获取list中相邻且相等的元素下标组（开始下标与结束下标）

//获取list中相邻且相等的坐标组（开始下标与结束下标）
public List<Interval> findEqualIntervals(List<String> strings){
    List<Interval> intervals = new ArrayList<>();
    int start = -1;
    for(int i = 0, i < strings.size(); i++ ){
        if(i == 0 || !strings.get(i).equals(strings.get(i - 1))){
            start = i;
        } else if (i == strings.size() -1 || !strings.get(i).equals(strings.get(i + 1))){
            intervals.add(new Interval(start,i))
         }
    }
    return intervals ;
}

@Data
@AllArgConstructo
@NoArgConstructor 
public class Interval{

    private int start;
    private int end;

}