Question

Define a class Horse with two attributes, a string name and an

integer numLegs. Write a two parameter constructor and

  a toString() method.

*Write a class named Coll3 with a static method

  "updateName". There are three parameters to the method: a

  collection, an old name, and a new name. For every horse in the

collection, if it has the same name as the parameter oldname, then

  replace the horse's name with the parameter new name.

  example: updateName({[X,4],[G,4],[X,3]}, X, Y) changes the

  collection to {[Y,4],[G,4],[Y,3]}.

Answer 1

CODE IN JAVA:

Horse.java file:

public class Horse {
   String name ;
   int numLegs ;
   public Horse(String name, int numLegs) {
       this.name = name;
       this.numLegs = numLegs;
   }
   public String toString() {
       return "Horse [name=" + name + ", numLegs=" + numLegs + "]";
   }
  
  
}

Coll3.java file:

import java.util.* ;
public class Coll3 {
   public static void updateName(ArrayList<Horse> horses, String oldName, String newName) {
       for(int i = 0 ; i < horses.size() ; i++) {
           Horse temp = horses.get(i);
           if(temp.name.contentEquals(oldName))
               temp.name = newName ;
       }
   }
}