Java获取两个字符串中最大相同子串的方法

class StringTest3
{
	public static String getMaxSubString(String s1,String s2)
	{
		String max = "",min = "";
		max = (s1.length()>s2.length())?s1: s2;
		min = (max==s1)?s2: s1;		
//		sop("max="+max+"...min="+min);
		for(int x=0; x<min.length(); x++)
		{
			for(int y=0,z=min.length()-x; z!=min.length()+1; y++,z++)
			{
				String temp = min.substring(y,z);				
				sop(temp);
				if(max.contains(temp))//if(s1.indexOf(temp)!=-1)
					return temp;
			}
		}
		return "";
	}
	public static void main(String[] args) 
	{
		String s1 = "ab";
		String s2 = "cvhellobnm";
		sop(getMaxSubString(s2,s1));
	}
	public static void sop(String str)
	{
		System.out.println(str);
	}
}