package com.xing.lab.util;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
public class TraverseHashTable {
public static void main(String[] args) {
Hashtable hashtable = new Hashtable();
hashtable.put("1", "aa");
hashtable.put("2", "bb");
hashtable.put("3", "cc");
//第一种hashtable遍历方式
System.out.println("第一种遍历方式");
for (Iterator iterator = hashtable.keySet().iterator();iterator.hasNext();) {
String key = iterator.next();
System.out.println("key-----" + key);
System.out.println("value--------" + hashtable.get(key));
}
//第二种hashtable遍历方式
System.out.println("第二种遍历方式");
for (Iterator> iterator = hashtable.entrySet().iterator();
iterator.hasNext();) {
Entry entry = iterator.next();
System.out.println("key---------" + entry.getKey());
System.out.println("value------------" + entry.getValue());
}
//第三种hashtable遍历方式
System.out.println("第三种遍历方式");
for (Map.Entry entry : hashtable.entrySet()) {
System.out.println("key---------" + entry.getKey());
System.out.println("value--------" + entry.getValue());
}
//第四种遍历方式
System.out.println("第四种遍历方式");
Enumeration e = hashtable.keys();
while (e.hasMoreElements()) {
String key = e.nextElement();
System.out.println("key-----" + key);
System.out.println("value-------" + hashtable.get(key));
}
//第五中遍历方式(获取所有的值)
System.out.println("第五种遍历方式");
Enumeration e2 = hashtable.elements();
while (e2.hasMoreElements()) {
String string = (String) e2.nextElement();
System.out.println(string);
}
}
}