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Method Reference - Reference to a Constructor example.
This page shows a simple example of Method Reference feature of reference to a construtor:
package com.java2novice.methodreference;
import com.java2novice.lambda.Employee;
public class ConstructorRefEx {
public static void main(String a[]) {
EmployeeFactory empFactory = Employee::new;
Employee emp = empFactory.getEmployee("Nataraja G", "Accounts", 8000);
System.out.println(emp);
}
}
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Here is EmployeeFactory class:
package com.java2novice.methodreference;
import com.java2novice.lambda.Employee;
public interface EmployeeFactory {
public abstract Employee getEmployee(String name, String account, Integer salary);
}
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Here is Employee POJO class:
package com.java2novice.lambda;
public class Employee {
private String name;
private String account;
private Integer salary;
public Employee(String name, String account, Integer salary) {
super();
this.name = name;
this.account = account;
this.salary = salary;
}
@Override
public String toString() {
return "name: "+ this.name +" | account: "+ this.account +" | salary: "+this.salary;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public Integer getSalary() {
return salary;
}
public void setSalary(Integer salary) {
this.salary = salary;
}
}
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| Output: |
name: Nataraja G | account: Accounts | salary: 8000
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Java-8 Method References Examples
- Method Reference - Reference to a Static Method example.
- Method Reference - Reference to a Instance Method example.
- Method Reference - Reference to a Constructor example.
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Java class can be private?
We can not declare top level class as private. Java allows
only public and default modifier for top level classes in java.
Inner classes can be private.
The greatest obstacle to discovery is not ignorance; it is the illusion of knowledge.
-- Daniel J. Boorstin
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