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package j2se;
import java.util.*;
public class test2 {
public static void main(String[] args) {
// TODO Auto-generated method stub
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);
List<Integer> list = Arrays.asList(16, 17, 18, 19, 20);
list.set(1, 99);
list.add(21);
}
}
List<Integer> list=Arrays.asList(16,17,18,19,20);
System.out.println(list.getClass());
//out
class java.util.Arrays$ArrayList
java.util.Arrays$ArrayList并非 java.util.ArrayList