Boolean Class

Contains methods for the Boolean primitive data type.

Namespace

System

Boolean Methods

The following are methods for Boolean. All methods are static.

valueOf(stringToBoolean)

Converts the specified string to a Boolean value and returns true if the specified string value is true. Otherwise, returns false.

Signature

public static Boolean valueOf(String stringToBoolean)

Parameters

stringToBoolean
Type: String

Return Value

Type: Boolean

Usage

If the specified argument is null, this method throws an exception.

Example

Boolean b = Boolean.valueOf('true');
System.assertEquals(true, b);

valueOf(fieldValue)

Converts the specified object to a Boolean value. Use this method to convert a history tracking field value or an object that represents a Boolean value.

Signature

public static Boolean valueOf(Object fieldValue)

Parameters

fieldValue
Type: Object

Return Value

Type: Boolean

Usage

Use this method with the OldValue or NewValue fields of history sObjects, such as AccountHistory, when the field type corresponds to a Boolean type, like a checkbox field.

Example

List<AccountHistory> ahlist = 
  [SELECT Field,OldValue,NewValue
   FROM AccountHistory];
for(AccountHistory ah : ahlist) {
  System.debug('Field: ' + ah.Field);
  if (ah.field == 'IsPlatinum__c') {
    Boolean oldValue = 
      Boolean.valueOf(ah.OldValue);
    Boolean newValue = 
      Boolean.valueOf(ah.NewValue);
}