回答編集履歴

2 .

gingertail score 273

2018/05/14 13:38  投稿

```java

private static boolean check(String str) {

private static boolean checkDouble(String str) {

/*double dummy =*/ Double.parseDouble(str);

return true;

} catch (NumberFormatException e) {

return false;

}

```

1 .

gingertail score 273

2018/05/14 13:09  投稿

```java

private static boolean check(String str) {

double dummy = Double.parseDouble(str);

/*double dummy =*/ Double.parseDouble(str);

return true;

} catch (NumberFormatException e) {

return false;

}

```