Module java.base
Package java.lang.reflect

Class Modifier

  • public class Modifier
extends Object
    The Modifier class provides static methods and constants to decode class and member access modifiers. The sets of modifiers are represented as integers with distinct bit positions representing different modifiers. The values for the constants representing the modifiers are taken from the tables in sections 4.1, 4.4, 4.5, and 4.7 of The Java™ Virtual Machine Specification.
    Since:
    1.1
    See Also:
    Class.getModifiers(), Member.getModifiers()

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static int ABSTRACT
      The int value representing the abstract modifier.
      static int FINAL
      The int value representing the final modifier.
      static int INTERFACE
      The int value representing the interface modifier.
      static int NATIVE
      The int value representing the native modifier.
      static int PRIVATE
      The int value representing the private modifier.
      static int PROTECTED
      The int value representing the protected modifier.
      static int PUBLIC
      The int value representing the public modifier.
      static int STATIC
      The int value representing the static modifier.
      static int STRICT
      The int value representing the strictfp modifier.
      static int SYNCHRONIZED
      The int value representing the synchronized modifier.
      static int TRANSIENT
      The int value representing the transient modifier.
      static int VOLATILE
      The int value representing the volatile modifier.

    • Constructor Summary

      Constructors 
      Constructor Description
      Modifier()  

    • Method Summary

      Modifier and Type Method Description
      static int classModifiers()
      Return an int value OR-ing together the source language modifiers that can be applied to a class.
      static int constructorModifiers()
      Return an int value OR-ing together the source language modifiers that can be applied to a constructor.
      static int fieldModifiers()
      Return an int value OR-ing together the source language modifiers that can be applied to a field.
      static int interfaceModifiers()
      Return an int value OR-ing together the source language modifiers that can be applied to an interface.
      static boolean isAbstract​(int mod)
      Return true if the integer argument includes the abstract modifier, false otherwise.
      static boolean isFinal​(int mod)
      Return true if the integer argument includes the final modifier, false otherwise.
      static boolean isInterface​(int mod)
      Return true if the integer argument includes the interface modifier, false otherwise.
      static boolean isNative​(int mod)
      Return true if the integer argument includes the native modifier, false otherwise.
      static boolean isPrivate​(int mod)
      Return true if the integer argument includes the private modifier, false otherwise.
      static boolean isProtected​(int mod)
      Return true if the integer argument includes the protected modifier, false otherwise.
      static boolean isPublic​(int mod)
      Return true if the integer argument includes the public modifier, false otherwise.
      static boolean isStatic​(int mod)
      Return true if the integer argument includes the static modifier, false otherwise.
      static boolean isStrict​(int mod)
      Return true if the integer argument includes the strictfp modifier, false otherwise.
      static boolean isSynchronized​(int mod)
      Return true if the integer argument includes the synchronized modifier, false otherwise.
      static boolean isTransient​(int mod)
      Return true if the integer argument includes the transient modifier, false otherwise.
      static boolean isVolatile​(int mod)
      Return true if the integer argument includes the volatile modifier, false otherwise.
      static int methodModifiers()
      Return an int value OR-ing together the source language modifiers that can be applied to a method.
      static int parameterModifiers()
      Return an int value OR-ing together the source language modifiers that can be applied to a parameter.
      static String toString​(int mod)
      Return a string describing the access modifier flags in the specified modifier.

    • Field Detail

      • PUBLIC

        public static final int PUBLIC
        The int value representing the public modifier.
        See Also:
        Constant Field Values

      • PRIVATE

        public static final int PRIVATE
        The int value representing the private modifier.
        See Also:
        Constant Field Values

      • PROTECTED

        public static final int PROTECTED
        The int value representing the protected modifier.
        See Also:
        Constant Field Values

      • STATIC

        public static final int STATIC
        The int value representing the static modifier.
        See Also:
        Constant Field Values

      • FINAL

        public static final int FINAL
        The int value representing the final modifier.
        See Also:
        Constant Field Values

      • SYNCHRONIZED

        public static final int SYNCHRONIZED
        The int value representing the synchronized modifier.
        See Also:
        Constant Field Values

      • VOLATILE

        public static final int VOLATILE
        The int value representing the volatile modifier.
        See Also:
        Constant Field Values

      • TRANSIENT

        public static final int TRANSIENT
        The int value representing the transient modifier.
        See Also:
        Constant Field Values

      • NATIVE

        public static final int NATIVE
        The int value representing the native modifier.
        See Also:
        Constant Field Values

      • INTERFACE

        public static final int INTERFACE
        The int value representing the interface modifier.
        See Also:
        Constant Field Values

      • ABSTRACT

        public static final int ABSTRACT
        The int value representing the abstract modifier.
        See Also:
        Constant Field Values

      • STRICT

        public static final int STRICT
        The int value representing the strictfp modifier.
        See Also:
        Constant Field Values

    • Constructor Detail

      • Modifier

        public Modifier()

    • Method Detail

      • isPublic

        public static boolean isPublic​(int mod)
        Return true if the integer argument includes the public modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the public modifier; false otherwise.

      • isPrivate

        public static boolean isPrivate​(int mod)
        Return true if the integer argument includes the private modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the private modifier; false otherwise.

      • isProtected

        public static boolean isProtected​(int mod)
        Return true if the integer argument includes the protected modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the protected modifier; false otherwise.

      • isStatic

        public static boolean isStatic​(int mod)
        Return true if the integer argument includes the static modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the static modifier; false otherwise.

      • isFinal

        public static boolean isFinal​(int mod)
        Return true if the integer argument includes the final modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the final modifier; false otherwise.

      • isSynchronized

        public static boolean isSynchronized​(int mod)
        Return true if the integer argument includes the synchronized modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the synchronized modifier; false otherwise.

      • isVolatile

        public static boolean isVolatile​(int mod)
        Return true if the integer argument includes the volatile modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the volatile modifier; false otherwise.

      • isTransient

        public static boolean isTransient​(int mod)
        Return true if the integer argument includes the transient modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the transient modifier; false otherwise.

      • isNative

        public static boolean isNative​(int mod)
        Return true if the integer argument includes the native modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the native modifier; false otherwise.

      • isInterface

        public static boolean isInterface​(int mod)
        Return true if the integer argument includes the interface modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the interface modifier; false otherwise.

      • isAbstract

        public static boolean isAbstract​(int mod)
        Return true if the integer argument includes the abstract modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the abstract modifier; false otherwise.

      • isStrict

        public static boolean isStrict​(int mod)
        Return true if the integer argument includes the strictfp modifier, false otherwise.
        Parameters:
        mod - a set of modifiers
        Returns:
        true if mod includes the strictfp modifier; false otherwise.

      • toString

        public static String toString​(int mod)
        Return a string describing the access modifier flags in the specified modifier. For example: 
            public final synchronized strictfp
        The modifier names are returned in an order consistent with the suggested modifier orderings given in sections 8.1.1, 8.3.1, 8.4.3, 8.8.3, and 9.1.1 of The Java™ Language Specification. The full modifier ordering used by this method is:
        public protected private abstract static final transient volatile synchronized native strictfp interface
        The interface modifier discussed in this class is not a true modifier in the Java language and it appears after all other modifiers listed by this method. This method may return a string of modifiers that are not valid modifiers of a Java entity; in other words, no checking is done on the possible validity of the combination of modifiers represented by the input. Note that to perform such checking for a known kind of entity, such as a constructor or method, first AND the argument of toString with the appropriate mask from a method like constructorModifiers() or methodModifiers().
        Parameters:
        mod - a set of modifiers
        Returns:
        a string representation of the set of modifiers represented by mod

      • classModifiers

        public static int classModifiers()
        Return an int value OR-ing together the source language modifiers that can be applied to a class.
        Returns:
        an int value OR-ing together the source language modifiers that can be applied to a class.
        Since:
        1.7
        See The Java™ Language Specification:
        8.1.1 Class Modifiers

      • interfaceModifiers

        public static int interfaceModifiers()
        Return an int value OR-ing together the source language modifiers that can be applied to an interface.
        Returns:
        an int value OR-ing together the source language modifiers that can be applied to an interface.
        Since:
        1.7
        See The Java™ Language Specification:
        9.1.1 Interface Modifiers

      • constructorModifiers

        public static int constructorModifiers()
        Return an int value OR-ing together the source language modifiers that can be applied to a constructor.
        Returns:
        an int value OR-ing together the source language modifiers that can be applied to a constructor.
        Since:
        1.7
        See The Java™ Language Specification:
        8.8.3 Constructor Modifiers

      • methodModifiers

        public static int methodModifiers()
        Return an int value OR-ing together the source language modifiers that can be applied to a method.
        Returns:
        an int value OR-ing together the source language modifiers that can be applied to a method.
        Since:
        1.7
        See The Java™ Language Specification:
        8.4.3 Method Modifiers

      • fieldModifiers

        public static int fieldModifiers()
        Return an int value OR-ing together the source language modifiers that can be applied to a field.
        Returns:
        an int value OR-ing together the source language modifiers that can be applied to a field.
        Since:
        1.7
        See The Java™ Language Specification:
        8.3.1 Field Modifiers

      • parameterModifiers

        public static int parameterModifiers()
        Return an int value OR-ing together the source language modifiers that can be applied to a parameter.
        Returns:
        an int value OR-ing together the source language modifiers that can be applied to a parameter.
        Since:
        1.8
        See The Java™ Language Specification:
        8.4.1 Formal Parameters