Class loader:static

package classloader;

public class ClassLoaderDisplayDemo {
    public static void main(String[] args) {
        Person person = new Person();
        person.process();
    }
}

class Person {
    static {
        no = 5;//只能对后面的静态变量no赋值，不能进行其它操作
    }

    private static int no;//如果对no进行赋值操作，则上面static块中对no的赋值操作的结果会被此次的操作覆盖
    private String name = getClass().getName();

    {
        System.out.println("Block:" + name);
        System.out.println("Block:no-->" + no);
        no = no + 1;
        System.out.println("Block:no-->" + no);
    }

    static {
        no = no + 1;
        System.out.println("no:" + no);
    }

    public Person(String name) {
        this.name = name;
    }

    public Person() {
        System.out.println("Name:" + name);
    }

    public void process() {
        System.out.println("process-->Name:" + name);
    }
}

Output:

no:6
Block:classloader.Person
Block:no-->6
Block:no-->7
Name:classloader.Person
process-->Name:classloader.Person