Write a complete program in Java using JOptionPane to show that researchers have found that when a book written in the English language is analyzed for letter frequencies, the expected order of the eleven most frequent letters beginning with the most frequent is: E-T-O-I-N-S-H-R-D-L-U. Your problem is to find and print the most frequent eleven letters appearing from the below text. Ties will be decided in favor of the lower letter of the alphabet.

text.txt

Our environment is affected by our daily actions. The earth is plagued with land, air and water pollution. Some of the problems we face on earth are: deforestation, nuclear waste, acid rain, global warming, overpopulation and some animals are endangered.