两个字符串的最大相同子串

public class TestsonString {  2     public static void main(String[] args) {  3         String s1 = "asdfkljasdCCTVCCTVfioejsdfunbsdfhh";  4         String s2 = "asdfkasdiCCTVCCTVufasdfjh";  5  sonStringOperation(s1,s2);  6         
        System.out.println("\n================================================");  8         String s3 = "abcdefgdcba";
        String s4 = "asdabcdfkasdiCCTVCCTVufasdfdcbajh";10         sonStringOperation(s3,s4);11  } 12  private static void sonStringOperation(String s1,String s2) { 13 　　    if(s1 == null || s2 == null || s1.length() == 0 || s2.length() == 0)
    　     return;           15  String temp,s3; 16         if (s1.length() < s2.length()) {// 比较s1与s2长度，将较长的字符串赋给s1
            temp = s2; 18             s2 = s1; 19             s1 = temp; 20  } 21         int count = s2.length();// 将较短字符串的长度赋值给count
        int sum = (count + 1) * count / 2;// 计算得出所有可能结果的最大值sum
        String[] sonArray = new String[sum];// 分配sum个空间给sonArray数组
        int arrIndex = 0;// sonArray数组下标
        if (s1.contains(s2)) { 26             System.out.println("最大子字符串为" + s2); 27         } else if (!s1.contains(s2)) { 28             for (int i = 0; i < s2.length(); i++) { 29                 for (int j = s2.length(); j > i; j--) { 30                     s3 = s2.substring(i, j);// 将截取后的字符串赋值给s3
                    if (s1.contains(s3)) {// 如果s3为s1的子字符串，则将s3置入sonArray数组中
                        sonArray[arrIndex] = s3; 33                         arrIndex++; 34  } 35  } 36  } 37             if (sonArray[0] == null) {// 如果sonArray数组为空
                System.out.println("两个字符串之间没有相同的子字符串！"); 39                 return; 40  } 41             temp = sonArray[0]; 42             count = 0; 43             for (int i = 1; i < arrIndex; i++) { 44                 if (temp.length() < sonArray[i].length()) { 45                     temp = sonArray[i]; 46                     count = 1; 47                 }else if(temp.length() == sonArray[i].length()) { 48                     count++; 49  } 50  } 51             System.out.print("两个字符串的相同的最大子字符串为："); 52             for (int i = 0; i < arrIndex; i++) { 53                 if(temp.length()==sonArray[i].length()) 54                     System.out.print(sonArray[i]+" "); 55  } 56  } 57  } 58 }