JAVA (programing)

1. For a given positive integer n, output the first n primes. E.g. n=3, output: 2,3,5; n=7, output: 2,3,5,7,11,13,17.

2. For a given integer n>1, list all primes not exceeding n. E.g. n=10, output: 2,3,5,7; n=16, output: 2,3,5,7,11,13.

3.For a given integer n>1, output its prime factorization. E.g. n=8, output: 2^3; n=72, output: 2^3*3^2.