Your invitation has expired or is no longer valid. code example
Example 1: MatDatepicker: No provider found for DateAdapter. You must import one of the following modules at your application root: MatNativeDateModule, MatMomentDateModule, or provide a custom implementation
import {MatNativeDateModule} from '@angular/material';
Example 2: how to check if the file has remaining without reading from it java
Scanner scanner = new Scanner(new File("filename"));
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
}