Force.com Apex Code Developer's Guide
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Boolean Class
Contains methods for the Boolean primitive data type.
Namespace
Boolean Methods
The following are methods for Boolean. All methods are static.
valueOf(String)
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 toBoolean)
Parameters
- toBoolean
- Type: String
Return Value
Type: Boolean
Usage
If the specified argument is null, this method throws an exception.
Example
1Boolean b = Boolean.valueOf('true');
2System.assertEquals(true, b);valueOf(Object)
Converts the specified history tracking field value to
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:
Example
1List<AccountHistory> ahlist =
2 [SELECT Field,OldValue,NewValue
3 FROM AccountHistory];
4for(AccountHistory ah : ahlist) {
5 System.debug('Field: ' + ah.Field);
6 if (ah.field == 'IsPlatinum__c') {
7 Boolean oldValue =
8 Boolean.valueOf(ah.OldValue);
9 Boolean newValue =
10 Boolean.valueOf(ah.NewValue);
11}