{"id":25552,"date":"2024-10-26T13:50:52","date_gmt":"2024-10-26T13:50:52","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=25552"},"modified":"2024-11-26T08:01:23","modified_gmt":"2024-11-26T08:01:23","slug":"%ed%94%8c%eb%9f%ac%ed%84%b0-%ea%b0%95%ec%a2%8c-14-5-try-catch-%eb%b8%94%eb%a1%9d","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/25552\/","title":{"rendered":"\ud50c\ub7ec\ud130 \uac15\uc88c: 14.5 try\/catch \ube14\ub85d"},"content":{"rendered":"

<\/p>\n

\ucef4\ud4e8\ud130 \ud504\ub85c\uadf8\ub798\ubc0d\uc5d0\uc11c \uc624\ub958 \ucc98\ub9ac\ub294 \uc911\uc694\ud55c \ubd80\ubd84\uc785\ub2c8\ub2e4. \uc774\ub294 \ud504\ub85c\uadf8\ub7a8\uc758 \uc548\uc815\uc131\uacfc \uc2e0\ub8b0\uc131\uc744 \ub192\uc5ec\uc8fc\uba70, \uc0ac\uc6a9\uc790\uac00 \uc608\uae30\uce58 \ubabb\ud55c \uc0c1\ud669\uc5d0\uc11c\ub3c4 \uc6d0\ud65c\ud558\uac8c \ud504\ub85c\uadf8\ub7a8\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \ub3c4\uc640\uc90d\ub2c8\ub2e4. Flutter\uc5d0\uc11c \uc624\ub958 \ucc98\ub9ac\ub97c \uc704\ud55c \uc911\uc694\ud55c \uae30\ub2a5\uc774 \ubc14\ub85c try\/catch \ube14\ub85d<\/strong>\uc785\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\uc5d0\uc11c\ub294 Flutter\uc5d0\uc11c try\/catch \ube14\ub85d\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

1. \uc624\ub958 \ucc98\ub9ac\uc758 \uc911\uc694\uc131<\/h2>\n

\uc624\ub958 \ucc98\ub9ac\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc2e4\ud589\ub418\ub294 \ub3d9\uc548 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc5ec\ub7ec \uac00\uc9c0 \uc608\uc678\uc801 \uc0c1\ud669\uc744 \uad00\ub9ac\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub124\ud2b8\uc6cc\ud06c \uc694\uccad\uc774 \uc2e4\ud328\ud558\uac70\ub098 \uc0ac\uc6a9\uc790\uc758 \uc785\ub825\uc774 \uc798\ubabb\ub41c \uacbd\uc6b0 \ub4f1\uc758 \uc0c1\ud669\uc5d0\uc11c \ud504\ub85c\uadf8\ub7a8\uc774 \ube44\uc815\uc0c1\uc801\uc73c\ub85c \uc885\ub8cc\ub418\uc9c0 \uc54a\ub3c4\ub85d \ud558\uae30 \uc704\ud574 \uc624\ub958 \ucc98\ub9ac\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. Flutter\ub294 \uc774\ub7ec\ud55c \uc624\ub958 \ucc98\ub9ac \uba54\ucee4\ub2c8\uc998\uc744 \uc81c\uacf5\ud558\uc5ec \uac1c\ubc1c\uc790\uac00 \ub354\uc6b1 \uc548\uc815\uc801\uc778 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ub9cc\ub4e4 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\n

2. try\/catch \ube14\ub85d\uc758 \uae30\ubcf8 \uad6c\uc870<\/h2>\n

try\/catch \ube14\ub85d\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uad6c\uc870\ub97c \uac00\uc9d1\ub2c8\ub2e4:<\/p>\n

\n    \n    try {\n        \/\/ \uc608\uc0c1\ub418\ub294 \uc624\ub958\uac00 \ubc1c\uc0dd\ud560 \uac00\ub2a5\uc131\uc774 \uc788\ub294 \ucf54\ub4dc\n    } catch (e) {\n        \/\/ \uc624\ub958\uac00 \ubc1c\uc0dd\ud588\uc744 \ub54c \uc2e4\ud589\ub418\ub294 \ucf54\ub4dc\n    }\n    <\/code>\n    <\/pre>\n
\uc704\uc758 \uad6c\uc870\uc5d0\uc11c try<\/strong> \ube14\ub85d \ub0b4\uc758 \ucf54\ub4dc\ub294 \uc815\uc0c1\uc801\uc73c\ub85c \uc2e4\ud589\ub429\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub9cc\uc57d \uc774 \ucf54\ub4dc\uc5d0\uc11c \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uba74, \ud574\ub2f9 \uc624\ub958\ub294 catch<\/strong> \ube14\ub85d\uc5d0\uc11c \uc7a1\ud788\uac8c \ub429\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud504\ub85c\uadf8\ub7a8\uc774 \ube44\uc815\uc0c1\uc801\uc73c\ub85c \uc885\ub8cc\ub418\uc9c0 \uc54a\uace0, \uc0ac\uc6a9\uc790\uc5d0\uac8c \uc801\uc808\ud55c \uc624\ub958 \uba54\uc2dc\uc9c0\ub97c \ubcf4\uc5ec\uc904 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
3. \uc608\uc81c: \uae30\ubcf8\uc801\uc778 try\/catch \uc0ac\uc6a9<\/h2>\n
\uc544\ub798\ub294 Flutter\uc5d0\uc11c try\/catch \ube14\ub85d\uc744 \uc0ac\uc6a9\ud558\ub294 \uac04\ub2e8\ud55c \uc608\uc81c\uc785\ub2c8\ub2e4. \uc774 \uc608\uc81c\uc5d0\uc11c\ub294 \uc0ac\uc6a9\uc790\uac00 \uc785\ub825\ud55c \uc22b\uc790\ub97c 0\uc73c\ub85c \ub098\ub204\ub294 \uc0c1\ud669\uc744 \uac00\uc815\ud569\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc774\ub294 \uc624\ub958\ub97c \ubc1c\uc0dd\uc2dc\ud0a4\uba70, \uc774\ub97c try\/catch\ub85c \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\n    \n    void divideNumbers(int a, int b) {\n        try {\n            var result = a ~\/ b; \/\/ \uc815\uc218 \ub098\ub217\uc148\n            print(\"\uacb0\uacfc: $result\");\n        } catch (e) {\n            print(\"\uc624\ub958 \ubc1c\uc0dd: $e\");\n        }\n    }\n    <\/code>\n    <\/pre>\n
\uc704\uc758 \ucf54\ub4dc\uc5d0\uc11c \uc0ac\uc6a9\uc790\uac00 0\uc744 \uc785\ub825\ud558\uba74, ~\/<\/strong> \uc5f0\uc0b0\uc790\uac00 \uc2e4\ud589\ub418\ub294 \uacfc\uc815\uc5d0\uc11c \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uac8c \ub418\uace0, \uc774\ub294 catch \ube14\ub85d\uc5d0\uc11c \ucc98\ub9ac\ub429\ub2c8\ub2e4.<\/p>\n
4. \ud2b9\uc815 \uc624\ub958 \ucc98\ub9ac\ud558\uae30<\/h2>\n
catch \ube14\ub85d\uc5d0\uc11c \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc624\ub958\ub294 \uc5ec\ub7ec \uc885\ub958\uc785\ub2c8\ub2e4. Flutter\uc5d0\uc11c\ub294 \uc774\ub7ec\ud55c \uc624\ub958\ub97c \ud2b9\uc815\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, FormatException<\/strong>\uc774\ub098 IntegerDivisionByZeroException<\/strong>\uacfc \uac19\uc740 \ud2b9\uc815 \uc624\ub958\ub97c \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\n    \n    void divideNumbers(int a, int b) {\n        try {\n            var result = a ~\/ b;\n            print(\"\uacb0\uacfc: $result\");\n        } catch (e) {\n            if (e is IntegerDivisionByZeroException) {\n                print(\"\uc624\ub958: 0\uc73c\ub85c \ub098\ub20c \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.\");\n            } else {\n                print(\"\uc624\ub958 \ubc1c\uc0dd: $e\");\n            }\n        }\n    }\n    <\/code>\n    <\/pre>\n
\uc704 \ucf54\ub4dc\ub294 0\uc73c\ub85c \ub098\ub204\ub824 \ud560 \ub54c \ubc1c\uc0dd\ud558\ub294 \uc624\ub958\uc5d0 \ub300\ud574 \uc0ac\uc6a9\uc790\uc5d0\uac8c \ub354 \uba85\ud655\ud55c \uc815\ubcf4\ub97c \uc81c\uacf5\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4.<\/p>\n
5. \ube44\ub3d9\uae30 \ucf54\ub4dc\uc5d0\uc11c\uc758 try\/catch \uc0ac\uc6a9<\/h2>\n
Flutter\uc5d0\uc11c\ub294 \ube44\ub3d9\uae30 \ucf54\ub4dc\uc5d0\uc11c \ub610\ud55c try\/catch \ube14\ub85d\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ube44\ub3d9\uae30 \ucf54\ub4dc\uc5d0\uc11c \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\ub294 \uacbd\uc6b0, await \ud0a4\uc6cc\ub4dc\ub97c \uc0ac\uc6a9\ud560 \ub54c \uc624\ub958 \ucc98\ub9ac \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n
\n    \n    Future fetchData() async {\n        try {\n            var response = await http.get('https:\/\/api.example.com\/data');\n            \/\/ \ub370\uc774\ud130 \ucc98\ub9ac \ucf54\ub4dc\n        } catch (e) {\n            print(\"\ube44\ub3d9\uae30 \uc624\ub958 \ubc1c\uc0dd: $e\");\n        }\n    }\n    <\/void><\/code>\n    <\/pre>\n
\uc704\uc758 \ucf54\ub4dc\ub294 HTTP \uc694\uccad\uc744 \ud1b5\ud574 \ub370\uc774\ud130\ub97c fetch\ud558\ub294 \uacfc\uc815\uc5d0\uc11c \uc624\ub958\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uacbd\uc6b0\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n
6. \uc608\uc678 \ub358\uc9c0\uae30 (throw)<\/h2>\n
\uac1c\ubc1c\uc790\ub294 \ud2b9\uc815 \uc870\uac74\uc774 \ucda9\uc871\ub418\uc9c0 \uc54a\uc744 \ub54c \uc9c1\uc811 \uc608\uc678\ub97c \ub358\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub97c \uc704\ud574 throw<\/strong> \ud0a4\uc6cc\ub4dc\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790\uac00 \uc785\ub825\ud55c \ub370\uc774\ud130\uac00 \uc720\ud6a8\ud558\uc9c0 \uc54a\uc740 \uacbd\uc6b0 \uc0ac\uc6a9\uc790 \uc815\uc758 \uc608\uc678\ub97c \uc0dd\uc131\ud558\uc5ec \ub358\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
\n    \n    void validateInput(String input) {\n        if (input.isEmpty) {\n            throw FormatException(\"\uc785\ub825\uc774 \ube44\uc5b4 \uc788\uc2b5\ub2c8\ub2e4.\");\n        }\n    }\n    <\/code>\n    <\/pre>\n
\uc704\uc758 \ucf54\ub4dc\uc5d0\uc11c \uc720\ud6a8\uc131 \uac80\uc0ac\ub97c \ud1b5\ud574 \uc0ac\uc6a9\uc790 \uc785\ub825\uc774 \ube44\uc5b4\uc788\uc744 \uacbd\uc6b0 \uc9c1\uc811 \uc608\uc678\ub97c \ub358\uc9c0\ub294 \uc608\ub97c \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
7. \uc0ac\uc6a9\uc790 \uc815\uc758 \uc608\uc678 \ud074\ub798\uc2a4<\/h2>\n
Flutter\uc5d0\uc11c\ub294 \uac1c\ubc1c\uc790\uac00 \uc0ac\uc6a9\uc790 \uc815\uc758 \uc608\uc678 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud558\uc5ec \ub354\uc6b1 \uc138\ubd80\uc801\uc778 \uc624\ub958 \ucc98\ub9ac\ub97c \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc544\ub798\ub294 \uc0ac\uc6a9\uc790 \uc815\uc758 \uc608\uc678 \ud074\ub798\uc2a4\uc758 \uc608\uc785\ub2c8\ub2e4:<\/p>\n
\n    \n    class CustomException implements Exception {\n        String cause;\n        CustomException(this.cause);\n    }\n\n    void performOperation() {\n        throw CustomException(\"\uc0ac\uc6a9\uc790 \uc815\uc758 \uc608\uc678 \ubc1c\uc0dd\");\n    }\n    <\/code>\n    <\/pre>\n
\uc704\uc758 \uc608\uc2dc\ucc98\ub7fc, CustomException<\/strong> \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud558\uc5ec \uc774\ub97c \ud65c\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc801\uc808\ud788 catch \ubb38\uc5d0\uc11c \uc774 \uc608\uc678\ub97c \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
8. \uacb0\ub860<\/h2>\n
Flutter\uc5d0\uc11c try\/catch \ube14\ub85d\uc740 \uc624\ub958 \ucc98\ub9ac\ub97c \uc704\ud55c \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud504\ub85c\uadf8\ub7a8\uc758 \uc548\uc815\uc131\uacfc \uc0ac\uc6a9\uc790 \uacbd\ud5d8\uc744 \uadf9\ub300\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc778 \uc0ac\uc6a9\ubc95\ubd80\ud130 \ube44\ub3d9\uae30 \ucc98\ub9ac, \uc0ac\uc6a9\uc790 \uc815\uc758 \uc608\uc678\uae4c\uc9c0 \ub2e4\uc591\ud55c \uc0c1\ud669\uc5d0 \uc801\uc6a9\ud560 \uc218 \uc788\ub294 \uc624\ub958 \ucc98\ub9ac \uba54\ucee4\ub2c8\uc998\uc744 \ud559\uc2b5\ud574\ubcf4\uc168\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4. \uc55e\uc73c\ub85c\uc758 Flutter \uac1c\ubc1c\uc5d0 \ub3c4\uc6c0\uc774 \ub418\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n
9. \ucc38\uace0 \uc790\ub8cc<\/h2>\n