finalizationdemo.java

来自「所学课程的编码。java的基础例子。可以练习java通过这些例子。。」· Java 代码 · 共 34 行

/*
 * David Java File Created on 2007-10-7
 * 
 * TODO To change the template for this generated file go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
package chap05;

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");
    }
}

public class FinalizationDemo {

    public static void main(String[] args) {
        Cake a1 = new Cake(1);
        Cake a2 = new Cake(2);
        Cake a3 = new Cake(3);

        // To dispose the objects a2 and a3
        a2 = a3 = null;
        System.gc(); // Invoke the Java garbage collector
    }
}