How can I generate a String of a given size?
int someLimit = GlobalLimits.BULK_SIZE;
I want 3 Strings which satisfy the below conditions.
This is what I have tried so far.
private String getLowerRandomString(int upto){
StringBuilder sBuilder = new StringBuilder();
for (int i = 0; i < upto; i++){
sBuilder.append("A");
}
return sBuilder.toString();
}
The problem what I see is, if my limit = 10000, it still loop up-to 9999 which is unnecessary. Share if you know a better approach than this. Thank you.
FYI: I was writing a unit test for a simple helper method.
public boolean isBulk(String text){
int bulkLimit = ImportToolkit.getSizeLimit();
if (text != null && text.length() > bulkLimit){
return true;
}
return false;
}
So, I want to pass different sizes of strings as parameters to this method and want to assert whether it gives me expected results.
What about using apache commons? It has a RandomStringUtils class that provides exactly the functionality you're looking for, but in the end it loops too...
org.apache.commons.lang3.RandomStringUtils#randomAlphanumeric(int count)
From JavaDoc
Creates a random string whose length is the number of characters specified.
Characters will be chosen from the set of alpha-numeric characters.
Parameters:
count - the length of random string to create
Returns:
the random string
If it doesn't need to be random there is another, cheaper method in Stringutils:
org.apache.commons.lang3.StringUtils#repeat(char, int)
But in the end it too loops...
From JavaDoc
Returns padding using the specified delimiter repeated to a given length.
StringUtils.repeat('e', 0) = ""
StringUtils.repeat('e', 3) = "eee"
StringUtils.repeat('e', -2) = ""
Note: this method doesn't not support padding with Unicode Supplementary Characters as they require a pair of chars to be represented. If you are needing to support full I18N of your applications consider using repeat(String, int) instead.
Parameters:
ch - character to repeat
repeat - number of times to repeat char, negative treated as zero
Returns:
String with repeated character
See Also:
repeat(String, int)