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Java 编译器代码定义的 Java语言的类型 Types

敬亭阁主 2022-06-09 阅读 95

Java 编译器代码定义的 Java语言的类型 Types

/*
* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

*/

package javax.lang.model.type;


/**
* The kind of a type mirror.
*
* <p>Note that it is possible additional type kinds will be added to
* accommodate new, currently unknown, language structures added to
* future versions of the Java&trade; programming language.
*
* @author Joseph D. Darcy
* @author Scott Seligman
* @author Peter von der Ah&eacute;
* @see TypeMirror
* @since 1.6
*/
public enum TypeKind {
/**
* The primitive type {@code boolean}.
*/
BOOLEAN,

/**
* The primitive type {@code byte}.
*/
BYTE,

/**
* The primitive type {@code short}.
*/
SHORT,

/**
* The primitive type {@code int}.
*/
INT,

/**
* The primitive type {@code long}.
*/
LONG,

/**
* The primitive type {@code char}.
*/
CHAR,

/**
* The primitive type {@code float}.
*/
FLOAT,

/**
* The primitive type {@code double}.
*/
DOUBLE,

/**
* The pseudo-type corresponding to the keyword {@code void}.
* @see NoType
*/
VOID,

/**
* A pseudo-type used where no actual type is appropriate.
* @see NoType
*/
NONE,

/**
* The null type.
*/
NULL,

/**
* An array type.
*/
ARRAY,

/**
* A class or interface type.
*/
DECLARED,

/**
* A class or interface type that could not be resolved.
*/
ERROR,

/**
* A type variable.
*/
TYPEVAR,

/**
* A wildcard type argument.
*/
WILDCARD,

/**
* A pseudo-type corresponding to a package element.
* @see NoType
*/
PACKAGE,

/**
* A method, constructor, or initializer.
*/
EXECUTABLE,

/**
* An implementation-reserved type.
* This is not the type you are looking for.
*/
OTHER,

/**
* A union type.
*
* @since 1.7
*/
UNION,

/**
* An intersection type.
*
* @since 1.8
*/
INTERSECTION;

/**
* Returns {@code true} if this kind corresponds to a primitive
* type and {@code false} otherwise.
* @return {@code true} if this kind corresponds to a primitive type
*/
public boolean isPrimitive() {
switch(this) {
case BOOLEAN:
case BYTE:
case SHORT:
case INT:
case LONG:
case CHAR:
case FLOAT:
case DOUBLE:
return true;

default:
return false;
}
}
}



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