本文实例为大家分享了Java实现Floyd算法求最短路径的具体代码,供大家参考,具体内容如下
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import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class TestMainIO {
/**
* @param args
* @throws FileNotFoundException
*/
public static void main(String[] args) throws FileNotFoundException {
TestMainIO test_print = new TestMainIO();
int [][] G = test_print.intputGragh( "D:\\Users\\test.txt" , 6 );
int [][] Dis = test_print.floyd(G, 6 );
test_print.printG(Dis, 6 );
}
public void printG( int [][] G, int n){
for ( int i= 0 ;i<n;i++){
for ( int j= 0 ;j<n;j++){
System.out.println(i+ "->" +j+ " " +G[i][j]);
}
}
}
public int [][] intputGragh(String path , int num) throws FileNotFoundException{
int [][] G = new int [num][num];
for ( int i= 0 ;i<num;i++){
for ( int j= 0 ;j<num;j++){
G[i][j]= 999 ;
}
}
Scanner in = new Scanner( new FileInputStream(path));
while (in.hasNext()) {
int i = in.nextInt();
int j = in.nextInt();
int weight = in.nextInt();
G[i][j] = weight;
}
return G;
}
public int [][] floyd( int [][] G, int n){
int [][] Dis= new int [n][n];
for ( int q= 0 ;q<n;q++){
for ( int w= 0 ;w<n;w++){
Dis[q][w]=G[q][w];
}
}
for ( int k = 0 ; k < n; k++){
for ( int i= 0 ; i < n; i++ ){
for ( int j= 0 ; j < n; j++){
if (Dis[i][j]>Dis[i][k]+Dis[k][j]){
Dis[i][j]=Dis[i][k]+Dis[k][j];
}
}
}
}
return Dis;
}
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/limao314/article/details/14451193