58、salesforce学习笔记（五）

Set集合

Set<String> set1 = new Set<String>();

set1.add('1');

set1.add('2');

Set<String> set2 = set1.clone();

Boolean isEquals = set1.equals(set2);

Boolean isContains = set1.contains('1');

Integer setSize = set1.size();

Iterator<String> Iterator2 = set1.iterator();

while(iterator2.hasNext()){

    System.debug('set item:'+ iterator2.next());

}

Boolean isEmpty = set1.isEmpty();

List<String> anotherList = new String[]{'1','3'};

set1.retainAll(anotherList);

Iterator<String> iterator3 = set1.iterator();

while(iterator3.hasNext()){

    System.debug('set item via retainAll:'+iterator3.next());

}

结果如下所示