Java 之容器学习（接上篇)

/**
*
* 再谈容器
* @author gao
*/
package com.gao.thinkinjava;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.TreeMap;
import java.util.TreeSet;

public class PrintingContainers {
static void Print(Object c){
System.out.println(c);
}
static Collection fill(Collection<String>collection){
collection.add("rat");
collection.add("cat");
collection.add("dog");
collection.add("dog");
return collection;
}
static Map fill(Map<String,String>map){
map.put("rat","Fuzzy");
map.put("cat", "Rags");
map.put("dog", "Bosco");
map.put("dog", "spot");
return map;
}
public static void main(String[]args){
Print(fill(new ArrayList<String>()));
Print(fill(new LinkedList<String>()));
Print(fill(new HashSet<String>()));
Print(fill(new TreeSet<String>()));
Print(fill(new LinkedHashSet<String>()));
Print(fill(new HashMap<String,String>()));
Print(fill(new TreeMap<String,String>()));
Print(fill(new LinkedHashMap<String,String>()));
}
}

输出结果：[rat, cat, dog, dog][rat, cat, dog, dog][cat, dog, rat][cat, dog, rat][rat, cat, dog]{cat=Rags, dog=spot, rat=Fuzzy}{cat=Rags, dog=spot, rat=Fuzzy}{rat=Fuzzy, cat=Rags, dog=spot}