【Java 基础】Java垃圾回收机制 finalize() 方法

finalize() 方法

public class FinalizationDemo {
public static void main(String[] args) {
Cake c1 = new Cake(1);
Cake c2 = new Cake(2);
Cake c3 = new Cake(3);

c2 = c3 = null;
System.gc(); //调用Java垃圾收集器
}
}

class Cake extends Object {
private int id;
public Cake(int id) {
this.id = id;
System.out.println("Cake Object " + id + "is created");
}

protected void finalize() throws java.lang.Throwable {
super.finalize();
System.out.println("Cake Object " + id + "is disposed");  //这里就是在 对象 被回收前  会被执行的代码段
}
}