[英]do-while loop doesn't seem to work (Java)
我想我找到了一種解決方案,可通過使用do-while循環來驗證用戶提交的字符串是否采用正確的格式,只要布爾變量具有假值,該循環便會執行,但是,在設置斷點后,看到它存在即使變量仍設置為false,也會循環執行。 這是代碼:
do {
if (isLegit(x)) {
try {
dayTime = sdf.parse(x);
} catch (Exception ex) {
System.out.println("an exception was caught. oupsie. the day is now set to today.");
}
verify = true;
} else {
System.out.println("the format was wrong. please try again");
x = in .nextLine();
verify = false;
}
} while (verify = false);
Boolean isLegit(String x) {
try {
if (Integer.parseInt(x.substring(0, 2)) > 0 && Integer.parseInt(x.substring(0, 2)) < 13) {
if (Integer.parseInt(x.substring(3, 5)) > 0 && Integer.parseInt(x.substring(3, 5)) < 32) {
if (Integer.parseInt(x.substring(6, 10)) > 1969 && Integer.parseInt(x.substring(6, 10)) < 2016) {
return true;
}
}
}
} catch (Exception ex) {
return false;
}
return true;
}
我該怎么辦?
問題在這里:
while(verify=false);
更改為:
while(!verify);
將while(verify=false)
更改為while(verify==false)
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