有向图的邻接矩阵
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import java.io.IOException;
import java.util.Scanner;
//有向图的邻接矩阵的创建
public class MatrixDG {
private char[] mVexs;//顶点集合
private int[][] mMatrix;//邻接矩阵
//创建图,自己输入数据
public MatrixDG(){
//输入顶点数和边数
int vlen = readInt();
int elen = readInt();
if(vlen <1 || elen<1 || elen >(vlen*(vlen-1))){
System.out.println("error");
return ;
}
//初始化边数
mVexs = new char[vlen];
for(int i=0;i<vlen;i++){
mVexs[i] = readChar();
}
//初始化边
mMatrix = new int[vlen][vlen];
for(int i=0;i<elen;i++){
char c1 = readChar();
char c2 = readChar();
int p1 = getPosition(c1);
int p2 = getPosition(c2);
if(p1 == -1 || p2 == -1)
return ;
mMatrix[p1][p2] = 1;
}
}
//创建图,根据已有的数据
public MatrixDG(char[] vexs, char[][] edges){
//得到顶点数和边数
int vlen = vexs.length;
int elen = edges.length;
if(vlen <1 || elen<1 || elen >(vlen*(vlen-1))){
System.out.println("error");
return ;
}
//初始化顶点
mVexs = new char[vlen];
for(int i=0;i<vlen;i++){
mVexs[i] = vexs[i];
}
//初始化边数
mMatrix = new int[vlen][vlen];
for(int i=0;i<elen;i++){
char c1 = edges[i][0];
char c2 = edges[i][1];
int p1 = getPosition(c1);
int p2 = getPosition(c2);
if(p1 == -1 || p2 == -1)
return ;
mMatrix[p1][p2] = 1;
}
}
//从控制台得到int型数
private int readInt(){
Scanner scan = new Scanner(System.in);
return scan.nextInt();
}
//从控制台得到一字符
private char readChar(){
char ch = ‘0‘;
do{
try {
ch = (char) System.in.read();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}while(!((ch>=‘a‘&&ch<=‘z‘)||(ch>=‘A‘&&ch<=‘Z‘)));
return ch;
}
//获取字符在数组中的位置
private int getPosition(char ch){
for(int i=0;i<mVexs.length;i++){
if(mVexs[i] == ch)
return i;
}
return -1;
}
//打印邻接矩阵
private void print(){
for(int i=0;i<mVexs.length;i++){
for(int j=0;j<mVexs.length;j++)
System.out.print(mMatrix[i][j] + " ");
System.out.println();
}
}
}
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