Package org.apache.juneau.commons.lang

Class IntegerValue

java.lang.Object
org.apache.juneau.commons.lang.Value<Integer>
org.apache.juneau.commons.lang.IntegerValue
public class IntegerValue extends Value<Integer>
A simple mutable integer value.

This class extends Value<Integer> and adds a convenience method for incrementing the value, which is useful for counting operations in lambdas and loops.

Notes:
  • This class is not thread-safe. For concurrent access, use AtomicInteger instead.
Example:

// Create a counter IntegerValue counter = IntegerValue.create(); // Use in a lambda to count valid items list.forEach(x -> { if (x.isValid()) { counter.getAndIncrement(); } }); log("Valid items: " + counter.get());

See Also:

  • Constructor Details

  • Method Details

    • create

      public static IntegerValue create()
      Creates a new integer value initialized to 0.
      Example:

      IntegerValue counter = IntegerValue.create(); assertEquals(0, counter.get());

      Returns:
      A new integer value.

    • of

      public static IntegerValue of(Integer value)
      Creates a new integer value with the specified initial value.
      Example:

      IntegerValue counter = IntegerValue.of(42); assertEquals(42, counter.get());

      Parameters:
      value - The initial value.
      Returns:
      A new integer value.

    • add

      public IntegerValue add(Integer x)
      Adds the specified value to the current value.
      Example:

      IntegerValue value = IntegerValue.of(10); value.add(5); assertEquals(15, value.get());

      Parameters:
      x - The value to add.
      Returns:
      This object.

    • addAndGet

      public Integer addAndGet(Integer x)
      Adds the specified value to the current value and returns the new value.
      Example:

      IntegerValue value = IntegerValue.of(10); int result = value.addAndGet(5); // Returns 15 assertEquals(15, value.get());

      Parameters:
      x - The value to add.
      Returns:
      The new value after addition.

    • decrement

      public IntegerValue decrement()
      Decrements the value by 1.
      Example:

      IntegerValue counter = IntegerValue.of(5); counter.decrement(); assertEquals(4, counter.get());

      Returns:
      This object.

    • decrementAndGet

      public Integer decrementAndGet()
      Decrements the value by 1 and returns the new value.
      Example:

      IntegerValue counter = IntegerValue.of(5); int result = counter.decrementAndGet(); // Returns 4 assertEquals(4, counter.get());

      Returns:
      The decremented value.

    • getAndIncrement

      public Integer getAndIncrement()
      Returns the current value and then increments it.

      This is a convenience method commonly used for counting operations in lambdas and loops.

      Example:

      IntegerValue counter = IntegerValue.of(5); int current = counter.getAndIncrement(); // Returns 5 int next = counter.get(); // Returns 6

      Returns:
      The value before it was incremented.

    • increment

      public IntegerValue increment()
      Increments the value by 1.
      Example:

      IntegerValue counter = IntegerValue.of(5); counter.increment(); assertEquals(6, counter.get());

      Returns:
      This object.

    • incrementAndGet

      public Integer incrementAndGet()
      Increments the value by 1 and returns the new value.
      Example:

      IntegerValue counter = IntegerValue.of(5); int result = counter.incrementAndGet(); // Returns 6 assertEquals(6, counter.get());

      Returns:
      The incremented value.

    • is

      public boolean is(Integer value)
      Checks if the current value is equal to the specified value.

      Uses Utils.eq(Object, Object) for deep equality comparison, which handles nulls safely.

      Example:

      IntegerValue value = IntegerValue.of(42); assertTrue(value.is(42)); assertFalse(value.is(43));

      Overrides:
      is in class Value<Integer>
      Parameters:
      value - The value to compare to.
      Returns:
      true if the current value is equal to the specified value.

    • isAny

      public boolean isAny(Integer... values)
      Checks if the current value matches any of the specified values.

      Uses Utils.eq(Object, Object) for deep equality comparison of each value.

      Example:

      IntegerValue value = IntegerValue.of(5); assertTrue(value.isAny(3, 5, 7)); assertFalse(value.isAny(1, 2));

      Parameters:
      values - The values to compare to.
      Returns:
      true if the current value matches any of the specified values.