Examples of java.time.YearMonth

java.time.YearMonth

A year-month in the ISO-8601 calendar system, such as {@code 2007-12}.

{@code YearMonth} is an immutable date-time object that represents the combinationof a year and month. Any field that can be derived from a year and month, such as quarter-of-year, can be obtained.

This class does not store or represent a day, time or time-zone. For example, the value "October 2007" can be stored in a {@code YearMonth}.

The ISO-8601 calendar system is the modern civil calendar system used today in most of the world. It is equivalent to the proleptic Gregorian calendar system, in which today's rules for leap years are applied for all time. For most applications written today, the ISO-8601 rules are entirely suitable. However, any application that makes use of historical dates, and requires them to be accurate will find the ISO-8601 approach unsuitable.

This is a value-based class; use of identity-sensitive operations (including reference equality ( {@code ==}), identity hash code, or synchronization) on instances of {@code YearMonth} may have unpredictable results and should be avoided.The {@code equals} method should be used for comparisons. @implSpec This class is immutable and thread-safe. @since 1.8

    constraint = new PastValidatorForYearMonth();
  }


  @Test
  public void testIsValid() {
    YearMonth future = YearMonth.now().plusYears( 1 );
    YearMonth past = YearMonth.now().minusYears( 1 );


    assertTrue( constraint.isValid( null, null ), "null fails validation." );
    assertTrue( constraint.isValid( past, null ), "Past YearMonth '" + past + "' fails validation.");
    assertFalse( constraint.isValid( future, null ), "Future YearMonth '" + future + "' validated as past.");
  }

  /**
   * {@link java.time.YearMonth} is a holder for an associated year and month, such as that used for expiry dates.
   */
  @Test
  public void testYearMonthHolder() {
    final YearMonth expiry = YearMonth.of(2014, Month.SEPTEMBER);
    final LocalDate localDate = LocalDate.of(expiry.getYear(), expiry.getMonthValue(), 1);


    assertThat(localDate.getMonth(), is(expiry.getMonth()));
  }

Examples of java.time.YearMonth

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