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How to implement ObjLongConsumer interface using lambda expression in Java?
ObjLongConsumer<T> is a functional interface from java.util.function package. This interface accepts an object-valued and long-valued argument as input but doesn't produce any output. ObjLongConsumer<T> can be used as an assignment target for lambda expression and method reference and contains only one abstract method: accept().
Syntax
@FunctionalInterface
public interface ObjLongConsumer<T> {
void accept(T t, long value)
}Example
import java.util.function.ObjLongConsumer;
public class ObjLongConsumerTest {
public static void main(String[] args) {
ObjLongConsumer<Employee> olc = (employee, number) -> { // lambda expression
if(employee != null) {
System.out.println("Employee Name: " + employee.getEmpName());
System.out.println("Old Mobile No: " + employee.getMobileNumber());
employee.setMobileNumber(number);
System.out.println("New Mobile No: " + employee.getMobileNumber());
}
};
Employee empObject = new Employee("Adithya", 123456789L);
olc.accept(empObject, 987654321L);
}
}
// Employee class
class Employee {
private String empName;
private Long mobileNum;
public Employee(String empName, Long mobileNum){
this.empName = empName;
this.mobileNum = mobileNum;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public Long getMobileNumber() {
return mobileNum;
}
public void setMobileNumber(Long mobileNum) {
this.mobileNum = mobileNum;
}
}Output
Employee Name: Adithya Old Mobile No: 123456789 New Mobile No: 987654321
Updated on: 14-Jul-2020
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