TreeMap简单示例

package cn.itcast.demo;import java.util.Comparator;import java.util.Iterator;import java.util.LinkedHashMap;import java.util.Set;import org.junit.Test;  public class TreeMapTest {@Testpublic void LinkedHashMapTest(){LinkedHashMap lhmap  = new LinkedHashMap();lhmap.put("00", "abd");lhmap.put("1", "abd1");lhmap.put("2", "abd2");lhmap.put("3", "abd3");lhmap.put("4", "abd4");System.out.println(lhmap);Set set = lhmap.keySet();  //获取全部键值，它的返回值类型是setIterator it = set.iterator();while(it.hasNext()){//System.out.println(it.next()+";");  Object obj = it.next();System.out.println(obj+"="+lhmap.get(obj)+";");}}public static void main(String[] args) {// TODO Auto-generated method stub}}