1 //1 无向图的邻接矩阵实现 时间复杂度:O(n^2) 空间复杂度:O(n^2)
2 class Graph
3 {
4 public int[][] adjacencyMatrix; //邻接矩阵
5 public int vexnum; //边数
6 public int arcnum; //顶点数
7 public char[] vexs; //顶点数组
8
9 public Graph(int vexnum, int arcnum)
10 {
11 this.vexnum = vexnum;
12 this.arcnum = arcnum;
13 this.adjacencyMatrix = new int[vexnum][vexnum];
14 this.vexs = new char[vexnum];
15 }
16
17 public void createUDG()
18 {
19 //1 创建顶点数组
20 Scanner input = new Scanner(System.in);
21 for(int i = 0; i < this.vexnum; i++)
22 this.vexs[i] = input.next().charAt(0);
23
24 //2 初始化邻接矩阵
25 for(int j = 0; j < this.vexnum; j++)
26 for(int k = 0; k < this.vexnum; k++)
27 this.adjacencyMatrix[j][k] = 0;
28
29 //3 根据顶点创建邻接矩阵
30 for(int p = 0; p < this.arcnum; p++)
31 {
32 char a = input.next().charAt(0);
33 char b = input.next().charAt(0);
34 int i = this.locateVex(a);
35 int j = this.locateVex(b);
36 this.adjacencyMatrix[i][j] = this.adjacencyMatrix[j][i] = 1; //对称阵
37 }
38 }
39
40 public int locateVex(char vex)
41 {
42 int i;
43 for(i = 0; i < this.vexs.length && vex != this.vexs[i]; i++);
44 return i;
45 }
46 }
47
48 //2 有向图的邻接矩阵实现 时间复杂度:O(n^2) 空间复杂度:O(n^2)
49 class Graph
50 {
51 public int[][] adjacencyMatrix;
52 public int vexnum;
53 public int arcnum;
54 public char[] vexs;
55
56 public Graph(int vexnum, int arcnum)
57 {
58 this.vexnum = vexnum;
59 this.arcnum = arcnum;
60 this.adjacencyMatrix = new int[vexnum][vexnum];
61 this.vexs = new char[vexnum];
62 }
63
64 public void createDG()
65 {
66 Scanner input = new Scanner(System.in);
67 for(int i = 0; i < this.vexnum; i++)
68 this.vexs[i] = input.next().charAt(0);
69 for(int j = 0; j < this.vexnum; j++)
70 for(int k = 0; k < this.vexnum; k++)
71 this.adjacencyMatrix[j][k] = 0;
72 for(int p = 0; p < this.arcnum; p++)
73 {
74 char a = input.next().charAt(0);
75 char b = input.next().charAt(0);
76 int i = this.locateVex(a);
77 int j = this.locateVex(b);
78 this.adjacencyMatrix[i][j] = 1;
79 }
80 }
81
82 public int locateVex(char vex)
83 {
84 int i;
85 for(i = 0; i < this.vexs.length && vex != this.vexs[i]; i++);
86 return i;
87 }
88 }
1 //1 无向图的邻接表实现 时间复杂度: O(n+e) 空间复杂度: O(n+e)
2 class ArcNode //边结点
3 {
4 //public int info;
5 public int adjvex;
6 public ArcNode nextarc;
7
8 public ArcNode(int adjvex)
9 {
10 this.adjvex = adjvex;
11 this.nextarc = null;
12 }
13 }
14
15 class VexNode //顶点结点
16 {
17 public char data;
18 public ArcNode firstarc;
19
20 public VexNode(char data)
21 {
22 this.data = data;
23 this.firstarc = null;
24 }
25 }
26
27 class Graph
28 {
29 public VexNode[] vexs; //顶点数组
30 public int vexnum; //顶点数
31 public int arcnum; //边数
32
33 public Graph(int vexnum, int arcnum)
34 {
35 this.vexnum = vexnum;
36 this.arcnum = arcnum;
37 this.vexs = new VexNode[vexnum];
38 }
39
40 public void createUDG()
41 {
42 //1 创建顶点数组(顶点结点表)
43 Scanner input = new Scanner(System.in);
44 for(int i = 0; i < this.vexnum; i++)
45 this.vexs[i] = new VexNode(input.next().charAt(0));
46
47 //2 根据结点创建邻接表
48 for(int k = 0; k < this.arcnum; k++)
49 {
50 char a = input.next().charAt(0);
51 char b = input.next().charAt(0);
52 int i = this.locateVex(a);
53 int j = this.locateVex(b);
54 ArcNode a1 = new ArcNode(j);
55 //使用前插法插入边结点
56 a1.nextarc = this.vexs[i].firstarc;
57 this.vexs[i].firstarc = a1;
58 ArcNode a2 = new ArcNode(i);
59 a2.nextarc = this.vexs[j].firstarc;
60 this.vexs[j].firstarc = a2;
61 }
62 }
63
64 public int locateVex(char vex)
65 {
66 int i;
67 for(i = 0; i < this.vexs.length && vex != this.vexs[i].data; i++);
68 return i;
69 }
70 }
71
72 //2 有向图的邻接表实现 时间复杂度: O(n+e) 空间复杂度: O(n+e)
73 class ArcNode
74 {
75 //public int info;
76 public int adjvex;
77 public ArcNode nextarc;
78
79 public ArcNode(int adjvex)
80 {
81 this.adjvex = adjvex;
82 this.nextarc = null;
83 }
84 }
85
86 class VexNode
87 {
88 public char data;
89 public ArcNode firstarc;
90
91 public VexNode(char data)
92 {
93 this.data = data;
94 this.firstarc = null;
95 }
96 }
97
98 class Graph
99 {
100 public VexNode[] vexs;
101 public int vexnum;
102 public int arcnum;
103
104 public Graph(int vexnum, int arcnum)
105 {
106 this.arcnum = arcnum;
107 this.vexnum = vexnum;
108 this.vexs = new VexNode[vexnum];
109 }
110
111 public void createDG()
112 {
113 Scanner input = new Scanner(System.in);
114 for(int i = 0; i < this.vexs.length; i++)
115 this.vexs[i] = new VexNode(input.next().charAt(0));
116 for(int k = 0; k < this.arcnum; k++)
117 {
118 char a = input.next().charAt(0);
119 char b = input.next().charAt(0);
120 int i = this.locateVex(a);
121 int j = this.locateVex(b);
122 ArcNode a1 = new ArcNode(j);
123 a1.nextarc = this.vexs[i].firstarc;
124 this.vexs[i].firstarc = a1;
125 }
126 }
127
128 public int locateVex(char vex)
129 {
130 int i;
131 for(i = 0; i < this.vexs.length && vex != this.vexs[i].data; i++);
132 return i;
133 }
134 }
