import java.util.Stack;public class MinimumSpanningTree {private MGraph mgraph = new MGraph();public MinimumSpanningTree() {}public void createMST() {Closedge[] closedge = new Closedge[MGraph.NODECOUNT + 1];Stack<Integer> U = new Stack<Integer>();// 先把编号为1的节点放入已联通集合U.push(1);int[][] edgeValue = this.mgraph.getEdgeValue();for (int i = 2; i <= MGraph.NODECOUNT; i++) {closedge[i] = new Closedge();closedge[i].adjvex = 1;closedge[i].lowcost = edgeValue[1][i];// System.out.print(closedge[i].lowcost + "");}System.out.println();int minConnecEdge = 9999;int nodeNum = 0;while (U.size() < MGraph.NODECOUNT) {minConnecEdge = 9999;for (int i = 2; i <= MGraph.NODECOUNT; i++) {closedge[i].lowcost = this.getMin(closedge[i].lowcost,edgeValue[U.peek()][i]);// System.out.print("i="+i+":"+closedge[i].lowcost + "");if (closedge[i].lowcost > 0&& closedge[i].lowcost < minConnecEdge) {minConnecEdge = closedge[i].lowcost;nodeNum = i;}}// System.out.println(nodeNum);U.push(nodeNum);closedge[nodeNum].lowcost = 0;// System.out.println(U.size());}for (int i = 1; i <= MGraph.NODECOUNT; i++) {System.out.println(U.pop());}}private int getMin(int a, int b) {return a < b ? a : b;}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubMinimumSpanningTree mst = new MinimumSpanningTree();mst.createMST();}}class Closedge {int adjvex;int lowcost;}public class MGraph {public final static int NODECOUNT = 6;// private int[][] graph = new int[NODECOUNT][NODECOUNT];private int[][] edgeValue = { { 0, 0, 0, 0, 0, 0, 0 },{ 0, 0, 6, 1, 5, 9999, 9999 }, { 0, 6, 0, 5, 9999, 3, 9999 },{ 0, 1, 5, 0, 5, 6, 4 }, { 0, 5, 9999, 5, 0, 9999, 2 },{ 0, 9999, 3, 6, 9999, 0, 6 }, { 0, 9999, 9999, 4, 2, 6, 0 } };public int[][] getEdgeValue() {return edgeValue;}public void setEdgeValue(int[][] edgeValue) {this.edgeValue = edgeValue;}//private int[][] minimumSpanningTree = new int[NODECOUNT + 1][NODECOUNT + 1];public MGraph() {}@SuppressWarnings("unused")private void connectNode() {}public void printMGraph() {for (int i = 0; i < this.edgeValue[0].length; i++) {for (int j = 0; j < this.edgeValue[0].length; j++) {System.out.print(this.edgeValue[i][j] + "");}System.out.println();}}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubMGraph mg = new MGraph();mg.printMGraph();}}
