Java to sort list of custom object on the basis of string

Question

class Person 
 {
 private String name;
 private String profession;
}

profession has values:

• engineer
• Doctor<

Answer 1

Implement Comparable

Yes you can implement Comparable. Create a method compareTo(Person obj) and then write your custom logic. You can compare alphabetically or whatever other algorithm you want - for example engineer before doctor because he makes more money :) For alphabetic comparing you can do it like that:

class Person implements Comparable {

@Override
public int compareTo(Person o) {
    return this.profession.compareTo(o.getProfession());

  }
  private String name;
  private String profession;
}

After that you just use the Collections.sort