Write a function to find the longest common prefix string amongst an array of strings.
代码语言:javascript复制 public String longestCommonPrefix(String[] strs) {
if (strs == null || strs.length == 0) {
return "";
}
if (strs.length == 1) {
return strs[0];
}
String string = strs[0];
for (int i = 0; i < string.length(); i ) {
for (int j = 1; j < strs.length; j ) {
if (!(i < strs[j].length() && string.charAt(i) == strs[j]
.charAt(i))) {
return string.substring(0, i);
}
}
}
return string;
}