Tagged Questions

0
votes
0answers
11 views

setItemChecked in listview comparing to an arraylist

I create a listview from an arraylist; this arraylist contains a number of courses that a studen can take. I created a class User and I add the courses from an string[]. The problem is, I don't get ...
0
votes
1answer
18 views

Java String.replaceAll with different match & replace criteria

I have this code: String polynomial = "2x^2-4x+16"; String input = polynomial.replaceAll("[0-9a-zA-Z][-]", "+-"); The problem is I don't want to actually replace the [0-9a-zA-Z] char. Previously, ...
0
votes
0answers
81 views

Refactor a simple string compression (java) [on hold]

I am doing an exercise where I have to write a class to compress a string. Example: the string abcdddzee becomes abc3dz2e after compression. These are two classes (including the main). Is there a ...
1
vote
2answers
26 views

How do you display part of text field in italics in android?

I am developing an Android app which takes some data from text fields entered by the user, and outputs a single string in a new text field based on this data. Simple enough, however I need parts of ...
0
votes
5answers
41 views

remove substring in a string without using regex (cannot use replaceAll)

I need to remove some substrings in strings (in a large dataset). The substrings often contain special characters, like these: ., ^, /,... and replaceAll() would treat them as special characters for ...
-3
votes
2answers
23 views

Get String from command line → split string → if/else if statement returning else statement for no reason [duplicate]

(Sorry for the weird title, but I can't figure out what actually the problem is) The following code should get a String from the command line first (which works), then the input is being splitted ...
-1
votes
2answers
38 views

Java convert a string to “ISO-8859-15” encoding? [on hold]

This String must be XML compatible, that is for example a < character is converted to &#xD;
1
vote
4answers
50 views

Embed variables in a string

I want to use a variable in a string but I don't know how. Here is my code: private AbstractAction tester = new AbstractAction("test love match") { @Override public void ...
1
vote
4answers
54 views

Comparing String and Integer with equals

The output of the below code is false String str = "3456"; String str1 = "3456"; System.out.println(Integer.valueOf(str).equals(str1)); I didn't understand it. I thought it will return true. As I ...
-1
votes
2answers
42 views

Unable to switch on String type in JDK 7

I installed JDK 7 and using tomcat 7. I'm now getting this error when using switch on a String variable, Cannot switch on a value of type String for source level below 1.7 I also set my ...
0
votes
2answers
20 views

App ignores input after the Scanner.nextLine() method

I'm new to java and I decided to write a simple program to practice IFs. Here's what it should do: Ask the user about the currency. Ask the user about the amount of money he wants to transfer. ...
0
votes
3answers
34 views

Timestamp comes with .0 at the end

I'm trying to put in some time stamps in a AnnotatedTimeLine (Google Chart), and its req. to be in the Datetime format. When I reformat (to Timestamp format) the string that I receive from the class, ...
0
votes
3answers
41 views

Regex to validate alpahanumeric or a set of special characters

I have a requirement to ensure that the string has only alphanumeric or a set of characters like + ( ) , ' . - = I tried like String regex = "([a-zA-Z0-9]+)|([\\'|\\()|\\+|\\,|\\-|\\.|\\="]+)"; ...
1
vote
4answers
50 views

Losing precision while printing float

Please have a look at the below code: float num = 72000000.69f; System.out.println(String.format("%.2f", num)); Output: 72000000.00 I am loosing the precision. I have tried by converting ...
1
vote
3answers
52 views

Java: String formatting with placeholders

I am new to Java and am from Python. In Python we do string formatting like this: >>> x = 4 >>> y = 5 >>> print("{0} + {1} = {2}".format(x, y, x + y)) 4 + 5 = 9 ...

1 2 3 4 5 … 505
15 30 50 per page