java priority queue comparator code example
Example 1: comparator for priority queue c++
class Foo
{
};
class Compare
{
public:
bool operator() (Foo, Foo)
{
return true;
}
};
int main()
{
std::priority_queue<Foo, std::vector<Foo>, Compare> pq;
return 0;
}
Example 2: priority queue in java
import java.util.PriorityQueue;
import java.util.Iterator;
class Main {
public static void main(String[] args) {
// Creating a priority queue
PriorityQueue<Integer> numbers = new PriorityQueue<>();
numbers.add(4);
numbers.add(2);
numbers.add(1);
System.out.print("PriorityQueue using iterator(): ");
//Using the iterator() method
Iterator<Integer> iterate = numbers.iterator();
while(iterate.hasNext()) {
System.out.print(iterate.next());
System.out.print(", ");
}
}
}