how to make a hollow square of asterisks by entering a size of side by user,
for example if 4 is entered then, it will be print,
* * * * * * * * * * * * of 4*4.
With a Scanner or InputStreamReader and a for loop and an if statement with one else if and an else.
You just copy/pasted your assignment without even a moment taken to explain what help you need. That's highly disrepestectful to the many people who give their time to help others here.
There are lots of people here who will freely give their time to help you become the best Java programmer you can be. There's nobody here who is interested in helping you cheat or doing your homework for you.
DaniWeb Member Rules (which you agreed to when you signed up) include:
"Do provide evidence of having done some work yourself if posting questions from school or work assignments"
Post what you have done so far and someone will help you from there.
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.