How can i improve this code?

Hi Everyone

i'm currently working on the Jar Guessing game , and i got it to work ( i would really appreciate it , if someone tests it out and comments what they think i will link my GitHub repo at the bottom of the post ) but i still have a little problem , when the user enters an illegal guess (higher than the maximum number of items in the jar or lower than 1 ) an IllegalArgumentException gets thrown (like i designed it to ) but the program stops prompting the user to guess , and i wasn't able to figure out on my own how to make it continue prompting .If someone can help me i'll really appreciate it . Another side question i have about the project is , what is meant by "encapsulating the I/O in a prompter class " ? I made a Prompter , but i'm not sure if the implementation is really good and if someone has any ideas how i can improve this program in general , i would really love to hear them.

this is the program : https://github.com/Melodie95/Treehouse-Project-1-