How to filter empty string values from a Java List?

Nancy Den
Nancy Den
Updated on 30-Jul-2019 22:30:26

637 Views

Let’s say we have a String List with an empty value. Here, we have empty array elements before Football and after Squash:List sports = Arrays.asList("", "Football", "Cricket", "Tennis", "Squash", "", "Fencing", "Rugby");Now filter the empty string values. At first, we have used Predicate to negate values:Stream stream = sports.stream(); Predicate empty = String::isEmpty; Predicate emptyRev = empty.negate(); stream.filter(emptyRev).collect(Collectors.toList()));The following is an example to filter empty string values from a List:Exampleimport java.util.Arrays; import java.util.List; import java.util.function.Predicate; import java.util.stream.Collectors; import java.util.stream.Stream; public class Demo {    public static void main(String[] args) {       List sports = Arrays.asList("", "Football", "Cricket", "Tennis", ... Read More

C++ Program to Implement Affine Cipher

Anvi Jain
Anvi Jain
Updated on 30-Jul-2019 22:30:26

2K+ Views

In the Affine cipher, each letter in an alphabet is mapped to its numeric equivalent, is a type of monoalphabetic substitution cipher. Encryption is done using a simple mathematical function and converted back to a letter.The letters of an alphabet of size m are first mapped to the integers in the range 0 … m-1, in the Affine cipher, The ‘key’ for the Affine cipher consists of 2 numbers, a and b. a should be chosen to be relatively prime to m.EncryptionTo transform the integer, it uses modular arithmetic that each plaintext letter corresponds to into another integer that correspond ... Read More

How to set the alignment of the JLabel content along the Y axis in the bottom with Java

Anvi Jain
Anvi Jain
Updated on 30-Jul-2019 22:30:26

308 Views

Set the alignment of the label’s content along the Y axis on the bottom, use the setVerticalAlignment() method and set the location. Let us first set a label component. We have set the label background color as well so that we can check the alignment of the label’s content properly  −JLabel label = new JLabel("Project Name"); label.setPreferredSize(new Dimension(190, 100)); label.setOpaque(true); label.setBackground(Color.GREEN); label.setForeground(Color.WHITE);Now, we will align the label content along the Y axis on the bottom by seeting location as BOTTOM −label.setVerticalAlignment(JLabel.BOTTOM);The following is an example to set the alignment of the label content along the Y axis in the bottom ... Read More

Check if table exists in MySQL and display the warning if it exists?

Arjun Thakur
Arjun Thakur
Updated on 30-Jul-2019 22:30:26

264 Views

To check if table exists, use the following syntax −CREATE TABLE IF NOT EXISTS yourTableName (    yourColumnName1 dataType,    .    .    .    .    N );Here, we will try to create a table that already exists and then it will produce a warning message “Table already exists”. Let us first create a table. This table already exists −mysql> CREATE TABLE IF NOT EXISTS DemoTable    (    Id int    ); Query OK, 0 rows affected, 1 warning (0.06 sec)The warning message is as follows −mysql> show warnings;Output+-------+------+-------------------------------------+ | Level | Code | Message ... Read More

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