Java类加载器深入剖析

1、 ClassLoader（类加载器）

Java程序的生命周期

类的加载、连接与初始化

类加载陷阱实例

/**
 * @name: Singleton
 * @author: terwer
 * @date: 2022-02-12 13:51
 **/
class Singleton {
    private static Singleton singleton = new Singleton();
    public static int counter1;
    public static int counter2 = 0;

    private Singleton() {
        counter1++;
        counter2++;
    }

    public static Singleton getInstance() {
        return singleton;
    }
}

public class MyTest {
    public static void main(String[] args) {
        Singleton singleton = Singleton.getInstance();
        System.out.println("counter1 = " + singleton.counter1);
        System.out.println("counter2 = " + singleton.counter2);
    }
}

结果是