Package io.microsphere.lang

Class MutableInteger

  • All Implemented Interfaces:
    java.io.Serializable
    public class MutableInteger
extends java.lang.Number
    A mutable integer container that provides various atomic operations for integer addition, increment, decrement, and value retrieval. This class extends Number, allowing it to be used in contexts where a numeric representation is required.

    Example Usage

    
 MutableInteger i = MutableInteger.of(5);

 // Get and set a new value
 int oldValue = i.getAndSet(10); // Returns 5, value becomes 10

 // Increment and get the new value
 int newValue = i.incrementAndGet(); // Returns 11, value becomes 11

 // Add a delta and get the updated value
 int result = i.addAndGet(5); // Returns 16, value becomes 16

 // Get current value
 int currentValue = i.get(); // Returns 16
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      MutableInteger​(int value)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int addAndGet​(int delta)
      Adds the given delta to the current value and returns the updated value.
      int decrementAndGet()
      Decrements the current value by 1 and returns the updated value.
      double doubleValue()
      Returns the current value as a double.
      boolean equals​(java.lang.Object obj)  
      float floatValue()
      Returns the current value as a float.
      int get()
      Gets the current value stored in this MutableInteger.
      int getAndAdd​(int delta)
      Adds the given delta to the current value and returns the previous value before the addition.
      int getAndDecrement()
      Decrements the current value by 1 and returns the previous value before the decrement.
      int getAndIncrement()
      increments the current value by 1 and returns the previous value before the increment.
      int getAndSet​(int newValue)
      Sets the value to the given newValue and returns the previous value.
      int hashCode()  
      int incrementAndGet()
      Increments the current value by 1 and returns the updated value.
      int intValue()
      Returns the integer value stored in this MutableInteger.
      long longValue()  
      static MutableInteger of​(int value)
      Creates a new instance of MutableInteger initialized with the given value.
      MutableInteger set​(int newValue)
      Sets the value to the given newValue and returns this instance.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Number

        byteValue, shortValue

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • MutableInteger

        public MutableInteger​(int value)

    • Method Detail

      • get

        public final int get()
        Gets the current value stored in this MutableInteger.
        Returns:
        the current integer value

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int currentValue = i.get(); // retrieves the current value
 System.out.println(currentValue); // prints 5

      • set

        public final MutableInteger set​(int newValue)
        Sets the value to the given newValue and returns this instance.
        Parameters:
        newValue - the new value to set
        Returns:
        this instance of MutableInteger

        Example Usage

        
 MutableInteger i = new MutableInteger(0);
 i.set(10); // sets the value to 10
 System.out.println(i.get()); // prints 10

      • getAndSet

        public final int getAndSet​(int newValue)
        Sets the value to the given newValue and returns the previous value.
        Parameters:
        newValue - the new value to set
        Returns:
        the previous value before the update

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int oldValue = i.getAndSet(10); // sets the value to 10, returns 5
 System.out.println(oldValue); // prints 5
 System.out.println(i.get()); // prints 10

      • getAndIncrement

        public final int getAndIncrement()
        increments the current value by 1 and returns the previous value before the increment.

        This method behaves similarly to a combination of the get() and incrementAndGet() methods, where the current value is returned before it is increased by 1.

        Returns:
        the value before incrementing

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int oldValue = i.getAndIncrement(); // increments the value to 6, returns 5
 System.out.println(oldValue); // prints 5
 System.out.println(i.get()); // prints 6

      • getAndDecrement

        public final int getAndDecrement()
        Decrements the current value by 1 and returns the previous value before the decrement.

        This method behaves similarly to a combination of the get() and decrementAndGet() methods, where the current value is returned before it is decreased by 1.

        Returns:
        the value before decrementing

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int oldValue = i.getAndDecrement(); // decrements the value to 4, returns 5
 System.out.println(oldValue); // prints 5
 System.out.println(i.get()); // prints 4

      • getAndAdd

        public final int getAndAdd​(int delta)
        Adds the given delta to the current value and returns the previous value before the addition.

        This method ensures that the current value is returned before the addition operation is performed, similar to a combination of the get() and addAndGet(int) methods.

        Parameters:
        delta - the value to add to the current value
        Returns:
        the previous value before the addition

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int oldValue = i.getAndAdd(3); // adds 3 to the current value (5), returns 5
 System.out.println(oldValue); // prints 5
 System.out.println(i.get()); // prints 8

      • incrementAndGet

        public final int incrementAndGet()
        Increments the current value by 1 and returns the updated value.

        This method behaves similarly to the ++value operation, where the value is increased by 1 before it is returned.

        Returns:
        the updated value after incrementing

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int newValue = i.incrementAndGet(); // increments the value to 6, returns 6
 System.out.println(newValue); // prints 6
 System.out.println(i.get()); // prints 6

      • decrementAndGet

        public final int decrementAndGet()
        Decrements the current value by 1 and returns the updated value.

        This method behaves similarly to the --value operation, where the value is decreased by 1 before it is returned.

        Returns:
        the updated value after decrementing

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int newValue = i.decrementAndGet(); // decrements the value to 4, returns 4
 System.out.println(newValue); // prints 4
 System.out.println(i.get()); // prints 4

      • addAndGet

        public int addAndGet​(int delta)
        Adds the given delta to the current value and returns the updated value.

        This method ensures that the new value is calculated and stored before it is returned, behaving similarly to the compound addition operation followed by a retrieval.

        Parameters:
        delta - the value to add to the current value
        Returns:
        the updated value after adding the delta

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 int newValue = i.addAndGet(3); // adds 3 to the current value (5), returns 8
 System.out.println(newValue); // prints 8
 System.out.println(i.get()); // prints 8

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • intValue

        public int intValue()
        Returns the integer value stored in this MutableInteger.

        This method provides the implementation for the Number class's abstract method, allowing this class to be used where a Number is expected.

        Specified by:
        intValue in class java.lang.Number
        Returns:
        the current integer value

        Example Usage

        
 MutableInteger i = new MutableInteger(7);
 int value = i.intValue(); // retrieves the current integer value
 System.out.println(value); // prints 7

      • longValue

        public long longValue()
        Specified by:
        longValue in class java.lang.Number

      • floatValue

        public float floatValue()
        Returns the current value as a float.

        This method provides the implementation for the Number class's abstract method, allowing this class to be used where a Number is expected.

        Specified by:
        floatValue in class java.lang.Number
        Returns:
        the current value as a float

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 float value = i.floatValue(); // retrieves the current value as a float
 System.out.println(value); // prints 5.0

      • doubleValue

        public double doubleValue()
        Returns the current value as a double.

        This method provides the implementation for the Number class's abstract method, allowing this class to be used where a Number is expected.

        Specified by:
        doubleValue in class java.lang.Number
        Returns:
        the current value as a double

        Example Usage

        
 MutableInteger i = new MutableInteger(5);
 double value = i.doubleValue(); // retrieves the current value as a double
 System.out.println(value); // prints 5.0

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • equals

        public boolean equals​(java.lang.Object obj)
        Overrides:
        equals in class java.lang.Object

      • of

        public static MutableInteger of​(int value)
        Creates a new instance of MutableInteger initialized with the given value.

        This static factory method provides a convenient way to create an instance of MutableInteger with the specified initial value.

        Parameters:
        value - the initial value for the MutableInteger
        Returns:
        a new instance of MutableInteger initialized with the given value

        Example Usage

        
 MutableInteger i = MutableInteger.of(10); // creates an MutableInteger with initial value 10
 System.out.println(i.get()); // prints 10