最长公共子串问题--动态规划

/**
     * @Date: 2020-03-30
     * @Description: 最长公共子串问题
     */
    public static void longestCommonSubstring(char[] A, char[] B) {
        int n = A.length;
        int m = B.length;
        int[][] C = new int[n + 1][m + 1];
        int lMax = 0, pMax = 0;
        //初始化
        for (int i = 0; i <= n; i++) {
            C[i][0] = 0;
        }
        for (int i = 0; i <= m; i++) {
            C[0][i] = 0;
        }
        for (int i = 1; i < n; i++) {
            for (int j = 1; j < m; j++) {
                if (A[i] != B[j]) {
                    C[i][j] = 0;
                } else {
                    C[i][j] = C[i - 1][j - 1] + 1;
                    if (C[i][j] > lMax) {
                        lMax = C[i][j];
                        pMax = i;
                    }
                }
            }
        }
        printSubstringRec(A, lMax, pMax);
    }

    public static void printSubstringRec(char[] A, int lMax, int pMax) {
        if (lMax == 0) {
            return;
        }
        for (int i = pMax - lMax + 1; i <= pMax; i++) {
            System.out.println(A[i]);
        }
    }