03-data-search.asc

Search for data

Objective

Search for data by using methods, such as findFirst(), findAny(), anyMatch(), allMatch(), and noneMatch()

1. You can retrieve the first or any element from the collection.

   src/org/j6toj8/collections/datasearch/DataSearch_FindFirstAny.java

   link:../../../src/org/j6toj8/collections/datasearch/DataSearch_FindFirstAny.java[role=include]

   console output

   First: 1
   Any: 9

2. You can check whether or not collection elements meet any criteria.

   src/org/j6toj8/collections/datasearch/DataSearch_Match.java

   link:../../../src/org/j6toj8/collections/datasearch/DataSearch_Match.java[role=include]

   console output

   anyMatch: true
   allMatch: false
   noneMatch: false

References

• Using Streams

  Boyarsky, Jeanne; Selikoff, Scott. OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide (p. 185). Wiley. Kindle Edition.

• The Java 8 Stream API Tutorial.