เรียงลำดับข้อมูลด้วย Comparable

public class SimilarUser implements Comparable<SimilarUser>{

private String user;
private double score;

public String getUser() {
return user;
}

public void setUser(String user) {
this.user = user;
}

public double getScore() {
return score;
}

public void setScore(double score) {
this.score = score;
}

public int compareTo(SimilarUser o) {

double score_a=o.getScore();

double score_b = this.score;

return (int)(score_b*100) – (int)(score_a*100);
}

}