Java - Swapping Values and Keys in one Map?
问题 I am making an encrypt and decrypt program for my programming class, however I am a year ahead of the group so I thought I'd simplify things by using what I learned last year. I decided to use a Tree Map. What the program does is it takes in a file, reads the first line which contains the encrypt data of how the letters will be coded. It is in a format such as "A->B","B->C","C->A" etc. and then a blank line for line 2 and the third line contains the message. I used reg. expressions to remove