java中的集合SetEntry

package jp.co.dragonsoftit.d0001;import java.io.BufferedReader;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.HashSet;import java.util.Iterator;import java.util.List;import java.util.Map.Entry;import java.util.Set;public class list {public static void main(String args[]){//System.out.println("&&&&&&&&&&&");hashentryset();}public static void hashentryset(){List<String> filecontent = new ArrayList<String>();String contentstr =""; String userid=""; String username="";//System.out.println("&&&&&&&&&&&");HashMap<String,HashMap<String,Set<method>>> ht3 =new HashMap<String,HashMap<String,Set<method>>>();HashMap<String,Set<method>> ht2 =new HashMap<String,Set<method>>();Set<method> ht1 =null;method mthod = null;searcher.getInstance().iffind();//for(int m=0;m<10;m++){//ht3 =new HashMap<String,HashMap<String,Set<method>>>();for(int k=0;k<10;k++){ht2 =new HashMap<String,Set<method>>();for(int j=0;j<10;j++){ht1 =new HashSet<method>();for(int i=0;i<10;i++){mthod=new method();mthod.setUserid("1001"+i);mthod.setUsername("cxl001"+i);ht1.add(mthod);}ht2.put("ht2"+j, ht1);}ht3.put("ht3"+k, ht2);}//}for(Entry<String,HashMap<String,Set<method>>> ht3sub:ht3.entrySet()){String ht3key =ht3sub.getKey();filecontent = new ArrayList<String>();HashMap<String,Set<method>> ht3value =ht3sub.getValue();for(Entry<String,Set<method>> ht2sub:ht3value.entrySet()){String ht2key =ht2sub.getKey();contentstr = "/""+ht3key+"."+ht2key+"/",/n";filecontent.add(contentstr);Set<method> ht2value =ht2sub.getValue();Iterator ite = ht2value.iterator(); while(ite.hasNext()){//for(method mthd:ht2value){method mtd =(method)ite.next();userid =mtd.getUserid();username =mtd.getUsername();//filecontent = new ArrayList<String>();filecontent.add("/"/","+"/""+userid+"::"+username+"/",/n");//}}}createcsvfile("E:/document/1/"+"fname"+ht3key+".csv",filecontent);}}public static void createcsvfile(String filename,List filecontent){File f = new File(filename);//BufferedReader br = new BufferedReader(f);FileWriter fw =null;try {fw =new FileWriter(f);for(int i=0;i<filecontent.size();i++){fw.write((String)filecontent.get(i));}//fw.write((String)filecontent.get(0));} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{try{fw.close();}catch (IOException e) {}}}}class method{private String userid;private String username;public String getUserid() {return userid;}public void setUserid(String userid) {this.userid = userid;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}}