You can use:
result = result.split("\n")[0];
You can use:
result = result.split("\n")[0];
Assuming you just want everything before \n (or any other literal string/char), you should use indexOf() with substring():
result = result.substring(0, result.indexOf('\n'));
If you want to extract the portion before a certain regular expression, you can use split():
result = result.split(regex, 2)[0];
String result = "34.1 -118.33\n<!--ABCDEFG-->";
System.out.println(result.substring(0, result.indexOf('\n')));
System.out.println(result.split("\n", 2)[0]);
34.1 -118.33 34.1 -118.33
(Obviously \n isn't a meaningful regular expression, I just used it to demonstrate that the second approach also works.)
What is the difference between trim() and strip() in Java?
How can I remove whitespace characters from within a string in Java?
How does the trim() method handle Unicode whitespace characters?
You can use .substring():
String s = "the text=text";
String s1 = s.substring(s.indexOf("=") + 1);
s1.trim();
then s1 contains everything after = in the original string.
s1.trim()
.trim() removes spaces before the first character (which isn't a whitespace, such as letters, numbers etc.) of a string (leading spaces) and also removes spaces after the last character (trailing spaces).
While there are many answers. Here is a regex example
String test = "eo21jüdjüqw=realString";
test = test.replaceAll(".+=", "");
System.out.println(test);
// prints realString
Explanation:
.+ matches any character (except for line terminators)
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
= matches the character = literally (case sensitive)
This is also a shady copy paste from https://regex101.com/ where you can try regex out.
Apache Commons has a great StringUtils class (org.apache.commons.lang.StringUtils). In StringUtils there is a strip(String, String) method that will do what you want.
I highly recommend using Apache Commons anyway, especially the Collections and Lang libraries.
This does what you want:
public static void main (String[] args) {
String a = "\\joe\\jill\\";
String b = a.replaceAll("\\\\$", "").replaceAll("^\\\\", "");
System.out.println(b);
}
The $ is used to remove the sequence in the end of string. The ^ is used to remove in the beggining.
As an alternative, you can use the syntax:
String b = a.replaceAll("\\\\$|^\\\\", "");
The | means "or".
In case you want to trim other chars, just adapt the regex:
String b = a.replaceAll("y$|^x", ""); // will remove all the y from the end and x from the beggining
You are doing it right. From the documentation:
Strings are constant; their values cannot be changed after they are created. String buffers support mutable strings. Because String objects are immutable they can be shared.
Also from the documentation:
trim
public String trim()
Returns a copy of the string, with leading and trailing whitespace omitted. If this String object represents an empty character sequence, or the first and last characters of character sequence represented by this String object both have codes greater than '\u0020' (the space character), then a reference to this String object is returned.
Otherwise, if there is no character with a code greater than '\u0020' in the string, then a new String object representing an empty string is created and returned.
Otherwise, let k be the index of the first character in the string whose code is greater than '\u0020', and let m be the index of the last character in the string whose code is greater than '\u0020'. A new String object is created, representing the substring of this string that begins with the character at index k and ends with the character at index m-that is, the result of this.substring(k, m+1).
This method may be used to trim whitespace (as defined above) from the beginning and end of a string.
Returns:
A copy of this string with leading and trailing white space removed, or this string if it has no leading or trailing white space.
As strings in Java are immutable objects, there is no way to execute trimming in-place. The only thing you can do to trim the string is create new trimmed version of your string and return it (and this is what the trim() method does).