最长公共连续子串

import java.util.Scanner;

/**
 * @author Administrator
 *
 */
public class Main {
    static String str1;
    static String str2;
    static int[][] dp;
    static int Max;

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        str1 = in.nextLine();
        str2 = in.nextLine();
        int len1 = str1.length();
        int len2 = str2.length();
        if ( len1 < 1 || len2 < 1){
            System.out.print(0);
        }

        dp = new int[str1.length()+1][str2.length()+1];
        char[] ch1 = str1.toCharArray();
        char[] ch2 = str2.toCharArray();

        for ( int i = 0 ; i < len1 ; i++){
            if ( ch1[i] == ch2[0]){
                dp[i][0] = 1;
            }
        }

        for ( int i = 0 ; i < len2 ; i++){
            if ( ch2[i] == ch1[0]){
                dp[0][i] = 1;
            }
        }

        Max = dp[0][0];
        for ( int i = 1 ; i < len1 ; i++){
            for ( int j = 1 ; j < len2 ; j++){
                if ( ch1[i] == ch2[j]){
                    dp[i][j] = dp[i-1][j-1]+1;
                }
                if ( dp[i][j] > Max){
                    Max = dp[i][j];
                }
            }
        }


        System.out.print(Max);
        in.close();
    }
}