LocalDate sample Snippet

Author: Arun-Janani

java8/src/com/domain/Employee.java

@@ -1,7 +1,9 @@
 package com.domain;
 
+import java.util.Date;
 import java.util.StringJoiner;
 
+
 public class Employee implements Comparable<Employee>{
 //public class Employee {
 
@@ -19,6 +21,8 @@ public class Employee implements Comparable<Employee>{
 	private String sex;
 
 	private Integer age;
+
+	private Date date_of_birth;
 
 	public String getId() {
 		return id;
@@ -75,7 +79,15 @@ public void setAge(Integer age) {
 		this.age = age;
 	}
 
-	@Override
+    public Date getDate_of_birth() {
+        return date_of_birth;
+    }
+
+    public void setDate_of_birth(Date date_of_birth) {
+        this.date_of_birth = date_of_birth;
+    }
+
+    @Override
 	public String toString() {
 		StringJoiner sj = new StringJoiner(",","{","}");
 		sj.add("id: ").add(this.id).add("firstName : ").add(this.first_Name).

java8/src/com/domain/EmployeeFactory.java

@@ -39,7 +39,7 @@ public static List<Employee> getEmployeeList() {
 		e3.setPhone_Number("+91 9600328267");
 		e3.setEmp_type(EmployeeType.Temporary.toString());
 		e3.setSex(SexType.Male.toString());
-		e3.setAge(30);
+		e3.setAge(28);
 
 		employeeList.add(e3);
 

java8/src/com/lambdas/SampleDateAPI.java

@@ -0,0 +1,44 @@
+package com.lambdas;
+
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.Period;
+import java.time.temporal.TemporalAccessor;
+import java.util.Date;
+
+public class SampleDateAPI {
+
+    public static void main(String[] args) {
+
+        Instant i = Instant.now();
+
+        System.out.println("Time now from Instant API "+i);
+        //Time now 2019-06-29T09:52:03.688Z
+
+        LocalDate localDate = LocalDate.now();
+        System.out.println("Time now from LocalDate API " +localDate);
+        //2019-06-29
+
+        LocalDateTime localDateTime = LocalDateTime.now();
+        System.out.println("Time now from localDateTime API " +localDateTime);
+        //2019-06-29T15:33:40.774
+
+
+        /** Age Calculator
+         *
+         */
+        getAge();
+
+    }
+
+    public static void getAge() {
+        LocalDate localDate = LocalDate.of(1990, 7, 19);
+        //System.out.println(localDate.;
+        Period period = Period.between(LocalDate.now(), localDate);
+        System.out.println("how old are you ?" + period.getYears());
+    }
+
+    
+
+}

java8/src/com/lambdas/SampleLambdas.java

@@ -146,6 +146,20 @@ public static void main(String[] args) {
 		/**
 		 * {28=[Arunprasad], 45=[Janani], 29=[Prasad], 30=[Kumar]}
 		 */
+
+		//getting Employee Names based on age greater then 25
+		Map<Integer,String> e3 =
+				employees.stream().filter(EmployeePredicate.getAgePrediate(25)).
+						collect(
+								Collectors.groupingBy(
+										Employee::getAge,
+										Collectors.mapping(
+											Employee::getFirst_Name,
+												Collectors.joining(",","(",")")
+												)
+								)
+						);
+		System.out.println(e3);
 		System.out.println("---------Group by End-----------");
 
 	}