Need help on code for 2) in java with input file please

1. Implement "Directed" Dijkstra's algorithm as defined in class. Input: An adjacent matrix in a file. (Note that the source vertex in this example is labeled with '0'. "inf" indicates initial distance from the source on diagonal and no-connection on non-diagonal positions.) Ex. inf 10 inf inf1 inf inf inf inf4 inf3 inf 5 inf inf inf 2 in inf inf Output: A spanning tree with a shortest distance of each node. Ex. The answer to the example above. (The values on the diagonal are the shortest distance of each vertex, respectively and the other non-zero values are the edge weights on the shortest spanning tree.) 0 0 0 0 0 0 0 0 0 10 10 10 10 2 3 4 6 23 4 6 2 3 9 10 10 10 2 3 2. (bonus points) Implement Bellman Ford Algorithm as covered in class 3. (bonus points) Implement DAG-based Shortest path algorithm as covered in class. A command line user interface has to be provided as follows: "Enter your input file name:" "Display the input adjacency matrix:" "Display the output adjacency matrix