Printf function? If you see such an article, close it and continue Google.

Brother is not a computer professional, so he was poisoned by the printf function in the past. The first is hard to find, and the second is useless. He just output a printf. What is the purpose of programming? Do you think you are playing the Overlord game machine?

When I saw the printf book, I threw it away, so as not to crack your determination to enter the programming world.

I will close the article below.

Http://blog.csdn.net/ocean20/article/details/6277668

Goolge wants this, which is closer to the real world.

Method 1

Import java. Text. decimalformat;

Decimalformat df = new decimalformat ("000 ");
Print (DF. Format (1) + ". jpg ")

Method 2

S = string. Format ("% 05d", 123); // "00123"