class static3
{
    public static int count=0;
    public int y;   
    public static void printSu(){
        System.out.println("count = " + count);
        // 불가...System.out.println("y = " + y);
    }
    public void printAll(){
        System.out.println("y = " + y);
    }
    public static3(int y){
        this.y=y;
        count++;
    }

}
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class static3Test
{   
    public static void main(String[] args)
    {
        static3 o1 = new static3(2);
        System.out.println(static3.count);
        o1.printAll();
        o1.printSu();
        static3.printSu();
    }
}