package Test01;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

public class Test01 {

	public static void main(String[] args){

		a();

		b();

		c();

	}

	@SuppressWarnings("unchecked")

	public static void a(){

		@SuppressWarnings("rawtypes")

		List list = new ArrayList();

		list.add(0);

		list.add(1);

		list.add(3);

		list.add(4);

		System.out.println(list);

		System.out.println(list.getClass());

	}

	public static void b(){

		Double []arr=new Double[]{1.0,2.0,3.0,null};

		@SuppressWarnings("rawtypes")

		List list = Arrays.asList(arr);

		System.out.println(list);

		System.out.println(list.getClass());

	}

	@SuppressWarnings("unchecked")

	public static void c(){

		Double []arr=new Double[]{1.0,2.0,3.0,null};

		@SuppressWarnings("rawtypes")

		List list = Arrays.asList(arr);

		@SuppressWarnings("rawtypes")

		ArrayList arrayList = new ArrayList();

		for (int i = 0; i < list.size(); i++) {

			arrayList.add(list.get(i));

		}

		System.out.println(arrayList);

		System.out.println(arrayList.getClass());

	}

}