I have a text file that have a list of employee's Id and name correspond to it. All the IDs are unique. What I want to do is I want to read from the text file and then sort the Id in order then put it back into the text file. How can I do this in java? Can you write a code for it in java. For example: the text file text.txt contains Id    Name 3     Kark 1     Mia 5     Tyrus 2     John After sort, the text.txt will be 1     Mia 2     John 3     Karl 5    Tyrus

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.