如何通过Java代码实现KMP算法

import java.util.Arrays; public class Test {   /**   * @param str 文本串   * @param dest 模式串   * @param next 匹配核心数组   * @return   */  public static int kmp(String str, String dest,int[] next) {    for(int i = 0, j = 0; i < str.length(); i++){      if (j > 0 && str.charAt(i) != dest.charAt(j)) {        j = next[j - 1];      }      if (str.charAt(i) == dest.charAt(j)) {        j++;      }      if (j == dest.length()) {        return i-j+1;      }    }    return 0;  }   public static int[] kmpnext(String dest) {    int[] next = new int[dest.length()];    next[0] = 0;    for(int i = 1,j = 0; i < dest.length(); i++) {      if (j > 0 && dest.charAt(j) != dest.charAt(i)) {        j = next[j - 1];      }      if (dest.charAt(i) == dest.charAt(j)) {        j++;      }      next[i] = j;    }    return next;  }   public static void main(String[] args){    String a = "ABABAE";    String b = "ABABABABAEBEABADAEABAEABABAE";    int[] next = kmpnext(a);    System.out.println(Arrays.toString(next));    int res = kmp(b, a,next);    System.out.println(res);  } }