Java 8 Optional Map Example
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Java 8 Optional Map Example
No value is present for this optional. If not empty, convert its value to another value. To avoid abnormal termination, we use the optional class.
Public static void main(string args[]) { function<string,<strong> optional> mapper</strong> = new function<string,<strong> optional></strong> () { // mapper function @override</p> No value is present for this optional. Map() and flatmap() apis stem from functional languages.
Public class optionalexample { public static void main (string [] args) { string [] str = new string [10];
At last, map () transforms all streams into a single stream. Java map get if contains else 0; In the above example, we use only two lines of code to replace the five that worked in the first example: And then get the names of these students and print them.
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