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Showing content from https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html below:

Boolean (Java Platform SE 8 )

java.lang.Object
- java.lang.Boolean

All Implemented Interfaces:

Serializable, Comparable<Boolean>
```
public final class Boolean
extends Object
implements Serializable, Comparable<Boolean>
```
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.

Since:

JDK1.0

See Also:

Serialized Form

- Field Summary Fields Modifier and Type Field Description static Boolean FALSE
  The Boolean object corresponding to the primitive value false.
  static Boolean TRUE
  The Boolean object corresponding to the primitive value true.
  static Class<Boolean> TYPE
  The Class object representing the primitive type boolean.
- Constructor Summary Constructors Constructor Description Boolean(boolean value)
  Allocates a Boolean object representing the value argument.
  Boolean(String s)
  Allocates a Boolean object representing the value true if the string argument is not null and is equal, ignoring case, to the string "true".
- Method Summary All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean booleanValue()
  Returns the value of this Boolean object as a boolean primitive.
  static int compare(boolean x, boolean y)
  Compares two boolean values.
  int compareTo(Boolean b)
  Compares this Boolean instance with another.
  boolean equals(Object obj)
  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.
  static boolean getBoolean(String name)
  Returns true if and only if the system property named by the argument exists and is equal to the string "true".
  int hashCode()
  Returns a hash code for this Boolean object.
  static int hashCode(boolean value)
  Returns a hash code for a boolean value; compatible with Boolean.hashCode().
  static boolean logicalAnd(boolean a, boolean b)
  Returns the result of applying the logical AND operator to the specified boolean operands.
  static boolean logicalOr(boolean a, boolean b)
  Returns the result of applying the logical OR operator to the specified boolean operands.
  static boolean logicalXor(boolean a, boolean b)
  Returns the result of applying the logical XOR operator to the specified boolean operands.
  static boolean parseBoolean(String s)
  Parses the string argument as a boolean.
  String toString()
  Returns a String object representing this Boolean's value.
  static String toString(boolean b)
  Returns a String object representing the specified boolean.
  static Boolean valueOf(boolean b)
  Returns a Boolean instance representing the specified boolean value.
  static Boolean valueOf(String s)
  Returns a Boolean with a value represented by the specified string.
  - Methods inherited from class java.lang.Objectclone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - TRUE
```
public static final Boolean TRUE
```
    The Boolean object corresponding to the primitive value true.
  - FALSE
```
public static final Boolean FALSE
```
    The Boolean object corresponding to the primitive value false.
  - TYPE
```
public static final Class<Boolean> TYPE
```
    The Class object representing the primitive type boolean.
    
    Since:
    
    JDK1.1
- Constructor Detail
  - Boolean
```
public Boolean(boolean value)
```
    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 valueOf(boolean) is generally a better choice. It is likely to yield significantly better space and time performance.
    
    Parameters:
    
    value - the value of the Boolean.
  - Boolean
```
public Boolean(String s)
```
    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.
    
    Parameters:
    
    s - the string to be converted to a Boolean.
- Method Detail
  - parseBoolean
```
public static boolean parseBoolean(String s)
```
    Parses the string argument as a boolean. 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.parseBoolean("True") returns true.
    Example: Boolean.parseBoolean("yes") returns false.
    
    Parameters:
    
    s - the String containing the boolean representation to be parsed
    
    Returns:
    
    the boolean represented by the string argument
    
    Since:
    
    1.5
  - booleanValue
```
public boolean booleanValue()
```
    Returns the value of this Boolean object as a boolean primitive.
    
    Returns:
    
    the primitive boolean value of this object.
  - valueOf
```
public static Boolean valueOf(boolean b)
```
    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
    Boolean(boolean)
    , as this method is likely to yield significantly better space and time performance.
    
    Parameters:
    
    b - a boolean value.
    
    Returns:
    
    a Boolean instance representing b.
    
    Since:
    
    1.4
  - valueOf
```
public static Boolean valueOf(String s)
```
    Returns a Boolean with a value represented by the specified string. The Boolean returned represents a true value if the string argument is not null and is equal, ignoring case, to the string "true".
    
    Parameters:
    
    s - a string.
    
    Returns:
    
    the Boolean value represented by the string.
  - toString
```
public static String toString(boolean b)
```
    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.
    
    Parameters:
    
    b - the boolean to be converted
    
    Returns:
    
    the string representation of the specified boolean
    
    Since:
    
    1.4
  - toString
```
public String toString()
```
    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.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a string representation of this object.
  - hashCode
```
public int hashCode()
```
    Returns a hash code for this Boolean object.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    
    the integer 1231 if this object represents true; returns the integer 1237 if this object represents false.
    
    See Also:
    
    Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)
  - hashCode
```
public static int hashCode(boolean value)
```
    Returns a hash code for a boolean value; compatible with Boolean.hashCode().
    
    Parameters:
    
    value - the value to hash
    
    Returns:
    
    a hash code value for a boolean value.
    
    Since:
    
    1.8
  - equals
```
public boolean equals(Object obj)
```
    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.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    
    obj - the object to compare with.
    
    Returns:
    
    true if the Boolean objects represent the same value; false otherwise.
    
    See Also:
    
    Object.hashCode(), HashMap
  - getBoolean
```
public static boolean getBoolean(String name)
```
    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.
    
    If there is no property with the specified name, or if the specified name is empty or null, then false is returned.
    
    Parameters:
    
    name - the system property name.
    
    Returns:
    
    the boolean value of the system property.
    
    Throws:
    
    SecurityException - for the same reasons as System.getProperty
    
    See Also:
    
    System.getProperty(java.lang.String), System.getProperty(java.lang.String, java.lang.String)
  - compareTo
```
public int compareTo(Boolean b)
```
    Compares this Boolean instance with another.
    
    Specified by:
    
    compareTo in interface Comparable<Boolean>
    
    Parameters:
    
    b - the Boolean instance to be compared
    
    Returns:
    
    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 null
    
    Since:
    
    1.5
    
    See Also:
    
    Comparable
  - compare
```
public static int compare(boolean x,
                          boolean y)
```
    Compares two
    boolean
    values. The value returned is identical to what would be returned by:
```
    Boolean.valueOf(x).compareTo(Boolean.valueOf(y))
 
```
    Parameters:
    
    x - the first boolean to compare
    
    y - the second boolean to compare
    
    Returns:
    
    the value 0 if x == y; a value less than 0 if !x && y; and a value greater than 0 if x && !y
    
    Since:
    
    1.7
  - logicalAnd
```
public static boolean logicalAnd(boolean a,
                                 boolean b)
```
    Returns the result of applying the logical AND operator to the specified boolean operands.
    
    Parameters:
    
    a - the first operand
    
    b - the second operand
    
    Returns:
    
    the logical AND of a and b
    
    Since:
    
    1.8
    
    See Also:
    
    BinaryOperator
  - logicalOr
```
public static boolean logicalOr(boolean a,
                                boolean b)
```
    Returns the result of applying the logical OR operator to the specified boolean operands.
    
    Parameters:
    
    a - the first operand
    
    b - the second operand
    
    Returns:
    
    the logical OR of a and b
    
    Since:
    
    1.8
    
    See Also:
    
    BinaryOperator
  - logicalXor
```
public static boolean logicalXor(boolean a,
                                 boolean b)
```
    Returns the result of applying the logical XOR operator to the specified boolean operands.
    
    Parameters:
    
    a - the first operand
    
    b - the second operand
    
    Returns:
    
    the logical XOR of a and b
    
    Since:
    
    1.8
    
    See Also:
    
    BinaryOperator

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