Click here to watch in Youtube :
https://www.youtube.com/watch?v=EV5DK7WIHZw&list=UUhwKlOVR041tngjerWxVccw
Employee.java
public class Employee
{
private String name;
private int age;
public Employee()
{
}
public Employee(String name, int age)
{
super();
this.name = name;
this.age = age;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
@Override
public String toString()
{
return "Employee [name=" + name + ", age=" + age + "]";
}
}
SoftwareEngineer.java
public class SoftwareEngineer
{
private String name;
private int age;
public SoftwareEngineer(String name, int age)
{
super();
this.name = name;
this.age = age;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
}
NonStreamDemo.java
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
*
* List of objects -> List of other objects
*
* This example shows you how to convert a list of SoftwareEngineer
* objects into a list of Employee objects.
*/
public class NonStreamDemo
{
public static void main(String[] args)
{
List<SoftwareEngineer> softwareEngineerList = Arrays.asList(
new SoftwareEngineer("Ram", 30),
new SoftwareEngineer("Peter", 27),
new SoftwareEngineer("Dave", 33));
// Before java 8
List<Employee> employeeList = convertToEmployee(softwareEngineerList);
System.out.println(employeeList);
}
private static List<Employee> convertToEmployee(List<SoftwareEngineer> softwareEngineerList)
{
List<Employee> employeeList = new ArrayList<>();
for (SoftwareEngineer softwareEngineer : softwareEngineerList)
{
Employee employee = new Employee();
employee.setName(softwareEngineer.getName());
employee.setAge(softwareEngineer.getAge());
employeeList.add(employee);
}
return employeeList;
}
}
Output
[Employee [name=Ram, age=30], Employee [name=Peter, age=27], Employee [name=Dave, age=33]]
StreamDemo.java
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
/**
*
* List of objects -> List of other objects
*
* This example shows you how to convert a list of SoftwareEngineer
* objects into a list of Employee objects.
*/
public class StreamDemo
{
public static void main(String[] args)
{
List<SoftwareEngineer> softwareEngineerList = Arrays.asList(
new SoftwareEngineer("Ram", 30),
new SoftwareEngineer("Peter", 27),
new SoftwareEngineer("Dave", 33));
// Java 8
List<Employee> employeeList = softwareEngineerList.stream()
.map(softwareEngineer -> {
Employee employee = new Employee();
employee.setName(softwareEngineer.getName());
employee.setAge(softwareEngineer.getAge());
return employee;
}).collect(Collectors.toList());
System.out.println(employeeList);
}
}
Output
[Employee [name=Ram, age=30], Employee [name=Peter, age=27], Employee [name=Dave, age=33]]
Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_swl_to_empl_App.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_swl_to_empl_App
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/53e39342c1c41555c6e548783b3cf96ab7bd9ee6/BasicJava/StreamDemo_swl_to_empl_App/?at=master
See also:
All JavaEE Viedos Playlist
All JavaEE Viedos
All JAVA EE Links
Servlets Tutorial
All Design Patterns Links
JDBC Tutorial
Java Collection Framework Tutorial
JAVA Tutorial
Kids Tutorial
