Sorting a vector of objects using attribute of object class as comparator

Question

i would like to sort a vector of objects using an attribute of object class as comparator. let me explain, i'm not sure to be clear.
class MyObject{
String name;
int value1;
int value2;
int value3;
i've got a Vector made of MyObject objects, and i would sort it, for instance, into ascending numerical order of the value1 attribute. Could someone help me please?
KINSKI.

Answer 1

Vector does not implement a sorted collection, so you can't use a Comparator. Why don't you use a TreeSet? Then you couldclass MyObject
  String name;
  int value1;
  int value2;
  int value3;
  // Override equals() in this class to match what our comparator does
  boolean equals (Object cand)
    // Verify comparability; this will also allow subclasses.
    if (cand !instanceof MyObject)
      throw new ClassCastException();
    return value1 = cand.value1;
  // Provide the comparator for this class. Make it static; instance not required
  static Comparator getComparator ()
    // Return this class's comparator
    return new MyClassComparator();
  // Define a comparator for this class
  private static class MyClassComparator implements Comparator
    compare (Object cand1, Object cand2)
      // Verify comparability; this will also allow subclasses.
      if ((cand1 !instanceof MyObject) || (cand2 !instanceof MyObject))
        throw new ClassCastException();
      // Compare. Less-than return -1
      if ((MyObject) cand1.value1 < (MyObject) cand2.value1))
        return -1;
      // Greater-than return 1
      else if ((MyObject) cand1.value1 > (MyObject) cand2.value1))
        return 1;
      // Equal-to return 0.
      else
        return 0;
}then just pass MyObject.getComparator() (you don't need to create an instance) when you create the TreeSet.