package com.mufeng.theeleventhchapter;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

public class AddingGroups {
	public static void main(String[] args) {
		Collection<Integer> collection = new ArrayList<Integer>(Arrays.asList(
				1, 2, 3, 4, 5));
		Integer[] moreInts = { 6, 7, 8, 9, 10 };
		collection.addAll(Arrays.asList(moreInts));
		Collections.addAll(collection, 11, 12, 13, 14, 15);
		Collections.addAll(collection, moreInts);

		for (Integer i : collection) {
			System.out.print(i + ", ");
		}
		
		System.out.println("\n-------------------我是分割线-------------------");

		List<Integer> list = Arrays.asList(16, 17, 18, 19, 20);
		list.set(1, 99);

		for (Integer i : list) {
			System.out.print(i + ", ");
		}
	}

}

输出结果

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 6, 7, 8, 9, 10, 
-------------------我是分割线-------------------
16, 99, 18, 19, 20, 

示例源码2

package com.mufeng.theeleventhchapter;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

class Snow {
}

class Powder extends Snow {
}

class Light extends Powder {
}

class Heavy extends Powder {
}

class Crusty extends Snow {
}

class Slush extends Snow {
}

public class AsListInference {
	public static void main(String[] args) {
		List<Snow> snow1 = Arrays.asList(new Crusty(), new Slush(),
				new Powder());
		// Type mismatch: cannot convert from List<Powder> to List<Snow>
		// List<Snow> snow2 = Arrays.asList(new Light(), new Heavy());

		List<Snow> snow3 = new ArrayList<Snow>();
		Collections.addAll(snow3, new Light(), new Heavy());

		// Give a hint using an explicit type argument specification
		List<Snow> snow4 = Arrays.<Snow> asList(new Light(), new Heavy());

	}

}