Simple examples of Lambda

 
Simple boolean expression: 
(List<String> dataList) -> dataList.isEmpty()
 
Object Creation:
() -> new Student(10)
 
Consume object value:
(Student s) -> {
  System.out.println(s.getName());
}

Select from  object:
(String s) -> s.length()
 
Combine multiple values :
(int a, int b) -> a * b
 
Comparison of objects:
(Student s1, Student s2) -> s1.getMarks().compareTo(s2.getMarks())