成对定义 if 语句条件,并且仅在一个对象的一个​​参数上

Define if statement conditions by pairs, and on only one parameter of an object

我使用 jgrapht 库创建了一个有向图,我的顶点是 Point 个对象:

public static class Point {

  public int x;
  public int y;
  public String type;

  public  Point(int x, int y, String type) 
  {

    this.x = x;
    this.y = y;
    this.type = type;
  }
  @Override
    public String toString() {
    return ("[x="+x+" y="+y+" type="+type+ "]");
  }

  @Override
    public int hashCode() {
    int hash = 7;
    hash = 71 * hash + this.x;
    hash = 71 * hash + this.y;

    return hash;
  }



  @Override
    public boolean equals(Object other) 
  {
    if (this == other)
      return true;

    if (!(other instanceof Point))
      return false;

    Point otherPoint = (Point) other;
    return otherPoint.x == x && otherPoint.y == y;
  }
}

我可以像这样遍历所有顶点并获得每个点的后继点:*

 for (Point myPoint : directedGraph.vertexSet ()) {
      for (Point successor : Graphs.successorListOf (directedGraph, myPoint)){
 // Add if statement
 }
}

我需要成对定义 if 语句的条件,但只能针对一个或两个 Point 参数。例如,这些是我的观点:

public static Point startPoint = new Point(2, 6, "A");
public static Point firstPoint = new Point(2, 7, "A");
public static Point secondPoint = new Point(2, 8, "B");
public static Point thirdPoint = new Point(2, 9, "B");
public static Point fourthPoint = new Point(2, 10, "B");
public static Point fifthPoint = new Point(3, 7, "C");
public static Point sixthPoint = new Point(4, 7, "C");
public static Point seventhPoint = new Point(5, 7, "C");

我想要一个条件来确保 myPoint 和 successor 没有特定的 "type":

for (Point myPoint : directedGraph.vertexSet ()) {
          for (Point successor : Graphs.successorListOf (directedGraph, myPoint)){
     if ((myPoint,successor) != (myPoint.type.equals("A"), successos.type.equals("B") && (myPoint,successor)!= (myPoint.type.equals("A"), successos.type.equals("C")){
// Do what I want
      } 
     }
    }

所以我需要在几个点上设置条件,但只在我的 Point 对象的一个​​参数上设置条件 [这对(myPoint 和 successor)不能分别(类型A 和 B 型)和(A 型和 C 型)。

这样可以吗?我找不到这方面的任何资源(并且在表达我的问题时遇到了问题,所以它没有帮助)

调查javatuples you could make your own as described in this post

但它可能看起来不漂亮。你会做类似的事情,

//define your tuple class
class myTuple
{
 final String T1;
 final String T2;
 public myTuple(String t1, String t2)
{
  T1 = t1;
  T2 = t2;
}

if(myTupple(myPoint.type, successos.type) == myTupple("A", "B"))
{ /* do something */ }`

无论如何,我不认为你可以把它做得很漂亮,但你明白了。

我要做的是向 class 添加一个名为 "validateType" 或其他任何东西的静态方法,然后将这两个点传递给您在那里的检查