容器深入研究

package net.javabcsx.com.char17;

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

/**
 * Created by Administrator on 2016/4/14.
 */

class StringAddress{
    private String s;
    public StringAddress(String s) {
        this.s = s;
    }

    @Override
    public String toString() {
        return super.toString() + " " + s;
    }
}

public class FillingLists {
    public static void main(String[] args) {
        List<StringAddress> list = new ArrayList<StringAddress>(
                //nCopies将对象拷贝4遍
                Collections.nCopies(4, new StringAddress("Hello")));
        System.out.println(list);
        //复制同一个对象替换容器
        Collections.fill(list, new StringAddress("World"));
        System.out.println(list);
    }
}