java.lang.Boolean Maven / Gradle / Ivy

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This work corresponds to the API signatures of JSR 219: Foundation Profile 1.1. In the event of a discrepency between this work and the JSR 219 specification, which is available at http://www.jcp.org/en/jsr/detail?id=219, the latter takes precedence. */ package java.lang; /** * The Boolean class wraps a value of the primitive type * boolean in an object. An object of type * Boolean contains a single field whose type is * boolean. *

* In addition, this class provides many methods for * converting a boolean to a String and a * String to a boolean, as well as other * constants and methods useful when dealing with a * boolean. * * @author Arthur van Hoff * @version 1.38, 02/02/00 * @since JDK1.0 */ public final class Boolean implements java.io.Serializable { /** * The Boolean object corresponding to the primitive * value true. */ public static final java.lang.Boolean TRUE = null; /** * The Boolean object corresponding to the primitive * value false. */ public static final java.lang.Boolean FALSE = null; /** * The Class object representing the primitive type boolean. * * @since JDK1.1 */ public static final java.lang.Class TYPE = null; /** * The value of the Boolean. * * @serial */ private boolean value; /** use serialVersionUID from JDK 1.0.2 for interoperability */ private static final long serialVersionUID = -3665804199014368530L; /** * Allocates a Boolean object representing the * value argument. * *

Note: It is rarely appropriate to use this constructor. * Unless a new instance is required, the static factory * {@link #valueOf(boolean)} is generally a better choice. It is * likely to yield significantly better space and time performance. * * @param value the value of the Boolean. */ public Boolean(boolean value) { } /** * Allocates a Boolean object representing the value * true if the string argument is not null * and is equal, ignoring case, to the string "true". * Otherwise, allocate a Boolean object representing the * value false. Examples:

* new Boolean("True") produces a Boolean object * that represents true.
* new Boolean("yes") produces a Boolean object * that represents false. * * @param s the string to be converted to a Boolean. */ public Boolean(java.lang.String s) { } /** * Returns the value of this Boolean object as a boolean * primitive. * * @return the primitive boolean value of this object. */ public boolean booleanValue() { return false; } /** * Returns a Boolean instance representing the specified * boolean value. If the specified boolean value * is true, this method returns Boolean.TRUE; * if it is false, this method returns Boolean.FALSE. * If a new Boolean instance is not required, this method * should generally be used in preference to the constructor * {@link #Boolean(boolean)}, as this method is likely to to yield * significantly better space and time performance. * * @param b a boolean value. * @return a Boolean instance representing b. * @since 1.4 */ public static java.lang.Boolean valueOf(boolean b) { return null; } /** * Returns a Boolean with a value represented by the * specified String. The Boolean returned represents the * value true if the string argument is not null * and is equal, ignoring case, to the string "true".

* Example: Boolean.valueOf("True") returns true.
* Example: Boolean.valueOf("yes") returns false. * * @param s a string. * @return the Boolean value represented by the string. */ public static java.lang.Boolean valueOf(java.lang.String s) { return null; } /** * Returns a String object representing the specified * boolean. If the specified boolean is true, then * the string "true" will be returned, otherwise the * string "false" will be returned. * * @param b the boolean to be converted * @return the string representation of the specified boolean * @since 1.4 */ public static java.lang.String toString(boolean b) { return null; } /** * Returns a String object representing this Boolean's * value. If this object represents the value true, * a string equal to "true" is returned. Otherwise, a * string equal to "false" is returned. * * @return a string representation of this object. */ public java.lang.String toString() { return null; } /** * Returns a hash code for this Boolean object. * * @return the integer 1231 if this object represents * true; returns the integer 1237 if this * object represents false. */ public int hashCode() { return 0; } /** * Returns true if and only if the argument is not * null and is a Boolean object that * represents the same boolean value as this object. * * @param obj the object to compare with. * @return true if the Boolean objects represent the * same value; false otherwise. */ public boolean equals(java.lang.Object obj) { return false; } /** * Returns true if and only if the system property * named by the argument exists and is equal to the string * "true". (Beginning with version 1.0.2 of the * Java^TM platform, the test of * this string is case insensitive.) A system property is accessible * through getProperty, a method defined by the * System class. *