Modifier.java

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package javax.lang.model.element;

/**
 * Represents a modifier on a program element such
 * as a class, method, or field.
 *
 * <p>Not all modifiers are applicable to all kinds of elements.
 * When two or more modifiers appear in the source code of an element
 * then it is customary, though not required, that they appear in the same
 * order as the constants listed in the detail section below.
 *
 * <p>Note that it is possible additional modifiers will be added in
 * future versions of the platform.
 *
 * @author Joseph D. Darcy
 * @author Scott Seligman
 * @author Peter von der Ah&eacute;
 * @since 1.6
 */
// 元素修饰符
public enum Modifier {
    
    // See JLS sections 8.1.1, 8.3.1, 8.4.3, 8.8.3, and 9.1.1.
    // java.lang.reflect.Modifier includes INTERFACE, but that's a VMism.
    
    /** The modifier {@code public} */
    PUBLIC,     // public
    /** The modifier {@code protected} */
    PROTECTED,  // protected
    /** The modifier {@code private} */
    PRIVATE,    // private
    
    /** The modifier {@code abstract} */
    ABSTRACT,   // abstract
    
    /** The modifier {@code default} @since 1.8 */
    DEFAULT,    // default
    
    /** The modifier {@code static} */
    STATIC,     // static
    
    /** The modifier {@code final} */
    FINAL,      // final
    
    /** The modifier {@code transient} */
    TRANSIENT,  // transient
    
    /** The modifier {@code volatile} */
    VOLATILE,   // volatile
    
    /** The modifier {@code synchronized} */
    SYNCHRONIZED,   // synchronized
    
    /** The modifier {@code native} */
    NATIVE,     // native
    
    /** The modifier {@code strictfp} */
    STRICTFP;   // strictfp
    
    /**
     * Returns this modifier's name in lowercase.
     */
    public String toString() {
        return name().toLowerCase(java.util.Locale.US);
    }
}