Code example for Stack

Methods: peekpoppushisEmpty

0
            insert(stack, val);
        } 
    } 
 
    private static void insert(Stack<Integer> stack, Integer val) {
        if (stack.isEmpty() || stack.peek() <= val) {
            stack.push(val);
        } else { 
            Integer x = stack.pop();
            insert(stack, val);
            stack.push(x);
        } 
    } 
} 
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