JAVA 机试题
因为一道机试题，第一次机试就被刷了！当时没做出来，回来才想到怎么做！命途多舛啊！
求两字符串中的最大公共子字符串，并输出长度。例如"abbcgre","abcgra"中最大子字符串"bcgr"。
public class GetMax
{
/*采用二分法查找最大子字符串*/
static String s1 = "abbcgre";
static String s2 = "abcgra";
static int ruler = s2.length();
public static void main(String arg[])
{
ToCompare com = new ToCompare(s1,s2,ruler);
for(;ruler>0;ruler = ruler/2)
{
com.Setcur(ruler);
if(com.Compare())
{
break;
}
}
if(ruler>0)
{
for(;ruler<=s2.length();ruler++)
{
com.Setcur(ruler);
if(com.Compare())
{
if(ruler==s2.length())
{
System.out.println(ruler);
com.OutCompare();
break;
}
}
else
{
ruler--;
com.Setcur(ruler);
System.out.println(ruler);
com.OutCompare();
break;
}
}
}
else
{
System.out.println("没有匹配的字符串!");
}
}
}
public class ToCompare
{
static String t1;
static String t2;
static int cur;
static int i;
static int j;
static boolean temp = false;
public ToCompare(String a,String b,int c)
{
t1 = a;
t2 = b;
cur = c;
}
public int Setcur(int c)
{
cur = c;
return 0;
}
public boolean Compare() /*比较两字符串中是否有公共字符串
，有的话返回true，否则返回false*/
{
a :{ for(i=0;i<t1.length();i++)
for(j=0;j<t2.length();j++)
{
temp = t1.regionMatches(i,t2,j,cur);
if(temp)
{
break a;
}
}
}
return temp;
}
public boolean OutCompare() /*输出两字符串中指定长度的全
部公共字符串*/
{
a :{ for(i=0;i<t1.length();i++)
for(j=0;j<t2.length();j++)
{
temp = t1.regionMatches(i,t2,j,cur);
if(temp)
{
System.out.println
(t1.substring(i,i+cur));
}
}
}
return temp;
}
}