*/ private void verifyNameProperty(String aName) { boolean nameHasContent = (aName != null) && (!aName.equals("")); if (!nameHasContent) { throw new IllegalArgumentException( "Names must be non-null and non-empty."); } StringCharacterIterator iterator = new StringCharacterIterator(aName)...
In Java 8, the easiest method for creating an unmodifiable Map is using theCollections.unmodifiableMap()method.This is super useful because it allows us to create an unmodifiable map from a modifiable one. Map<Integer,String>map=newHashMap<>();map.put("key 1","value 1");map.put("key ...
A linked list is a data structure that consists of a sequence of nodes, where each node stores an element and a reference to the next node. In Java, the
High performance scalable web applications often use a distributed in-memory data cache in front of or in place of robust persistent storage for some tasks. In Java Applications it is very common to use in Memory Cache for better performance. But what is “Cache?” A cache is an area of ...
Back to Stream ↑Question We would like to know how to get Iterator after filter. Answerimport java.util.Arrays; import java.util.Iterator; import java.util.List; //www.java2s.com public class Main { public static void main(String[] args) { List<Integer>...
Important Methods Used by the Java Iterator: 1) boolean hasNext(): this method returns true when there is another element to be traversed in the collection. 2) Object next(): It provides the next object to be traversed. This method throws an exception if there are no more elements to be...
Java ArrayList.listIterator() returns a bi-directional list iterator that iterates over the elements of the current list.
In Java 8, we can useStreamSupport.streamto convert anIteratorinto aStream. // Iterator -> Spliterators -> StreamStream<String> stream = StreamSupport.stream( Spliterators.spliteratorUnknownSize( iterator, Spliterator.ORDERED) ,false);Copy ...
Now we can use Guava’sSplitterclass to truncate ourString: staticStringusingSplitter(String text,intlength){ Iterable<String> parts = Splitter.fixedLength(length) .split(text);returnparts.iterator() .next(); }Copy We usedSplitter.fixedLength()to split ourStringinto multiple pieces of the given...
How to Clone an Array in Java Ch 4. Analyzing Algorithms Ch 5. Recursion & Recursive Algorithms Ch 6. Stacks, Queues & Lists in Java Ch 7. List & Iterator Abstract Data... Ch 8. Trees in Data Structure Ch 9. Priority Queues in Java Ch 10. Maps & Hash Tables in Data... Ch ...