how to make a set of array in java?

Question

Since the equals function in array only check the instance, it doesn\'t work well with Set. Hence, I wonder how to make a set of arrays in java?

One possible way cou

Answer 1

You could create a wrapper class for your array and override hashcode and equals accordingly. For example:

public class MyArrayContainer {
int[] myArray = new int[100];
@Override
public boolean equals(Object other) {
     if (null!= other && other instanceof MyArrayContainer){
     MyArrayContainer o = (MyArrayContainer) other;
     final int myLength = myArray.length; 
     if (o.myArray.length != myLength){
         return false;
     }
     for (int i = 0; i < myLength; i++){
         if (myArray[i] != o.myArray[i]){
              return false;
         }
     }
     return true;
     }
     return false;
}

@Override
public int hashCode() {
     return myArray.length;
}   
}