Limiting the number of characters in a string, and chopping off the rest

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I need to create a summary table at the end of a log with some values that are obtained inside a class. The table needs to be printed in fixed-width format. I have the code to do this already, but I need to limit Strings, doubles and ints to a fixed-width size that is hard-coded in the code.

So, suppose I want to print a fixed-width table with

    int,string,double,string
    int,string,double,string
    int,string,double,string
    int,string,double,string

    and the fixed widths are: 4, 5, 6, 6.

If a value exceeds this width, the last characters need to be cut off. So for example:

    124891, difference, 22.348, montreal

the strings that need to be printed ought to be:

    1248 diffe 22.348 montre

I am thinking I need to do something in the constructor that forces a string not to exceed a certain number of characters. I will probably cast the doubles and ints to a string, so I can enforce the maximum width requirements.

I don't know which method does this or if a string can be instantiated to behave taht way. Using the formatter only helps with the fixed-with formatting for printing the string, but it does not actually chop characters that exceed the maximum length.


Use this to cut off the non needed characters:

String.substring(0, maxLength); 

Example:

String aString ="123456789";
String cutString = aString.substring(0, 4);
// Output is: "1234" 

To ensure you are not getting an IndexOutOfBoundsException when the input string is less than the expected length do the following instead:

int maxLength = (inputString.length() < MAX_CHAR)?inputString.length():MAX_CHAR;
inputString = inputString.substring(0, maxLength);

If you want your integers and doubles to have a certain length then I suggest you use NumberFormat to format your numbers instead of cutting off their string representation.

Truncate a string in JavaScript - Dylan Attal, In this challenge we'll be cutting a string short. we want our output to be str truncated — meaning cut off — after num characters with “… Removes a specified number of characters from a specified index position in a string. Trim You can easily remove white spaces from both ends of a string by using the String.Trim method, as shown in the following example.


You can also use String.format("%3.3s", "abcdefgh"). The first digit is the minimum length (the string will be left padded if it's shorter), the second digit is the maxiumum length and the string will be truncated if it's longer. So

System.out.printf("'%3.3s' '%3.3s'", "abcdefgh", "a");

will produce

'abc' '  a'

(you can remove quotes, obviously).

Essentials of MATLAB Programming, [token,remainder] = strtok(string,delim) where string is the input character string, delim is the (optional) set of dedelimdelim -limiting characters, token is the rst set while (any(remainder)) [chopped,remainder] = strtok(remainder); all_words There are two functions that trim leading and/or trailing whitespace from a string. Each field in your company data file has a maximum number of characters that can be entered. Here's the maximum number of characters you can enter in each field. 1 Item name may contain special characters but it is recommended that the first character not be a special character.2 While the Memo field can contain 4095 characters, only 30-60


For readability, I prefer this:

if (inputString.length() > maxLength) {
    inputString = inputString.substring(0, maxLength);
}

over the accepted answer.

int maxLength = (inputString.length() < MAX_CHAR)?inputString.length():MAX_CHAR;
inputString = inputString.substring(0, maxLength);

Secure Development for Mobile Apps: How to Design and Code Secure , The string is to be stored in the database, queried from the database, and Our database column has a limit of 25 characters for the username. alpha-numeric. if(ctype_alnum($userName))//only allow letters and numbers ENT_QUOTES, "​UTF-8"));//safe for HTML In step one, we cut our string to fit our database column. int,string,double,string int,string,double,string int,string,double,string int,string,double,string and the fixed widths are: 4, 5, 6, 6. If a value exceeds this width, the last characters need to be cut off. So for example: 124891, difference, 22.348, montreal.


You can use the Apache Commons StringUtils.substring(String str, int start, int end) static method, which is also null safe.

See: http://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#substring%28java.lang.String,%20int,%20int%29

and http://commons.apache.org/proper/commons-lang/javadocs/api-2.6/src-html/org/apache/commons/lang/StringUtils.html#line.1961

substr - Manual, If start is negative, the returned string will start at the start 'th character from the end of $rest = substr("abcdef", 4, -4); // returns false function substr_entities($​text,$start,$limit=0) Just a little function to cut a string by the wanted amount. To remove the last n characters from a text string, you can use a formula based on the LEFT and LEN functions. You can use a formula like this to strip the last 3 characters, last 5 characters of a value, starting on the left. Which trims " miles" from each value returning just the number. The LEFT function is perfect for extracting characters


You can achieve this easily using

    shortString = longString.substring(0, Math.min(s.length(), MAX_LENGTH));

Strings · The Julia Language, Conversion via codepoint(char) will not reveal this encoding because it always returns The number of characters in string s from indices i through j . limit=1) 1-element Array{SubString{String},1}: "M.a.r.c.h" julia> rsplit(a,". if n is so large that applying nextind would reach ncodeunits(str)+1 then each remaining iteration  To split a text string at a certain character, you can use a combination of the LEFT, RIGHT, LEN, and FIND functions. And the formula in D5 is: The first formula uses the FIND function to locate the underscore (_) in the text, then we subtract 1 to move back to the "character before the special character". In this example , FIND returns 7, so


Cut A String To A Specified Length With PHP, The substr() function has three parameters. The first is the string, the second is where to start cutting from and the third is the amount of characters  Accessing characters in strings by index in Python. Typically it's more useful to access the individual characters of a string by using Python's array-like indexing syntax. Here, as with all sequences, it's important to remember that indexing is zero-based; that is, the first item in the sequence is number 0.


Class: String (Ruby 2.6), This may improve performance, when the string will be concatenated many is the basis for the methods < , <= , > , >= , and between? , included from Modifies str by converting the first character to uppercase and the remainder to lowercase. Processes str as for String#chop , returning str, or nil if str is the empty string. Hi! I'm playing with entry again and trying to restrict length of entry widget to certain number of character, so users cannot enter more character into it.


JavaScript String substring() Method, The substring() method extracts the characters from a string, between two specified indices, Begin the extraction at position 2, and extract the rest of the string:.