1.package edu.smc.test; 2. 3.import java.util.HashMap; 4.import java.util.Iterator; 5.import java.util.Map; 6.import java.util.Map.Entry; 7. 8.public class TestEntrySet { 9. public static void main(String[] args) { 10. Map<String,String> map=new HashMap<String,String>(); 11. map.put("1", "张三"); 12. map.put("2", "李四"); 13. map.put("3", "王五"); 14. /*方法一 :迭代程序*/ 15. System.out.println("方法一:"); 16. Iterator iterator=map.entrySet().iterator(); 17. while(iterator.hasNext()){ 18. Map.Entry<String, String> entry= (Entry<String, String>) iterator.next(); 19. System.out.println("key:"+entry.getKey()+" value"+entry.getValue()); 20. } 21. /*方法二*/ 22. System.out.println("方法二:"); 23. for (Map.Entry<String, String> m : map.entrySet()) { 24. System.out.println("key:"+m.getKey()+" value"+m.getValue()); 25. } 26. } 27.} package edu.smc.test; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; public class TestEntrySet { public static void main(String[] args) { Map<String,String> map=new HashMap<String,String>(); map.put("1", "张三"); map.put("2", "李四"); map.put("3", "王五"); /*方法一 :迭代程序*/ System.out.println("方法一:"); Iterator iterator=map.entrySet().iterator(); while(iterator.hasNext()){ Map.Entry<String, String> entry= (Entry<String, String>) iterator.next(); System.out.println("key:"+entry.getKey()+" value"+entry.getValue()); } /*方法二*/ System.out.println("方法二:"); for (Map.Entry<String, String> m : map.entrySet()) { System.out.println("key:"+m.getKey()+" value"+m.getValue()); } } } 结果: [html] view plaincopyprint? 1.方法一: 2.key:3 value王五 3.key:2 value李四 4.key:1 value张三 5.方法二: 6.key:3 value王五 7.key:2 value李四 8.key:1 value张三