java Iterator类应用实例

 

import java.util.*;
public class Stu{
public static void main(String arges[]){

HashMap<String,String> sh=new HashMap<String,String>();
sh.put("1","h");
sh.put("2","e");
sh.put("3","l");
sh.put("4","l");
sh.put("5","o");
Iterator it=sh.entrySet().iterator();
while(it.hasNext()){
Map.Entry entry=(Map.Entry)it.next();
System.out.println("键"+entry.getKey()+" 值"+entry.getValue());

}
}
}

import java.util.*;
import java.util.Iterator;
public class All{
public static void main(String arges[]){
List<String> all=new ArrayList<String>();
all.add("hello");
all.add("world");
Iterator it=all.iterator();
if(it.hasNext()){
while(it.hasNext()){
System.out.println(it.next());
}
}
}

}