内存图

方法区

Applicationmain()常量池：旺财

静态方法区static：和类一起加载

dog：引用变量名

cat：引用变量名

堆

Petnameageshout()

new Pet()：0x00001name = nullage = 0shout()

栈

public class Application { public static void main(String[] args) { Pet dog = new Pet(); dog.name = \"旺财\"; dog.age = 3; dog.shout(); Pet cat = new Pet(); }}

main()

public class Pet { public String name; public int age; public void shout() { System.out.println(\"叫了一声\"); }} 

new Pet()：0x00001name = \"旺财\"age = 3shout()