JAVA 类初始化顺序

1.static 变量首先初始化
2.static模块次之
3. 最后才是构造函数

package ChuShiHua;

/*
 * 结果就是static 变量第一个被初始化
 * static 模块第二被初始化
 * 接下来才是构造函数的初始化
 */
public class ChuShiHua {

    static String a = "string - a";
    static String b;

    String c = "string - c";
    String d;

    static {
        printStatic("before static");
        b = "string - b";
        printStatic("after static");
    }

    public static void printStatic(String title){
        System.out.println("----------------" + title + "----------------");
        System.out.println("a = \"" + a + "\"");
        System.out.println("b = \"" + b + "\"");
        //未初始化,不能使用
//      System.out.println("c = \"" + c + "\"");
//      System.out.println("d = \"" + d + "\"");
    }

    //构造函数
    public ChuShiHua() {
        print("before constructor");
        d = "string - d";
        print("after constructor");
    }

    public void print(String title) {
        System.out.println("----------------" + title + "----------------");
        System.out.println("a = \"" + a + "\"");
        System.out.println("b = \"" + b + "\"");
        System.out.println("c = \"" + c + "\"");
        System.out.println("d = \"" + d + "\"");
    }

    public static void main(String[] args) {
        new ChuShiHua();
        }
    }