Notes

import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.Month;
import java.time.Period;
import java.time.format.DateTimeFormatter;

public class Fechas {

public static void main (String ... a){
LocalDate d1 = LocalDate.of(2019, Month.MARCH, 1);
LocalDate d2 = LocalDate.of(2019, 10, 1);

LocalTime t1 = LocalTime.of(22, 40);
LocalTime t2 = LocalTime.of(22, 40, 33);
LocalTime t3 = LocalTime.of(22, 40, 33, 56);

LocalDateTime dt1 = LocalDateTime.of(2019, Month.MARCH, 2, 22, 30);
LocalDateTime dt2 = LocalDateTime.of(2019, 10, 2, 22, 30, 40);

System.out.println(d1);

d1.plusDays(1); // d1 no se modifica
d2.plusMonths(2);

t1.plusMinutes(3);

dt1.plusWeeks(3);

System.out.println(d1);
System.out.println(d1.plusDays(1));

Period p = Period.of(1,2,18);
System.out.println(p); // P1Y2M18D
System.out.println(d1.plus(p)); // 2020-05-19

Duration d = Duration.ofMinutes(10); // PT10M
Duration d3 = Duration.ofDays(1).ofMinutes(10); // PT10M
Duration d4 = Duration.ofDays(1).plusMinutes(10); // PT24H10M
d = d.plusSeconds(30);
d = d.plusDays(1);
System.out.println(d); // PT24H10M30S

Duration dd = Duration.between(t1,t2);
System.out.println(dd); // PT33S
System.out.println(Duration.between(t2,t1)); // PT-33S

LocalDate d5 = LocalDate.parse("2019-05-12", DateTimeFormatter.ISO_DATE);


}
}





import java.time.DateTimeException;
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.temporal.TemporalAdjusters;
import java.util.Scanner;

public class birthday {

public static void main(String ... args){

Scanner in = new Scanner(System.in);
LocalDate cumple = null;
do{
System.out.println("Fecha del día de tu nacimiento (d/M/yyyy)");
String input = in.nextLine();
try{
cumple=cumple.parse(input,DateTimeFormatter.ofPattern("d/M/yyyy"));
}catch(DateTimeParseException e){
System.out.println("Formato no válido: "+e);
}catch(DateTimeException e2){
System.out.println("Fecha no válida: "+e2);
}
}while(cumple==null);

System.out.println("Día de la semana:" + cumple.getDayOfWeek());

LocalDate fiesta = cumple.with(TemporalAdjusters.nextOrSame(DayOfWeek.SATURDAY));
System.out.println("Fecha fiesta: "+ fiesta);

System.out.println("Hora fiesta: " + LocalDateTime.of(fiesta,LocalTime.of(21,30)));

System.out.println("Aviso fiesta: " + fiesta.minusDays(10));
}

}




import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

public class ListTest {

public static void main (String ... args){

List <String> names = new ArrayList<>();

names.add("sergi");
names.add("pepe");
names.add("juan");
names.add("sergi");

names.remove("sergi");
names.remove(1);

System.out.println(names); // [pepe,sergi]

List<Integer> numbers = new ArrayList<>();

numbers.add(1);
numbers.add(2);
numbers.add(3);

numbers.remove(1); // posición 1
numbers.remove(new Integer(3));

System.out.println(numbers); // [1]

numbers = new ArrayList<>(Arrays.asList(1,2,3,4,5));
System.out.println(numbers); // [1, 2, 3, 4, 5]

numbers.set(0,5);
numbers.clear();
if(numbers.isEmpty() || numbers.contains(4)){

}

Integer [] numbersArray = numbers.toArray(new Integer[0]);
}

}


/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.mycompany.mavenproject1;

import java.math.BigDecimal;

/**
*
* @author javaed
*/
public class Importe implements Comparable<Importe>{

private BigDecimal cantidad;
private String divisa;

@Override
public int compareTo(Importe t){
return cantidad.compareTo(t.cantidad);
}


}