--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/lang/Boolean.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,346 @@
+/*
+ * Copyright (c) 1994, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.lang;
+
+import jdk.internal.HotSpotIntrinsicCandidate;
+
+/**
+ * The Boolean class wraps a value of the primitive type
+ * {@code boolean} in an object. An object of type
+ * {@code Boolean} contains a single field whose type is
+ * {@code boolean}.
+ * <p>
+ * In addition, this class provides many methods for
+ * converting a {@code boolean} to a {@code String} and a
+ * {@code String} to a {@code boolean}, as well as other
+ * constants and methods useful when dealing with a
+ * {@code boolean}.
+ *
+ * @author Arthur van Hoff
+ * @since 1.0
+ */
+public final class Boolean implements java.io.Serializable,
+ Comparable<Boolean>
+{
+ /**
+ * The {@code Boolean} object corresponding to the primitive
+ * value {@code true}.
+ */
+ public static final Boolean TRUE = new Boolean(true);
+
+ /**
+ * The {@code Boolean} object corresponding to the primitive
+ * value {@code false}.
+ */
+ public static final Boolean FALSE = new Boolean(false);
+
+ /**
+ * The Class object representing the primitive type boolean.
+ *
+ * @since 1.1
+ */
+ @SuppressWarnings("unchecked")
+ public static final Class<Boolean> TYPE = (Class<Boolean>) Class.getPrimitiveClass("boolean");
+
+ /**
+ * The value of the Boolean.
+ *
+ * @serial
+ */
+ private final boolean value;
+
+ /** use serialVersionUID from JDK 1.0.2 for interoperability */
+ private static final long serialVersionUID = -3665804199014368530L;
+
+ /**
+ * Allocates a {@code Boolean} object representing the
+ * {@code value} argument.
+ *
+ * @param value the value of the {@code Boolean}.
+ *
+ * @deprecated
+ * It is rarely appropriate to use this constructor. The static factory
+ * {@link #valueOf(boolean)} is generally a better choice, as it is
+ * likely to yield significantly better space and time performance.
+ * Also consider using the final fields {@link #TRUE} and {@link #FALSE}
+ * if possible.
+ */
+ @Deprecated(since="9")
+ public Boolean(boolean value) {
+ this.value = value;
+ }
+
+ /**
+ * Allocates a {@code Boolean} object representing the value
+ * {@code true} if the string argument is not {@code null}
+ * and is equal, ignoring case, to the string {@code "true"}.
+ * Otherwise, allocates a {@code Boolean} object representing the
+ * value {@code false}.
+ *
+ * @param s the string to be converted to a {@code Boolean}.
+ *
+ * @deprecated
+ * It is rarely appropriate to use this constructor.
+ * Use {@link #parseBoolean(String)} to convert a string to a
+ * {@code boolean} primitive, or use {@link #valueOf(String)}
+ * to convert a string to a {@code Boolean} object.
+ */
+ @Deprecated(since="9")
+ public Boolean(String s) {
+ this(parseBoolean(s));
+ }
+
+ /**
+ * Parses the string argument as a boolean. The {@code boolean}
+ * returned represents the value {@code true} if the string argument
+ * is not {@code null} and is equal, ignoring case, to the string
+ * {@code "true"}.
+ * Otherwise, a false value is returned, including for a null
+ * argument.<p>
+ * Example: {@code Boolean.parseBoolean("True")} returns {@code true}.<br>
+ * Example: {@code Boolean.parseBoolean("yes")} returns {@code false}.
+ *
+ * @param s the {@code String} containing the boolean
+ * representation to be parsed
+ * @return the boolean represented by the string argument
+ * @since 1.5
+ */
+ public static boolean parseBoolean(String s) {
+ return ((s != null) && s.equalsIgnoreCase("true"));
+ }
+
+ /**
+ * Returns the value of this {@code Boolean} object as a boolean
+ * primitive.
+ *
+ * @return the primitive {@code boolean} value of this object.
+ */
+ @HotSpotIntrinsicCandidate
+ public boolean booleanValue() {
+ return value;
+ }
+
+ /**
+ * Returns a {@code Boolean} instance representing the specified
+ * {@code boolean} value. If the specified {@code boolean} value
+ * is {@code true}, this method returns {@code Boolean.TRUE};
+ * if it is {@code false}, this method returns {@code Boolean.FALSE}.
+ * If a new {@code 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 yield
+ * significantly better space and time performance.
+ *
+ * @param b a boolean value.
+ * @return a {@code Boolean} instance representing {@code b}.
+ * @since 1.4
+ */
+ @HotSpotIntrinsicCandidate
+ public static Boolean valueOf(boolean b) {
+ return (b ? TRUE : FALSE);
+ }
+
+ /**
+ * Returns a {@code Boolean} with a value represented by the
+ * specified string. The {@code Boolean} returned represents a
+ * true value if the string argument is not {@code null}
+ * and is equal, ignoring case, to the string {@code "true"}.
+ * Otherwise, a false value is returned, including for a null
+ * argument.
+ *
+ * @param s a string.
+ * @return the {@code Boolean} value represented by the string.
+ */
+ public static Boolean valueOf(String s) {
+ return parseBoolean(s) ? TRUE : FALSE;
+ }
+
+ /**
+ * Returns a {@code String} object representing the specified
+ * boolean. If the specified boolean is {@code true}, then
+ * the string {@code "true"} will be returned, otherwise the
+ * string {@code "false"} will be returned.
+ *
+ * @param b the boolean to be converted
+ * @return the string representation of the specified {@code boolean}
+ * @since 1.4
+ */
+ public static String toString(boolean b) {
+ return b ? "true" : "false";
+ }
+
+ /**
+ * Returns a {@code String} object representing this Boolean's
+ * value. If this object represents the value {@code true},
+ * a string equal to {@code "true"} is returned. Otherwise, a
+ * string equal to {@code "false"} is returned.
+ *
+ * @return a string representation of this object.
+ */
+ public String toString() {
+ return value ? "true" : "false";
+ }
+
+ /**
+ * Returns a hash code for this {@code Boolean} object.
+ *
+ * @return the integer {@code 1231} if this object represents
+ * {@code true}; returns the integer {@code 1237} if this
+ * object represents {@code false}.
+ */
+ @Override
+ public int hashCode() {
+ return Boolean.hashCode(value);
+ }
+
+ /**
+ * Returns a hash code for a {@code boolean} value; compatible with
+ * {@code Boolean.hashCode()}.
+ *
+ * @param value the value to hash
+ * @return a hash code value for a {@code boolean} value.
+ * @since 1.8
+ */
+ public static int hashCode(boolean value) {
+ return value ? 1231 : 1237;
+ }
+
+ /**
+ * Returns {@code true} if and only if the argument is not
+ * {@code null} and is a {@code Boolean} object that
+ * represents the same {@code boolean} value as this object.
+ *
+ * @param obj the object to compare with.
+ * @return {@code true} if the Boolean objects represent the
+ * same value; {@code false} otherwise.
+ */
+ public boolean equals(Object obj) {
+ if (obj instanceof Boolean) {
+ return value == ((Boolean)obj).booleanValue();
+ }
+ return false;
+ }
+
+ /**
+ * Returns {@code true} if and only if the system property named
+ * by the argument exists and is equal to, ignoring case, the
+ * string {@code "true"}.
+ * A system property is accessible through {@code getProperty}, a
+ * method defined by the {@code System} class. <p> If there is no
+ * property with the specified name, or if the specified name is
+ * empty or null, then {@code false} is returned.
+ *
+ * @param name the system property name.
+ * @return the {@code boolean} value of the system property.
+ * @throws SecurityException for the same reasons as
+ * {@link System#getProperty(String) System.getProperty}
+ * @see java.lang.System#getProperty(java.lang.String)
+ * @see java.lang.System#getProperty(java.lang.String, java.lang.String)
+ */
+ public static boolean getBoolean(String name) {
+ boolean result = false;
+ try {
+ result = parseBoolean(System.getProperty(name));
+ } catch (IllegalArgumentException | NullPointerException e) {
+ }
+ return result;
+ }
+
+ /**
+ * Compares this {@code Boolean} instance with another.
+ *
+ * @param b the {@code Boolean} instance to be compared
+ * @return zero if this object represents the same boolean value as the
+ * argument; a positive value if this object represents true
+ * and the argument represents false; and a negative value if
+ * this object represents false and the argument represents true
+ * @throws NullPointerException if the argument is {@code null}
+ * @see Comparable
+ * @since 1.5
+ */
+ public int compareTo(Boolean b) {
+ return compare(this.value, b.value);
+ }
+
+ /**
+ * Compares two {@code boolean} values.
+ * The value returned is identical to what would be returned by:
+ * <pre>
+ * Boolean.valueOf(x).compareTo(Boolean.valueOf(y))
+ * </pre>
+ *
+ * @param x the first {@code boolean} to compare
+ * @param y the second {@code boolean} to compare
+ * @return the value {@code 0} if {@code x == y};
+ * a value less than {@code 0} if {@code !x && y}; and
+ * a value greater than {@code 0} if {@code x && !y}
+ * @since 1.7
+ */
+ public static int compare(boolean x, boolean y) {
+ return (x == y) ? 0 : (x ? 1 : -1);
+ }
+
+ /**
+ * Returns the result of applying the logical AND operator to the
+ * specified {@code boolean} operands.
+ *
+ * @param a the first operand
+ * @param b the second operand
+ * @return the logical AND of {@code a} and {@code b}
+ * @see java.util.function.BinaryOperator
+ * @since 1.8
+ */
+ public static boolean logicalAnd(boolean a, boolean b) {
+ return a && b;
+ }
+
+ /**
+ * Returns the result of applying the logical OR operator to the
+ * specified {@code boolean} operands.
+ *
+ * @param a the first operand
+ * @param b the second operand
+ * @return the logical OR of {@code a} and {@code b}
+ * @see java.util.function.BinaryOperator
+ * @since 1.8
+ */
+ public static boolean logicalOr(boolean a, boolean b) {
+ return a || b;
+ }
+
+ /**
+ * Returns the result of applying the logical XOR operator to the
+ * specified {@code boolean} operands.
+ *
+ * @param a the first operand
+ * @param b the second operand
+ * @return the logical XOR of {@code a} and {@code b}
+ * @see java.util.function.BinaryOperator
+ * @since 1.8
+ */
+ public static boolean logicalXor(boolean a, boolean b) {
+ return a ^ b;
+ }
+}