java基础-找出两个字符串相同的最大子串

import java.lang.String;

public class MaxSubString
{
public static void main(String[] args)
{
String s1="abjdfhelloshdf";
String s2="fhellods";
sop(getMaxSubString(s1,s2));
}
private static void sop(String s)
{
System.out.println(s);
}
private static String getMaxSubString(String s1,String s2)
{
//最大相同子串，s1,s2=min
String max=(s1.length()>s2.length())?s1:s2;
String min=(max==s1)?s2:s1;
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);
if(max.contains(temp))
return temp;
}
}

return "";
}
}