Knapsack problem using Greedy Approach in java

[riteshyadav27]

@Kavya-24 I want to add Knapsack problem using Greedy Approach in java in Algorithm . Please Assign me this task and add a label of hacktoberfest.

[Kavya-24]

@riteshyadav27 go ahead

[riteshyadav27]

I have added the file . You can check it If there is any need to update then let me know. Will you please add hacktoberfest label 🙌

[Kavya-24]

Merged by #261 Closed by #261 Great work @riteshyadav27 :)

[riteshyadav27]

Thank You !!