Write a java program that replaces all the occurrences of a specified string from a text file with another string. Where the user enters the name or path of the file, then enters the string that he wants to remove, and then enters the string to be added in the file instead of removed string.

Here are examples when you run the code:

Example $1$:

Enter file name: test.txt

Enter the string you want to remove: Java

Enter the string you want to add: C$++$

Example $2$:

Enter file name or path: text.txt

Source file text.txt does not exist.