Java创建子类对象时的内存分配

定义一个父类

public class Animal {private String color;public String getColor() {return color;}public void setColor(String color) {this.color = color;}public void introduce(){System.out.println("my color is"+color);}}

定义一个子类

public class Dog extends Animal{private String nickName;public String getNickName() {return nickName;}public void setNickName(String nickName) {this.nickName = nickName;}public void introduce(){System.out.println("my color is"+super.getColor()+",my nickName is"+nickName);}public static void main(String[] args) {Dog dog=new Dog();dog.setColor("黑色");dog.setNickName("小黑");dog.introduce();}}

 创建子类对象时的内存分配图

总结：子类对象是使用父类对象的空间来存储继承的属性内容