JAVA Map 和 List 排序方法

private Map<String,String> mapDate;

//正序
mapDate=new TreeMap<String, String>(new Comparator<String>() {

@Override
public int compare(String lhs, String rhs) {
// TODO Auto-generated method stub
return lhs.compareTo(rhs);
}
});

//倒序
mapDate=new TreeMap<String, String>(new Comparator<String>() {

@Override
public int compare(String lhs, String rhs) {
// TODO Auto-generated method stub
return rhs.compareTo(lhs);
}
});

List<String> mSections=new mSections = new ArrayList<String>();
Collections.sort(mSections);