Java Map,List,Vector,Set遍历

Java Map,List,Vector,Set遍历

package chn.lass.liu.collection;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class MapTest {
 public static Map<String,String> createMap(){
  Map<String,String> map=new HashMap<String, String>();
  map.put("a", "111");
  map.put("b", "222");
  return map;
 }
 public static void parseMap(Map<String,String> map){
  for(Iterator it=map.entrySet().iterator();it.hasNext();){
   Map.Entry entry=(Map.Entry)it.next();
   System.out.println("key="+entry.getKey());
   System.out.println("value="+entry.getValue());
   if("a".equals(entry.getKey())){
    it.remove();
   }
  }
  for(Iterator it=map.entrySet().iterator();it.hasNext();){
   Map.Entry entry=(Map.Entry)it.next();
   System.out.println("key1="+entry.getKey());
   System.out.println("value1="+entry.getValue());
  }
 }
 public static void main(String[] args) {
  Map<String,String> map=createMap();
  parseMap(map);
 }
}

package chn.lass.liu.collection;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ListTest {
 public static List<String> createList(){
  List<String> list=new ArrayList<String>();
  for(int i=0;i<5;i++){
   list.add(""+i);
  }
  return list;
 }
 public static void ParseList(List<String> list){
  for(Iterator it=list.iterator();it.hasNext();){
   String its=(String)it.next();
   System.out.println("list is:"+its);
   it.remove();
  }
 }
 public static void main(String[] args) {
   List<String> list=createList();
   ParseList(list);
 }
}

package chn.lass.liu.collection;

import java.util.Iterator;
import java.util.Vector;

public class VectorTest {
 public static Vector<String> createVector(){
  Vector<String> vector=new Vector<String>();
  vector.addElement("aa");
  vector.addElement("bb");
  return vector;
 }
 public static void parseVector(Vector<String> vector){
  for(Iterator it=vector.iterator();it.hasNext();){
   String its=(String)it.next();
   System.out.println("its is:"+its);
  }
 }
 public static void main(String[] args) {
  Vector<String> vector=createVector();
  parseVector(vector);
 }
}

package chn.lass.liu.collection;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class SetTest {
 public static Set<String> createSet(){
  Set<String> set=new HashSet<String>();
  set.add("a");
  set.add("b");
  return set;
 }
 public static void parseSet(Set<String> set){
  for(Iterator it=set.iterator();it.hasNext();){
   String its=(String)it.next();
   System.out.println("its is:"+its);
  }
 }
 public static void main(String[] args) {
  Set<String> set=createSet();
  parseSet(set);
 }
}