A Class Implementing Comparable : Comparator « Collections Data Structure « Java

1. Java
2. Collections Data Structure
3. Comparator

A Class Implementing Comparable

    
public class Time implements Comparable {
  private int hour, minute; 

  public Time(int hh, int mm) {
    this.hour = hh;
    this.minute = mm;
  }

  public int compareTo(Object o) {
    Time t = (Time) o;
    return hour != t.hour ? hour - t.hour : minute - t.minute;
  }

  public boolean equals(Object o) {
    Time t = (Time) o;
    return hour == t.hour && minute == t.minute;
  }

  public int hashCode() {
    return 60 * hour + minute;
  }
}
           
         
    
    
    
  

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