java-stream-terminalOps.java

public class StreamTerminalOperations {
  // collect: The collect method is used to return 
  // the result of the intermediate operations performed on the stream.
  List number = Arrays.asList(2,3,4,5,3);
  Set square = number.stream().map(x->x*x).collect(Collectors.toSet());
  
  //forEach: The forEach method is used to 
  // iterate through every element of the stream.
  List number = Arrays.asList(2,3,4,5);
  number.stream().map(x->x*x).forEach(y->System.out.println(y));
  
  // reduce: The reduce method is used 
  // to reduce the elements of a stream to a single value. 
  // The reduce method takes a BinaryOperator as a parameter.
  List number = Arrays.asList(2,3,4,5);
  // Here ans variable is assigned 0 as the initial value and i is added to it .
  int even = number.stream().filter(x->x%2==0).reduce(0,(ans,i)-> ans+i);
}