Python to Java translation
<p>i get quite short code of algorithm in python, but i need to translate it to Java. I didnt find any program to do that, so i will really appreciate to help translating it.</p>

<p>I learned python a very little to know the idea how algorithm work.</p>

<p>The biggest problem is because in python all is object and some things are made really very confuzing like </p>

<pre><code>sum(self.flow[(source, vertex)] for vertex, capacity in self.get_edges(source))
</code></pre>

<p>and "self.adj" is like hashmap with multiple values which i have no idea how to put all together. Is any better collection for this code in java?</p>

<p>code is:</p>

<pre><code>class FlowNetwork(object):
    def __init__(self):
        self.adj, self.flow, = {},{}

    def add_vertex(self, vertex):
        self.adj[vertex] = []

    def get_edges(self, v):
        return self.adj[v]

    def add_edge(self, u,v,w=0):
        self.adj[u].append((v,w))
        self.adj[v].append((u,0))
        self.flow[(u,v)] = self.flow[(v,u)] = 0

    def find_path(self, source, sink, path):
        if source == sink:
            return path
        for vertex, capacity in self.get_edges(source):
            residual = capacity - self.flow[(source,vertex)]
            edge = (source,vertex,residual)
            if residual &gt; 0 and not edge in path:
                result = self.find_path(vertex, sink, path + [edge])
                if result != None:
                    return result

    def max_flow(self, source, sink):
        path = self.find_path(source, sink, [])
        while path != None:
            flow = min(r for u,v,r in path)
            for u,v,_ in path:
                self.flow[(u,v)] += flow
                self.flow[(v,u)] -= flow
                path = self.find_path(source, sink, [])
        return sum(self.flow[(source, vertex)] for vertex, capacity in self.get_edges(source))
g = FlowNetwork()
map(g.add_vertex, ['s','o','p','q','r','t'])
g.add_edge('s','o',3)
g.add_edge('s','p',3)
g.add_edge('o','p',2)
g.add_edge('o','q',3)
g.add_edge('p','r',2)
g.add_edge('r','t',3)
g.add_edge('q','r',4)
g.add_edge('q','t',2)
print g.max_flow('s','t')
</code></pre>

<p>result of this example is "5".</p>

<p>algorithm find max flow in graph(linked list or whatever) from source vertex "s" to destination "t".</p>

<p>Many thanks for any idea</p>
