Class Boolean

public static final Boolean FALSE

This field is a Boolean object representing the primitive value false. This instance is returned by the static valueOf() methods if they return a Boolean representing false.

public static final Boolean TRUE

This field is a Boolean object representing the primitive value true. This instance is returned by the static valueOf() methods if they return a Boolean representing true.

public static final Class TYPE

The primitive type boolean is represented by this Class object.

Since:

1.1

public Boolean(boolean value)

Create a Boolean object representing the value of the argument value. In general the use of the static method valueof(boolean) is more efficient since it will not create a new object.

Parameters:

value - the primitive value of this Boolean

See Also:

valueOf(boolean)

public Boolean(String s)

Creates a Boolean object representing the primitive true if and only if s matches the string "true" ignoring case, otherwise the object will represent the primitive false. In general the use of the static method valueof(String) is more efficient since it will not create a new object.

Parameters:

s - the String representation of true or false

public boolean booleanValue()

Return the primitive boolean value of this Boolean object.

Returns:

true or false, depending on the value of this Boolean

public int compareTo(Boolean other)

Compares this Boolean to another.

Parameters:

other - the Boolean to compare this Boolean to

Returns:

0 if both Booleans represent the same value, a positive number if this Boolean represents true and the other false, and a negative number otherwise.

Since:

1.5

public boolean equals(Object obj)

If the obj is an instance of Boolean and has the same primitive value as this object then true is returned. In all other cases, including if the obj is null, false is returned.

Overrides:

equals in interface Object

Parameters:

obj - possibly an instance of any Class

Returns:

true if obj equals this

public static boolean getBoolean(String name)

If the value of the system property name matches "true" ignoring case then the function returns true.

Parameters:

name - the property name to look up

Returns:

true if the property resulted in "true"

Throws:

SecurityException - if accessing the system property is forbidden

See Also:

System.getProperty(String)

public int hashCode()

Returns the integer 1231 if this object represents the primitive true and the integer 1237 otherwise.

Overrides:

hashCode in interface Object

Returns:

the hash code

public static boolean parseBoolean(String b)

If the String argument is "true", ignoring case, return true. Otherwise, return false.

Parameters:

b - String to parse

Since:

1.5

public String toString()

Returns "true" if the value of this object is true and returns "false" if the value of this object is false.

Overrides:

toString in interface Object

Returns:

the string representation of this

public static String toString(boolean b)

Returns "true" if the value of the give boolean is true and returns "false" if the value of the given boolean is false.

Parameters:

b - the boolean to convert

Returns:

the string representation of the boolean

Since:

1.4

public static Boolean valueOf(boolean b)

Returns the Boolean TRUE if the given boolean is true, otherwise it will return the Boolean FALSE.

Parameters:

b - the boolean to wrap

Returns:

the wrapper object

Since:

1.4

See Also:

TRUE, FALSE

public static Boolean valueOf(String s)

Returns the Boolean TRUE if and only if the given String is equal, ignoring case, to the the String "true", otherwise it will return the Boolean FALSE.

Parameters:

s - the string to convert

Returns:

a wrapped boolean from the string