Use the equals method in the override class to filter and use hashset

Override the equals method for a class
To use hashset for filtering, you must implement the hashcode method in the class. Because each hash table is different, add the set
Does not call the equals method.
// Public Boolean equals (Object OBJ ){
// System. Out. println ("2222222222222222 ");
// If (OBJ instanceof aa ){
// Aa a = (AA) OBJ;
// If (this. Name. Equals (A. getname () & (this. Age = A. getage ()))
// Return true;
// Else
// Return false;
//} Else
// Return false;
//}
//
// Public int hashcode (){
// System. Out. println ("1111111111111111 ");
// Return name. hashcode () + age;
//}
//

// Public String tostring (){
// Return "name =" + this. Name + "age =" + age;
//}