IT. Expert System.

Java Standard Edition (SE)

DisplayMode


java.awt

Class DisplayMode

    • Field Summary

      Fields 
      Modifier and Type Field and Description
      static int BIT_DEPTH_MULTI
      Value of the bit depth if multiple bit depths are supported in this display mode.
      static int REFRESH_RATE_UNKNOWN
      Value of the refresh rate if not known.
    • Constructor Summary

      Constructors 
      Constructor and Description
      DisplayMode(int width, int height, int bitDepth, int refreshRate)
      Create a new display mode object with the supplied parameters.
    • Constructor Detail

      • DisplayMode

        public DisplayMode(int width,
                           int height,
                           int bitDepth,
                           int refreshRate)
        Create a new display mode object with the supplied parameters.
        Parameters:
        width - the width of the display, in pixels
        height - the height of the display, in pixels
        bitDepth - the bit depth of the display, in bits per pixel. This can be BIT_DEPTH_MULTI if multiple bit depths are available.
        refreshRate - the refresh rate of the display, in hertz. This can be REFRESH_RATE_UNKNOWN if the information is not available.
        See Also:
        BIT_DEPTH_MULTI, REFRESH_RATE_UNKNOWN
    • Method Detail

      • getHeight

        public int getHeight()
        Returns the height of the display, in pixels.
        Returns:
        the height of the display, in pixels
      • getWidth

        public int getWidth()
        Returns the width of the display, in pixels.
        Returns:
        the width of the display, in pixels
      • getBitDepth

        public int getBitDepth()
        Returns the bit depth of the display, in bits per pixel. This may be BIT_DEPTH_MULTI if multiple bit depths are supported in this display mode.
        Returns:
        the bit depth of the display, in bits per pixel.
        See Also:
        BIT_DEPTH_MULTI
      • getRefreshRate

        public int getRefreshRate()
        Returns the refresh rate of the display, in hertz. This may be REFRESH_RATE_UNKNOWN if the information is not available.
        Returns:
        the refresh rate of the display, in hertz.
        See Also:
        REFRESH_RATE_UNKNOWN
      • equals

        public boolean equals(DisplayMode dm)
        Returns whether the two display modes are equal.
        Returns:
        whether the two display modes are equal
      • equals

        public boolean equals(Object dm)
        Indicates whether some other object is "equal to" this one.

        The equals method implements an equivalence relation on non-null object references:

        • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
        • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
        • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
        • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
        • For any non-null reference value x, x.equals(null) should return false.

        The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

        Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

        Overrides:
        equals in class Object
        Parameters:
        dm - the reference object with which to compare.
        Returns:
        true if this object is the same as the obj argument; false otherwise.
        See Also:
        Object.hashCode(), HashMap
      • hashCode

        public int hashCode()
        Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

        The general contract of hashCode is:

        • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
        • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
        • It is not required that if two objects are unequal according to the Object.equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

        As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

        Overrides:
        hashCode in class Object
        Returns:
        a hash code value for this object.
        See Also:
        Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)


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