Selection Structure and Conditions

// Using Rest Action channel.sendMessage(“Your Message”).queue( (m) -> m.delete().queueAfter(5, TimeUnit.SECONDS)); Here is what the above code is Doing: 1. We are sending a message to the channel. 2. We are deleting the message after 5 seconds.

for (int i = 0; i < collection.size(); i++) { Object object = collection.get(i); } Here is what the above code is Doing: 1. Create a new ArrayList called collection. 2. Add the numbers 1, 2, and 3 to the collection. 3. Loop through the collection and print out each number.

private void checkIndex(int index, int first, int last) { if (index > last || index < first) { throw new ArrayIndexOutOfBoundsException(); } } Here is what the above code is Doing: 1. It's checking if the index is greater than the last index or less than the first index. 2. If it is, it throws...

dependencies { compile group: ‘javax.annotation’, name: ‘javax.annotation-api’, version: ‘1.3.2’ } Here is what the above code is Doing: 1. We’re adding a new dependency to our project. 2. We’re telling Gradle to use the javax.annotation-api library. 3. We’re telling Gradle to use version 1.3.2 of the library. Now that we’ve added the dependency, we can…

getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE, WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE); Here is what the above code is Doing: 1. It’s getting the current activity. 2. It’s getting the current window. 3. It’s setting the flags to not touchable. To enable the touch again, you can use the following code:

List longList = bigIntegerList.stream().map(BigInteger::longValue).collect(Collectors.toList()); Here is what the above code is Doing: 1. We are creating a list of BigInteger objects. 2. We are converting the list of BigInteger objects to a list of Long objects using the map() method. 3. We are using the collect() method to collect the stream of Long objects into…