static class Test{

public Test(Integer id,float cur,float total){
this.id = id;
this.curVal = cur;
this.totalVal = total;
}

public Integer id;
public float curVal;
public float totalVal;

}

public static void main(String[] args) {
Test one = new Test(10,7.66f,928.09f);
Test two = new Test(9,6.56f,920.43f);
Test three = new Test(8,4.79f,913.87f);
Test four = new Test(7,6.23f,909.08f);

Stream.of(one,two,three,four).sorted(Comparator.comparing(t -> t.id))
.reduce((prev, cur) -> {
cur.totalVal += prev.curVal;
return cur;
});
System.out.println(one.totalVal);
}