Java中static修饰一段代码，实现加载时运行的用法

package com.min.test;
class AA{
	
	// 加载时运行，与instance无关
    static{
        System.out.println("static block ");
    }
    
    AA() {
    	System.out.println("AA()");
    }
}
public class JavaTest {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		try {
			Class.forName("com.min.test.AA");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
//		AA a = new AA();
	}
}