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トップifに関する質問無限ループになってしまう　Java

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6

ソース修正

2019/10/10 01:29

投稿

cateye
cateye

スコア6851

test CHANGED
@@ -86,7 +86,7 @@
86
86
 
87
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  } else {
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- do {//while(true){
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+ while(!PassOK){
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91
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@@ -184,7 +184,7 @@
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  PassOK = true;
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- } while (!PassOK);
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+ }
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  }
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190
 

5

ソース追記

2019/10/10 01:29

投稿

cateye
cateye

スコア6851

test CHANGED
@@ -61,3 +61,135 @@
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  Process finished with exit code 0
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  ```
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+
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+ 「現状」
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+
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+ ```java
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+
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+ public static void main(String[] args) {
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+
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+ Scanner input = new Scanner(System.in);
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+
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+ boolean PassOK = false;
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+
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+ while (!PassOK) {
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+
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+ System.out.print("input password? ");
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+
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+ String pass = input.nextLine();
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+
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+ System.out.println("password:" + pass);
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+
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+ if (pass.equals("abc")) {
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+
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+ break;
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+
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+ } else {
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+
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+ do {//while(true){
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+
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+
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+
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+ int i;
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+
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+
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+
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+ if (pass.length() < 8) {
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+
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+ System.out.println(" Your password must be at least 8 characters.");
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+
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+ break;
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+
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+ }
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+
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+
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+
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+ for (i = 0; i < pass.length(); i++) {
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+
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+ if (Character.isUpperCase(pass.charAt(i))) {
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+
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+ break;
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+
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+ }
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+
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+ }
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+
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+ if (i == pass.length()) {
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+
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+ System.out.println(" Your password must contain at least one uppercase letter.");
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+
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+ break;
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+
123
+ }
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+
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+
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+
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+ for (i = 0; i < pass.length(); i++) {
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+
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+ if (Character.isLowerCase(pass.charAt(i))) {
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+
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+ break;
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+
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+ }
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+
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+ }
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+
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+ if (i == pass.length()) {
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+
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+ System.out.println(" Your password must contain at least one lowercase letter.");
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+
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+ break;
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+
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+ }
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+
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+
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+
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+ for (i = 0; i < pass.length(); i++) {
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+
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+ if (Character.isDigit(pass.charAt(i))) {
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+
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+ break;
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+
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+ }
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+
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+ }
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+
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+ if (i == pass.length()) {
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+
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+ System.out.println(" Your password must contain a numeber.");
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+
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+ break;
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+
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+ }
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+
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+
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+
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+ if (pass.contains("password")) {
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+
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+ System.out.println(" Your password cannot contain word 'password.'");
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+
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+ break;
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+
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+ }
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+
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+
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+
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+ if (pass.contains(" ")) {
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+
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+ System.out.println(" You password can only contain aplha numeric characters.");
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+
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+ break;
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+
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+ }
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+
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+ PassOK = true;
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+
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+ } while (!PassOK);
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+
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+ }
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+
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+ }
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+
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+ }
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+
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+ ```

4

ソース修正

2019/10/10 00:13

投稿

cateye
cateye

スコア6851

test CHANGED
@@ -28,33 +28,33 @@
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  Your password must be at least 8 characters.
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+ input password? abcd
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32
-
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- password:
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+ password:abcd
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  Your password must be at least 8 characters.
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37
- www
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+ input password? ABCDEFGHI
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+ password:ABCDEFGHI
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+
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+ Your password must contain at least one lowercase letter.
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+
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+ input password? abcdefg
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+
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- password:www
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+ password:abcdefg
40
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41
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  Your password must be at least 8 characters.
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48
 
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- wwwwwwwww
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+ input password? 12345678
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- password:wwwwwwwww
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+ password:12345678
46
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47
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  Your password must contain at least one uppercase letter.
48
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49
- anc
55
+ input password? abc123ABC
50
56
 
51
- password:anc
52
-
53
- Your password must be at least 8 characters.
54
-
55
- abc
56
-
57
- password:abc
57
+ password:abc123ABC
58
58
 
59
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60
60
 

3

ソース修正

2019/10/09 23:47

投稿

cateye
cateye

スコア6851

test CHANGED
@@ -20,9 +20,39 @@
20
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21
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  の処理は、一番外側のwhile()の内側にないとおかしいのでは？
22
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23
- ```java
23
+ ```text
24
24
 
25
- input password? abc
25
+ input password? 123
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+
27
+ password:123
28
+
29
+ Your password must be at least 8 characters.
30
+
31
+
32
+
33
+ password:
34
+
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+ Your password must be at least 8 characters.
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+
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+ www
38
+
39
+ password:www
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+
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+ Your password must be at least 8 characters.
42
+
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+ wwwwwwwww
44
+
45
+ password:wwwwwwwww
46
+
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+ Your password must contain at least one uppercase letter.
48
+
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+ anc
50
+
51
+ password:anc
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+
53
+ Your password must be at least 8 characters.
54
+
55
+ abc
26
56
 
27
57
  password:abc
28
58
 

2

加筆

2019/10/09 22:58

投稿

cateye
cateye

スコア6851

test CHANGED
@@ -19,3 +19,15 @@
19
19
  System.out.println("password:" + pass);
20
20
 
21
21
  の処理は、一番外側のwhile()の内側にないとおかしいのでは？
22
+
23
+ ```java
24
+
25
+ input password? abc
26
+
27
+ password:abc
28
+
29
+
30
+
31
+ Process finished with exit code 0
32
+
33
+ ```

1

追記

2019/10/09 22:49

投稿

cateye
cateye

スコア6851

test CHANGED
@@ -9,3 +9,13 @@
9
9
  →[【Java入門】文字列(String)を比較する方法(「==」と「equals」)
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10
 
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  ](https://www.sejuku.net/blog/14621)
12
+
13
+
14
+
15
+ 「追記」
16
+
17
+ String pass = input.nextLine();
18
+
19
+ System.out.println("password:" + pass);
20
+
21
+ の処理は、一番外側のwhile()の内側にないとおかしいのでは？