queue problems in java code example

Example 1: java queue

import java.util.*;

Queue<Integer> queue = new LinkedList<Integer>();
// use non-primative types when constructing

// to add a value to the back of queue:
queue.add(7);

// to remove and return front value:
int next = queue.remove();

// to just return front value without removing:
int peek = queue.peek();

Example 2: what is queue in java

Quque: accepts duplicates, does not have index,
First in first out order