How check if the lists in a list are not empty

I have a list of lists in Java. Here is the code: List<List<Integer>> myList = new ArrayList<>(); myList.add(new ArrayList<Integer>()); myList.add(new ArrayList<Integer>()); myList.add(new ArrayList<Integer>()); myList.get(0).add(1); myList.get(0).add(2); myList.get(0).add(3); myList.get(1).add(4); myList.get(1).add(5); myList.get(1).add(6); myList.get(2).add(7); myList.get(2).add(8); myList.get(2).add(9); Now in a part of my code I want to check...

Intellij IDEA – System.out.println shortcut

By mkyong | March 12, 2018 | Updated : April 12, 2018 | Viewed : 12,110 | +512 pv/w In IDEA, you can type sout and press Tab to generate...

Possible number of Rectangle and Squares with the given set of elements

Given ‘N’ number of sticks of length a1, a2, a3…an. The task is to count the number of squares and rectangles possible. Note: One stick should be used only...

Does async programming mean multi-threading?

lets talk about JavaScript code which has setInterval methods every 2 sec. I also have a onblur animation event for some control. In a case where onblur occurs (+ animation),...

How to add an IntelliJ project to GitHub

Although the GitHub docs contains good info on how to add an existing GitHub project to your local machine, how to add an existing (unversioned) project from your local...

Declaring a variable and setting its value from a SELECT query in Oracle

Vote count: 28 In SQL Server we can use this: DECLARE @variable INT; SELECT @variable= mycolumn from myTable; How can I do the same in Oracle? I'm currently doing the following: DECLARE COMPID VARCHAR2(20); SELECT companyid...