algorithm to find substring in a string (KMP Algorithm) | java coding algorithms



String Search Algorithm in java OR String Matching Algorithm in java: KMP Algorithm is one of the many string search algorithms which is better suited in scenarios where ‘pattern to be searched’ remains same whereas ‘text to be searched’ changes.

Knuth-Morris-Pratt Algorithm (KMP) detailed analysis
Understanding this would show us what a careful algorithmic thinker would code even for a small problem like this. This is one of the algorithms which is easy to implement but one needs lot of attention and hard work to understand the algorithm.

Problem Statement: lets assume we want to search for the pattern P in the text T.
T: [abcabdabcabdabcabdabdabc]
P: [abcabdabc]

This algorithm is executed in two phases.

  • Preprocessing Phase
  • Search Phase

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