java报错：进行语法分析时已到达文件结尾

class StaticSuper{
 
static {
System,out.println("super static block");
}

StaticSuper(){
System.out.println("super constructor");


}
}

public class StaticTests extends StaticSuper{

static int rand;

static {
rand = (int) (Math.random()*6);
System.out.println("Static block "+rand);
}

StaticTests(){       //就这里一直提示：进行语法分析时已到达文件结尾  下面有个} 标记  但是我查了好几遍，重写了好几遍，拢共就这么几个括号没问题啊！
System.out.println("constructor");
}

public static void main (String [] args){
System.out.println("in main");
StaticTests st = new StaticTests();
}
}

要怎么改啊，目前还没学到异常检测