private static void test3() {
Map map=new LinkedHashMap();
map.put("1","aaa");
map.put("2", "bbb");
map.put("3", "ccc");
//传统方法1
Set set=map.keySet();
Iterator it=set.iterator();
while (it.hasNext()) {
String key=(String) it.next();
String value=(String)map.get(key);
System.out.print(key+"="+value);
}
//增强for循环取第一种方式
for(Object obj:map.keySet()){
String key=(String)obj;
String value=(String)map.get(key);
System.out.print(key+"="+value);
}
}
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