Java Type Conversion

TypeConvert.java

//string 2 list
List<String> l=Arrays.asList(s.split(""));

// array 2 list(except 8 basic types),reference type
List<T> l=Arrays.asList(array);

//8 basic types arrays 2 list, such as Integer
List list=new ArrayList();
double array[]={12,223,234};
for(int i=0;i<array.length;i++){
  list.add(new Double(array[i]));
}

//list 2 array
int size =list.size();
String array[]=(String[])list.toArray(new String [size]);