class StaticDemo1{
	static int x=10;
	int y=20;
	static void show(){
		System.out.println("static method output: static int x= "+ x);
	}
	static void show( int x){//static不能掉
		System.out.println("method output: "+x);
	}
	public static void main(String args[]){
		show();
		x+=100;show(555);//靜態(tài)方法中只能操作靜態(tài)變量，若出現(xiàn) y+=99999;就錯了
		System.out.println("x changed. x="+x+"\n");
	    
		StaticDemo1 object=new StaticDemo1();
		object.show();//這里創(chuàng)建對象了。
		object.x+=1000;
		object.y+=9900;
		System.out.println("static int x="+StaticDemo1.x);
		System.out.println("static int x="+object.x);
		System.out.println("int y="+object.y);
	}
}