散列过滤
1.在一些字符串数组中，常会有重复的记录，比如手机号码，我们可以通过Hashtable来对其进行过滤<div style="padding-right: 5.4pt; padding-left: 5.4pt; background: #e6e6e6 0% 50%; padding-bottom: 4px; width: 95%; padding-top: 4px;">http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gifpublic String[] checkArray(String[] str)...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif Hashtable<String, String> hash=new Hashtable<String, String>();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif for(int i=0;i<str.length;i++)...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif if(!hash.containsKey(str))
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif hash.put(str, str);
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif Enumeration enumeration=hash.keys();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif String[] str_new=new String;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif int i=0;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif while(enumeration.hasMoreElements())...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif str_new=enumeration.nextElement().toString();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif i++;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return str_new;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif }
页:
[1]