析以下代码，写出执行结果，并解释每行结果输出的原因。class Plate {

public Plate() {

System.out.println("in Plate constructor");

}

}

class DinnerPlate extends Plate {

public DinnerPlate() {

System.out.println("in DinnerPlate constructor");

}

}

class Utensil {

Utensil() {

System.out.println("in Utensil constructor");

}

}

class Fork extends Utensil {

public Fork() {

System.out.println("in Fork constructor");

}

}

class Custom {

public Custom() {

System.out.println( "in Custom constructor");

}

}

public class PlaceSetting extends Custom {

Fork fk;

DinnerPlate pl;

public PlaceSetting() {

fk = new Fork();

pl = new DinnerPlate();

System.out.println("in PlaceSetting constructor");

}

public static void main(String[] args) {

PlaceSetting ps = new PlaceSetting();

}

}

展开