Create SllidingWindow.java

[charu1110]

solved #6000 added a new file named SlidingWindow.java containing questions solved using sliding window techniques

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.37%. Comparing base (a163816) to head (0db6e1f).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6034   +/-   ##
=========================================
  Coverage     72.37%   72.37%           
  Complexity     4981     4981           
=========================================
  Files           652      652           
  Lines         17569    17569           
  Branches       3385     3385           
=========================================
  Hits          12716    12716           
  Misses         4373     4373           
  Partials        480      480           

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[charu1110]

please merge my request as my first contribution in hacktoberfest

[Chiefpatwal]

@charu1110 The slidingwindow directory has already been created, so you can close this issue. Feel free to add any algorithms to it if you'd like.