Hi all,
I've a problem fixing the syntax error. I'm doing a function, randomGraphGenerator(int n) that will generate non-negative weighted complete graph with n vertices. Could you help me out on this.

``````public class randomGraphGenerator {
private final int n;
private int E;

/* create an empty randomGraphGenerator with n vertices. */

public randomGraphGenerator (int n) {
if (n < 0) throw new IllegalArgumentException("Number of vertices in a Graph must be nonnegative");
this.n = n;
this.E = 0;
for (int n = 0; n < n; n++) {
}
}

/* create a random randomGraphGenerator with n vertices and E edges. The expected running time is proportional to n + E. */

public randomGraphGenerator (int n, int E) {
this(n);
if (E < 0) throw new IllegalArgumentException("Number of edges in a Graph must be nonnegative");
for (int i = 0; i < E; i++) {
int n = (int) (Math.random() * n);
int w = (int) (Math.random() * n);
double weight = Math.round(100 * Math.random()) / 100.0;
Edge e = new Edge(n, w, weight);
}
}

/* create a weighted graph from input stream. */

public randomGraphGenerator (In in) {
for (int i = 0; i < E; i++) {
Edge e = new Edge(n, w, weight);
}
}

/* Copy constructor. */

public randomGraphGenerator (randomGraphGenerator G) {
this(G.n());
this.E = G.E();
for (int n = 0; n < G.n(); n++) {
// reverse so that adjacency list is in same order as original
Stack<Edge> reverse = new Stack<Edge>();
for (Edge e : G.adj[v]) {
reverse.push(e);
}
for (Edge e : reverse) {
}
}
}

/* Return the number of vertices in this graph. */

public int n() {
return n;
}

/* Return the number of edges in this graph. */

public int E() {
return E;
}

/* add the undirected edge e to this graph. */

int n = e.either();
int w = e.other(v);
E++;
}

/* Return the edges incident to vertex n as an Iterable.
* To iterate over the edges incident to vertex n, use foreach notation:
* <tt>for (Edge e : graph.adj(n))</tt>. */

}

/* Return all edges in this graph as an Iterable.
* To iterate over the edges in the graph, use foreach notation:
* <tt>for (Edge e : G.edges())</tt>. */

public Iterable<Edge> edges() {
Bag<Edge> list = new Bag<Edge>();
for (int n = 0; n < n; n++) {
int selfLoops = 0;
for (Edge e : adj(n)) {
if (e.other(n) > n) {
}

// only add one copy of each self loop
else if (e.other(n) == n) {
if (selfLoops % 2 == 0) list.add(e);
selfLoops++;
}
}
}
return list;
}

/* Return a string representation of this graph. */

public String toString() {
String NEWLINE = System.getProperty("line.separator");
StringBuilder s = new StringBuilder();
s.append(n + " " + E + NEWLINE);
for (int n = 0; n < n; n++) {
s.append(n + ": ");
for (Edge e : adj[n]) {
s.append(e + "  ");
}
s.append(NEWLINE);
}
return s.toString();
}

/* Test client. */

public static void main(String[] args) {
In in = new In(args[0]);
randomGraphGenerator G = new randomGraphGenerator(in);
StdOut.println(G);
}
}
``````

I doubt that anyone will study 139 lines of code to find your syntax error. Why not make it a bit easier by posting the exact complete error message?

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.