I want to know how to compare the all array list element in the array list? Eg I want to compare element which is the largest number. Like comparing 1st element and 2nd element, 2nd element compares to the 3rd element. How to do it?
List <Product> productList= new ArrayList<>();
Can anyone give some example on how to compare with this variable?
productList.get(i).getPrice()
Thanks for help.
If you just want max value then use this:
public int getMax(ArrayList list){
int max = Integer.MIN_VALUE;
for(int i=0; i<list.size(); i++){
if(list.get(i) > max){
max = list.get(i);
}
}
return max;
}
and more good way is comparator:
public class compareProduct implements Comparator<Product> {
public int compare(Product a, Product b) {
if (a.getPrice() > b.getPrice())
return -1; // highest value first
if (a.getPrice() == b.getPrice())
return 0;
return 1;
}
}
and then just do this:
Product p = Collections.max(products, new compareProduct());
Integer.compare(a.getPrice(), b.getPrice())Compare some thing like this
for (int i = 0; i < productList.size(); i++) {
for (int j = i+1; j < productList.size(); j++) {
// compare productList.get(i) and productList.get(j)
}
}
productList.get(i) and max
forloop, and store the largest