GabowSCC

java.lang.Object
- edu.princeton.cs.algs4.GabowSCC

```
public class GabowSCC
extends java.lang.Object
```
The GabowSCC class represents a data type for determining the strong components in a digraph. The id operation determines in which strong component a given vertex lies; the areStronglyConnected operation determines whether two vertices are in the same strong component; and the count operation determines the number of strong components. The component identifier of a component is one of the vertices in the strong component: two vertices have the same component identifier if and only if they are in the same strong component.
This implementation uses the Gabow's algorithm. The constructor takes time proportional to V + E (in the worst case), where V is the number of vertices and E is the number of edges. Afterwards, the id, count, and areStronglyConnected operations take constant time. For alternate implementations of the same API, see KosarajuSharirSCC and TarjanSCC.
For additional documentation, see Section 4.2 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.

构造器概要

构造器
构造器说明

GabowSCC(Digraph G)
Computes the strong components of the digraph G.

方法概要

修饰符和类型	方法	说明
`int`	`count()`	Returns the number of strong components.
`int`	`id(int v)`	Returns the component id of the strong component containing vertex `v`.
`static void`	`main(java.lang.String[] args)`	Unit tests the `GabowSCC` data type.
`boolean`	`stronglyConnected(int v, int w)`	Are vertices `v` and `w` in the same strong component?

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - GabowSCC
```
public GabowSCC(Digraph G)
```
    Computes the strong components of the digraph G.
    
    参数:
    
    G - the digraph
- 方法详细资料
  - count
```
public int count()
```
    Returns the number of strong components.
    
    返回:
    
    the number of strong components
  - stronglyConnected
```
public boolean stronglyConnected(int v,
                                 int w)
```
    Are vertices v and w in the same strong component?
    
    参数:
    
    v - one vertex
    
    w - the other vertex
    
    返回:
    
    true if vertices v and w are in the same strong component, and false otherwise
    
    抛出:
    
    java.lang.IllegalArgumentException - unless 0 <= v < V
    
    java.lang.IllegalArgumentException - unless 0 <= w < V
  - id
```
public int id(int v)
```
    Returns the component id of the strong component containing vertex v.
    
    参数:
    
    v - the vertex
    
    返回:
    
    the component id of the strong component containing vertex v
    
    抛出:
    
    java.lang.IllegalArgumentException - unless 0 <= v < V
  - main
```
public static void main(java.lang.String[] args)
```
    Unit tests the GabowSCC data type.
    
    参数:
    
    args - the command-line arguments