Java父类子类加载

LoaderTest.java

package test;


/**
 * 
 * @author Administrator
 *
 */
public class LoaderTest {

    public static void main(String[] args) {
          A a;
          a = new AB();
          a = new AB();
          a = new AB("");
          a = new AB("");
    }
    
}

class A {
    
    static {
        System.out.println("this is parent A static");
    }
    
    
    public A() {
        System.out.println("A constructor");
    }
    
    public A(String a) {
        System.out.println("A constructor with string");
    }
}

class AB extends A {
    
    static {
        System.out.println("this is  B static");
    }
    
    public AB() {
        System.out.println("B constructor");
    }
    
    public AB(String b) {
        super(b);  // 没有指定调用父类的构造函数，默认调用无参构造函数
        System.out.println("B constructor with string");
    }
    
}