public Boolean(String string) 
{
        this(parseBoolean(string));
}

Constructs a new {@code Boolean} with its boolean value specified by {@code string}. If {@code string} is not {@code null} and is equal to "true" using a non-case sensitive comparison, the result will be a Boolean representing the primitive value {@code true}, otherwise it will be a Boolean representing the primitive value {@code false}.

Parameters:

string - the string representing a boolean value.

 public Boolean(boolean value) 
{
        this.value = value;
}

Constructs a new {@code Boolean} with the specified primitive boolean value.

Parameters:

value - the primitive boolean value, {@code true} or {@code false}.

 public boolean booleanValue() 
{
        return value;
}

Gets the primitive value of this boolean, either {@code true} or {@code false}.

 public int compareTo(Boolean that) 
{
        if (that == null) {
            throw new NullPointerException();
        }
        if (this.value == that.value) {
            return 0;
        }
        return this.value ? 1 : -1;
}

Compares this object to the specified boolean object to determine their relative order.

 public boolean equals(Object o) 
{
        return (o == this)
                || ((o instanceof Boolean) && (value == ((Boolean) o).value));
}

Compares this instance with the specified object and indicates if they are equal. In order to be equal, {@code o} must be an instance of {@code Boolean} and have the same boolean value as this object.

 public static boolean getBoolean(String string) 
{
        if (string == null || string.length() == 0) {
            return false;
        }
        return (parseBoolean(System.getProperty(string)));
}

Returns the {@code boolean} value of the system property identified by {@code string}.

 public int hashCode() 
{
        return value ? 1231 : 1237;
}

Returns an integer hash code for this boolean.

 public static boolean parseBoolean(String s) 
{
        return "true".equalsIgnoreCase(s); //$NON-NLS-1$
}

Parses the specified string as a {@code boolean}.

 public String toString() 
{
        return String.valueOf(value);
}

Returns a string containing a concise, human-readable description of this boolean.

 public static String toString(boolean value) 
{
        return String.valueOf(value);
}

Converts the specified boolean to its string representation.

 public static Boolean valueOf(String string) 
{
        return parseBoolean(string) ? Boolean.TRUE : Boolean.FALSE;
}

Parses the specified string as a boolean value.

 public static Boolean valueOf(boolean b) 
{
        return b ? Boolean.TRUE : Boolean.FALSE;
}

Returns a {@code Boolean} instance for the specified boolean value.

If it is not necessary to get a new {@code Boolean} instance, it is recommended to use this method instead of the constructor, since it returns its static instances, which results in better performance.