Java 8 Stream findFirst(), findAny() example.
Stream.findFirst() returns the first element of this stream, or no element if the stream is empty.
Stream.findAny() returns anyone element of the stream, or an no element if the stream is empty.
package com.java2novice.streams;
import java.util.ArrayList;
import java.util.List;
import com.java2novice.lambda.Employee;
public class StreamFindEx {
public static void main(String a[]) {
List<Employee> empList = new ArrayList<>();
empList.add(new Employee("Nataraja G", "Accounts", 8000));
empList.add(new Employee("Nagesh Y", "Admin", 15000));
empList.add(new Employee("Vasu V", "Security", 2500));
empList.add(new Employee("Amar", "Admin", 12500));
empList.stream().filter(emp->emp.getAccount().matches("Admin"))
.findFirst()
.ifPresent(System.out::println);
empList.stream().filter(emp->emp.getAccount().matches("Admin"))
.findAny()
.ifPresent(System.out::println);
}
}
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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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