JAVA list object sorting plus deduplication problem

The object class implements inheriting the Comparable interface, rewriting the compareTo method to implement the sorting function, and rewriting the equals method to implement the deduplication function (deduplication according to ID)
public class TestAbilityAnalyze implements Comparable<TestAbilityAnalyze> {
private String abilityID;
/**
* ability name
*/
private String abilityName;
/**
* personal accuracy rate
*/
private double accuracy;
/**
* class accuracy rate
*/
private double averageByClassID;
/**
* grade accuracy rate
*/
private double averageByGradeID;

public String getAbilityID() {
return abilityID;
}

public void setAbilityID(String abilityID) {
this.abilityID = abilityID;
}

public String getAbilityName() {
return abilityName;
}

public void setAbilityName(String abilityName) {
this.abilityName = abilityName;
}

public double getAccuracy() {
return accuracy;
}

public void setAccuracy(double accuracy) {
this.accuracy = accuracy;
}

public double getAverageByClassID() {
return averageByClassID;
}

public void setAverageByClassID(double averageByClassID) {
this.averageByClassID = averageByClassID;
}

public double getAverageByGradeID() {
return averageByGradeID;
}

public void setAverageByGradeID(double averageByGradeID) {
this.averageByGradeID = averageByGradeID;
}

@Override
public int compareTo(TestAbilityAnalyze o) {
// TODO Auto-generated method stub
return (int) (this.getAccuracy() - o.getAccuracy());
}

public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (!(obj instanceof Test))
return false;
TestAbilityAnalyze other = (TestAbilityAnalyze) obj;
if (abilityID == null) {
if (other.abilityID == null)
return true;
else
return false;
} else {
if (abilityID.equals(other.abilityID))
return true;
else
return false;
}
}
}

Sort according to the correct rate, then use set to deduplicate
Collections.sort(analyzes);
Set<TestAbilityAnalyze> result = new TreeSet<>((o1, o2) -> o1.getAbilityID().compareTo(o2.getAbilityID())) ;
result.addAll(analyzes);