printingcontainers.java

来自「java编程思想的部分实现」· Java 代码 · 共 25 行

//:c09:PrintingContainers.java
import java.util.*;
public class PrintingContainers
{
	static Collection fill(Collection c)
	{
		c.add("dog");
		c.add("dog");
		c.add("cat");
		return c;
	}
	static Map fill(Map m)
	{
		m.put("dog1","Bosco");
		m.put("dog","Spot");
		m.put("cat","Rags");
		return m;
	}
	public static void main(String[] args)
	{
		System.out.println(fill(new ArrayList()));
		System.out.println(fill(new HashSet()));
		System.out.println(fill(new HashMap()));
	}
}