これは、セパレーターを使用しない別の実用的なソリューションですが、爆発した文字列の最後で文字列の長さを結合して、後で再爆発できるようにします。
public static void main(String[] args) throws Exception {
String imploded = implode("me", "and", "mrs.", "jones");
System.out.println(imploded);
String[] exploded = explode(imploded);
System.out.println(Arrays.asList(exploded));
}
public static String implode(String... strings) {
StringBuilder concat = new StringBuilder();
StringBuilder lengths = new StringBuilder();
int i = 0;
for (String string : strings) {
concat.append(string);
if (i > 0) {
lengths.append("|");
}
lengths.append(string.length());
i++;
}
return concat.toString() + "#" + lengths.toString();
}
public static String[] explode(String string) {
int last = string.lastIndexOf("#");
String toExplode = string.substring(0, last);
String[] lengths = string.substring(last + 1).split("\\|");
String[] strings = new String[lengths.length];
int i = 0;
for (String length : lengths) {
int l = Integer.valueOf(length);
strings[i] = toExplode.substring(0, l);
toExplode = toExplode.substring(l);
i++;
}
return strings;
}
版画:
meandmrs.jones#2|3|4|5
[me, and, mrs., jones]