so I have task to double number of letter “a” every time it occurs in a string. For example sentence “a cat walked on the road” , at the end must be “aa caaaat waaaaaaaalked on the roaaaaaaaaaaaaaaaa” . I had something like this on my mind but it doubles every charachter, n…
Tag: character
Replacing string for only one time in Java? [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question Saying that there are String A = “aabbccdd” and String B = “abcd”, is…
How to print sequence of characters according to the number next to it?
Input: a2b4c3 Output: aabbbbccc Here is my code………which has wrong output: Whats wrong in this code, I didn’t get the output as expected My output is: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccc…
Replacing the password character to dot in JPasswordField
The default password symbol of a JPasswordField is a dot. But this will be replaced by Java Look and Feel to an asterisk. Is there a way that I can replace this symbol to the dot back again after loading the Look and Feel ? I already know that initializing or creating the JFrame object before loading the Look…
Difference between 0x0A and 0x0D
I was studying about bluetooth and I was trying to write the code to keep listening to the input stream while connected and i came across this following code snippet: Can someone explain what is the difference between 0x0A and 0x0D. And also give a brief explanation about this code. Kindly share your views. A…
How to determine if a String has non-alphanumeric characters?
I need a method that can tell me if a String has non alphanumeric characters. For example if the String is “abcdef?” or “abcdefà”, the method must return true. Answer Using Apache Commons Lang: Alternativly iterate over String’s characters and check with: You’ve still one p…
How do I use a char as the case in a switch-case?
How do I use a character in a switch-case? I will be getting the first letter of whatever the user inputs. Answer
Java – Forward Slash Escape Character
Can anybody tell me how I use a forward slash escape character in Java. I know backward slash is but I’ve tried / and / / with no luck! Here is my code:- Thanks in advance! Answer You don’t need to escape forward slashes either in Java as a language or in regular expressions. Also note that
Creating Unicode character from its number
I want to display a Unicode character in Java. If I do this, it works just fine: String symbol = “u2202”; symbol is equal to “∂”. That’s what I want. The problem is that I know the Unicode …