How l can confirm this code c++ into java

A CH program to find single source longest distances in a DAG #include iostream #include Klist Sinclude adj A function used by longestPath stack int &stack) void topological Sortutil(int v, bool visited 1, public: Graph (int v) Constructor function to add an edge to graph void add Edge (int a, int v, int weight) Finds longest distances from given source vertex void longest Path (int s): 7447757 7685 57.7685