Java Convert Integer to Long

In Java, we can use Long.valueOf() to convert an Integer to a Long

package com.mkyong.example;
public class TestInteger {
    public static void main(String[] args) {
        Integer num = 1;
        System.out.println(num);            // 1
        Long numInLong = Long.valueOf(num);
        System.out.println(numInLong);      // 1