Clone:

If a list is cloned, it duplicates it and has reference.

Primitive data types are supported.

Parameters:

Not applicable

Sample Code:

Account Account1= new Account(Name=’Test1′);

Account Account2= new Account(Name=’Test2′);

List<Account> AccountList = new List<Account>{Account1, Account2};

List<Account> listDuplicate = new List<Account>();

listDuplicate = AccountList.clone();

AccountList.get(0).Name = ‘Testing1’;

system.debug(AccountList.get(0).Name + ‘,’ + listDuplicate.get(0).Name);

Now AccountList.get(0).Name and listDuplicate get(0).Name will be ‘Testing1’.

listDuplicate.get(0).Name = ‘Testing2’;

system.debug(AccountList.get(0).Name + ‘,’ + listDuplicate.get(0).Name);

Now AccountList.get(0).Name and listDuplicate get(0).Name will be ‘Testing2’.

Deep Clone:

If a list is DeepCloned, it duplicates and doesn’t have any reference.

Primitive data types are not supported.

Parameters:

Boolean opt_preserve_id – Whether cloned sObjects records ids are maintained.

Boolean opt_preserve_readonly_timestamps– Whether cloned sObjects records read only system fields like createdDate, LastMo

Boolean opt_preserve_autonumbe– Whether cloned sObjects records auto number fields are maintained.

Sample Code:

Account Account1= new Account(Name=’Test1′);

Account Account2= new Account(Name=’Test2′);

List<Account> AccountList = new List<Account>{Account1, Account2};

List<Account> listDuplicate = new List<Account>();

listDuplicate = AccountList.deepClone();

AccountList.get(0).Name = ‘Testing1’;

system.debug(AccountList.get(0).Name + ‘,’ + listDuplicate.get(0).Name);

Now AccountList.get(0).Name will be ‘Testing1’ and listDuplicate get(0).Name will be ‘Test1’.

listDuplicate.get(0).Name = ‘Testing2’;

system.debug(AccountList.get(0).Name + ‘,’ + listDuplicate.get(0).Name);

Now AccountList.get(0).Name will be ‘Testing1’ and listDuplicate get(0).Name will be ‘Testing2’.