Java org.apache.commons.lang BooleanUtils fields, constructors, methods, implement or subclass

Checks if a Boolean value is false, handling null by returning false.

 BooleanUtils.isFalse(Boolean.TRUE)  = false BooleanUtils.isFalse(Boolean.FALSE) = true BooleanUtils.isFalse(null)          = false 

Checks if a Boolean value is not false, handling null by returning true.

 BooleanUtils.isNotFalse(Boolean.TRUE)  = true BooleanUtils.isNotFalse(Boolean.FALSE) = false BooleanUtils.isNotFalse(null)          = true 

Checks if a Boolean value is not true, handling null by returning true.

 BooleanUtils.isNotTrue(Boolean.TRUE)  = false BooleanUtils.isNotTrue(Boolean.FALSE) = true BooleanUtils.isNotTrue(null)          = true 

Checks if a Boolean value is true, handling null by returning false.

 BooleanUtils.isTrue(Boolean.TRUE)  = true BooleanUtils.isTrue(Boolean.FALSE) = false BooleanUtils.isTrue(null)          = false 

Negates the specified boolean.

If null is passed in, null will be returned.

 BooleanUtils.negate(Boolean.TRUE)  = Boolean.FALSE; BooleanUtils.negate(Boolean.FALSE) = Boolean.TRUE; BooleanUtils.negate(null)          = null; 

Converts a Boolean to a boolean handling null by returning false.

 BooleanUtils.toBoolean(Boolean.TRUE)  = true BooleanUtils.toBoolean(Boolean.FALSE) = false BooleanUtils.toBoolean(null)          = false 

Converts an int to a boolean using the convention that zero is false.

 BooleanUtils.toBoolean(0) = false BooleanUtils.toBoolean(1) = true BooleanUtils.toBoolean(2) = true 

Converts a String to a boolean (optimised for performance).

'true', 'on' or 'yes' (case insensitive) will return true.

Converts an int to a boolean specifying the conversion values.

 BooleanUtils.toBoolean(0, 1, 0) = false BooleanUtils.toBoolean(1, 1, 0) = true BooleanUtils.toBoolean(2, 1, 2) = false BooleanUtils.toBoolean(2, 2, 0) = true 

Converts an Integer to a boolean specifying the conversion values.

 BooleanUtils.toBoolean(new Integer(0), new Integer(1), new Integer(0)) = false BooleanUtils.toBoolean(new Integer(1), new Integer(1), new Integer(0)) = true BooleanUtils.toBoolean(new Integer(2), new Integer(1), new Integer(2)) = false BooleanUtils.toBoolean(new Integer(2), new Integer(2), new Integer(0)) = true BooleanUtils.toBoolean(null, null, new Integer(0))                     = true 

Converts a String to a Boolean throwing an exception if no match found.

null is returned if there is no match.

 BooleanUtils.toBoolean("true", "true", "false")  = true BooleanUtils.toBoolean("false", "true", "false") = false 

Converts a Boolean to a boolean handling null.

 BooleanUtils.toBooleanDefaultIfNull(Boolean.TRUE, false) = true BooleanUtils.toBooleanDefaultIfNull(Boolean.FALSE, true) = false BooleanUtils.toBooleanDefaultIfNull(null, true)          = true 

Boolean factory that avoids creating new Boolean objecs all the time.

This method was added to JDK1.4 but is available here for earlier JDKs.

 BooleanUtils.toBooleanObject(false) = Boolean.FALSE BooleanUtils.toBooleanObject(true)  = Boolean.TRUE 

Converts an int to a Boolean using the convention that zero is false.

 BooleanUtils.toBoolean(0) = Boolean.FALSE BooleanUtils.toBoolean(1) = Boolean.TRUE BooleanUtils.toBoolean(2) = Boolean.TRUE 

Converts an Integer to a Boolean using the convention that zero is false.

null will be converted to null.

 BooleanUtils.toBoolean(new Integer(0))    = Boolean.FALSE BooleanUtils.toBoolean(new Integer(1))    = Boolean.TRUE BooleanUtils.toBoolean(new Integer(null)) = null 

Converts a String to a Boolean.

'true', 'on' or 'yes' (case insensitive) will return true.

Converts an int to a Boolean specifying the conversion values.

 BooleanUtils.toBooleanObject(0, 0, 2, 3) = Boolean.TRUE BooleanUtils.toBooleanObject(2, 1, 2, 3) = Boolean.FALSE BooleanUtils.toBooleanObject(3, 1, 2, 3) = null 

Converts an Integer to a Boolean specifying the conversion values.

 BooleanUtils.toBooleanObject(new Integer(0), new Integer(0), new Integer(2), new Integer(3)) = Boolean.TRUE BooleanUtils.toBooleanObject(new Integer(2), new Integer(1), new Integer(2), new Integer(3)) = Boolean.FALSE BooleanUtils.toBooleanObject(new Integer(3), new Integer(1), new Integer(2), new Integer(3)) = null 

Converts a String to a Boolean throwing an exception if no match.

 BooleanUtils.toBooleanObject("true", "true", "false", "null")  = Boolean.TRUE BooleanUtils.toBooleanObject("false", "true", "false", "null") = Boolean.FALSE BooleanUtils.toBooleanObject("null", "true", "false", "null")  = null 

Converts a boolean to an int using the convention that zero is false.

 BooleanUtils.toInteger(true)  = 1 BooleanUtils.toInteger(false) = 0 

Converts a Boolean to an int specifying the conversion values.

 BooleanUtils.toInteger(Boolean.TRUE, 1, 0, 2)  = 1 BooleanUtils.toInteger(Boolean.FALSE, 1, 0, 2) = 0 BooleanUtils.toInteger(null, 1, 0, 2)          = 2 

Converts a boolean to an Integer using the convention that zero is false.

 BooleanUtils.toIntegerObject(true)  = new Integer(1) BooleanUtils.toIntegerObject(false) = new Integer(0) 

Converts a Boolean to a Integer using the convention that zero is false.

null will be converted to null.

 BooleanUtils.toIntegerObject(Boolean.TRUE)  = new Integer(1) BooleanUtils.toIntegerObject(Boolean.FALSE) = new Integer(0) 

Converts a Boolean to a String returning one of the input Strings.

 BooleanUtils.toString(Boolean.TRUE, "true", "false", null)   = "true" BooleanUtils.toString(Boolean.FALSE, "true", "false", null)  = "false" BooleanUtils.toString(null, "true", "false", null)           = null; 

Converts a boolean to a String returning one of the input Strings.

 BooleanUtils.toString(true, "true", "false")   = "true" BooleanUtils.toString(false, "true", "false")  = "false" 

Converts a Boolean to a String returning 'true', 'false', or null.

 BooleanUtils.toStringTrueFalse(Boolean.TRUE)  = "true" BooleanUtils.toStringTrueFalse(Boolean.FALSE) = "false" BooleanUtils.toStringTrueFalse(null)          = null; 

Converts a boolean to a String returning 'true' or 'false'.

 BooleanUtils.toStringTrueFalse(true)   = "true" BooleanUtils.toStringTrueFalse(false)  = "false" 

Converts a Boolean to a String returning 'yes', 'no', or null.

 BooleanUtils.toStringYesNo(Boolean.TRUE)  = "yes" BooleanUtils.toStringYesNo(Boolean.FALSE) = "no" BooleanUtils.toStringYesNo(null)          = null; 

Converts a boolean to a String returning 'yes' or 'no'.

 BooleanUtils.toStringYesNo(true)   = "yes" BooleanUtils.toStringYesNo(false)  = "no" 

Performs an xor on a set of booleans.

 BooleanUtils.xor(new boolean[] { true, true })   = false BooleanUtils.xor(new boolean[] { false, false }) = false BooleanUtils.xor(new boolean[] { true, false })  = true 

Performs an xor on an array of Booleans.

 BooleanUtils.xor(new Boolean[] { Boolean.TRUE, Boolean.TRUE })   = Boolean.FALSE BooleanUtils.xor(new Boolean[] { Boolean.FALSE, Boolean.FALSE }) = Boolean.FALSE BooleanUtils.xor(new Boolean[] { Boolean.TRUE, Boolean.FALSE })  = Boolean.TRUE