Is there in the JDK or Jakarta Commons (or anywhere else) a method that can parse the output of Arrays.toString, at least for integer arrays?
int[] i = fromString(Arrays.toString(new int[] { 1, 2, 3} );
The short answer is "No". There is no simple way to re-import an Object from a String, since certain type information is lost in the toString() serialization.
Pretty easy to just do it yourself:
public class Test {
public static void main(String args[]){
int[] i = fromString(Arrays.toString(new int[] { 1, 2, 3} ));
}
private static int[] fromString(String string) {
String[] strings = string.replace("[", "").replace("]", "").split(", ");
int result[] = new int[strings.length];
for (int i = 0; i < result.length; i++) {
result[i] = Integer.parseInt(strings[i]);
}
return result;
}
}
A sample with fastjson, a JSON library:
String s = Arrays.toString(new int[] { 1, 2, 3 });
Integer[] result = ((JSONArray) JSONArray.parse(s)).toArray(new Integer[] {});
Another sample with guava:
String s = Arrays.toString(new int[] { 1, 2, 3 });
Iterable<String> i = Splitter.on(",")
.trimResults(CharMatcher.WHITESPACE.or(CharMatcher.anyOf("[]"))).split(s);
Integer[] result = FluentIterable.from(i).transform(Ints.stringConverter())
.toArray(Integer.class);
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