java入门---集合操作实例之HashMap遍历

    以下实例演示了如何使用 Collection 类的 iterator() 方法来遍历集合:

import java.util.*;
 
public class Main {
   public static void main(String[] args) {
      HashMap< String, String> hMap =
      new HashMap< String, String>();
      hMap.put("1", "1st");
      hMap.put("2", "2nd");
      hMap.put("3", "3rd");
      Collection cl = hMap.values();
      Iterator itr = cl.iterator();
      while (itr.hasNext()) {
         System.out.println(itr.next());
     }
   }
}

    以上代码运行输出结果为:

1st
2nd
3rd

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转载自blog.csdn.net/luyaran/article/details/80521247