List Map迭代 ( 增强For只适合取数据 )
@Test
public void test1(){
List list = new ArrayList();
list.add(DateType);
...
for(Object obj : list){
DateType dateType = (DateType)obj;
}
}
@Test
public void test2(){
Map map = new LinkedHashMap();
map.add(StringValue,DateType);
...
Set set = map.keySet();
Iterator it = set.iterator();
while(it.hasNext()){
String key = (DateType)it.next();
DateType value = (DateType)map.get(key);
}
}
@Test
public void test3(){
Map map = new LinkedHashMap();
map.add(StringValue,DateType);
...
Set set = map.entrySet();
Iterator it = set.iterator();
while(it.hasNext()){
Map.Entry entry = (Entry)it.next();
String key = (String)entry.getKey();
DateType value = (DateType)entry.getValue();
}
}
@Test
public void test4(){
Map map = new LinkedHashMap();
map.add(StringValue,DateType);
...
for(Object obj : map.keySet()){
String key = (String)obj;
DateType value = (DateType)map.get(key);
}
}
@Test
public void test5(){
Map map = new LinkedHashMap();
map.add(StringValue,DateType);
...
for(Object obj : map.entrySet()){
Map.Entry entry = (Entry)obj;
String key = (String)entry.getKey();
DateType value = (DateType)entry.getValue();
}
}
@Test
public void test6(){
Map map = new LinkedHashMap();
map.add(StringValue,DateType);
...
for(Object obj : map.entrySet()){
Map.Entry entry = (Entry)obj;
String key = (String)entry.getKey();
DateType value = (DateType)entry.getValue();
}
}
