编辑代码

class Main {
	public static void main(String[] args) {
        long timestamp = System.currentTimeMillis();
        int timestampLength = (timestamp + "").length();
		System.out.printf("当前时间戳=%s", timestamp);
        System.out.println();        
        System.out.printf("时间戳长度=%s", timestampLength);
	}
}