PleAse show codes in java

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1. Write a program which asks the user to enter an integer value, n. Declare an array of int's of size n. Find every prime number starting with 2, and write each into the next available cell in your array. Repeat this n times until your array is full. Use a while loop to do this. Then, using a for loop, compute the average of your prime numbers. Your n should be a positive integer less than or equal to 1000