printcontainers.java

这是Java思想的最高集萃

package chapter11;
import java.util.*;
public class PrintContainers {
	static Map fill(Map<String,String> map){
		map.put("rat","Fuzzy");
		map.put("cat","Rags");
		map.put("dog", "Bosco");
		map.put("dog", "Bosco");
		return map;
		
	}
	public static void main(String args[]){
		System.out.println(fill(new HashMap<String,String>()));
		/*
		 * 我们看，fill()方法的参数是一个Map类型的实例，
		 * 用此用new HashMap<String,String>()
		 */
		System.out.println(fill(new TreeMap<String,String>()));
		System.out.println(fill(new LinkedHashMap<String,String>()));
	}
}