Java String split()
The java string split() metoda rozdělí tento řetězec proti danému regulárnímu výrazu a vrátí pole char.
Interní implementace
public String[] split(String regex, int limit) { /* fastpath if the regex is a (1)one-char String and this character is not one of the RegEx's meta characters '.$|()[{^?*+\', or (2)two-char String and the first char is the backslash and the second is not the ascii digit or ascii letter. */ char ch = 0; if (((regex.value.length == 1 && '.$|()[{^?*+\'.indexOf(ch = regex.charAt(0)) == -1) || (regex.length() == 2 && regex.charAt(0) == '\' && (((ch = regex.charAt(1))-'0')|('9'-ch)) <0 0 && ((ch-'a')|('z'-ch)) < 0)) (ch character.max_low_surrogate)) { int off="0;" next="0;" boolean limited="limit"> 0; ArrayList list = new ArrayList(); while ((next = indexOf(ch, off)) != -1) { if (!limited || list.size() <limit 0 - 1) { list.add(substring(off, next)); off="next" + 1; } else last one assert (list.size()="=" limit 1); value.length)); break; if no match was found, return this (off="=" 0) new string[]{this}; add remaining segment (!limited || list.size() && list.get(resultsize 1).length()="=" resultsize--; string[] result="new" string[resultsize]; list.sublist(0, resultsize).toarray(result); pattern.compile(regex).split(this, limit); < pre> <hr> <h3>Signature</h3> <p>There are two signature for split() method in java string.</p> <pre> public String split(String regex) and, public String split(String regex, int limit) </pre> <hr> <h3>Parameter</h3> <p> <b>regex</b> : regular expression to be applied on string.</p> <p> <b>limit</b> : limit for the number of strings in array. If it is zero, it will returns all the strings matching regex.</p> <hr> <h3>Returns</h3> <p>array of strings</p> <hr> <h3>Throws</h3> <p> <b>PatternSyntaxException</b> if pattern for regular expression is invalid</p> <hr> <h3>Since</h3> <p>1.4</p> <hr> <h2>Java String split() method example</h2> <p>The given example returns total number of words in a string excluding space only. It also includes special characters.</p> <pre> public class SplitExample{ public static void main(String args[]){ String s1='java string split method by javatpoint'; String[] words=s1.split('\s');//splits the string based on whitespace //using java foreach loop to print elements of string array for(String w:words){ System.out.println(w); } }} </pre> <span> Test it Now </span> <pre> java string split method by javatpoint </pre> <hr> <h2>Java String split() method with regex and length example</h2> <pre> public class SplitExample2{ public static void main(String args[]){ String s1='welcome to split world'; System.out.println('returning words:'); for(String w:s1.split('\s',0)){ System.out.println(w); } System.out.println('returning words:'); for(String w:s1.split('\s',1)){ System.out.println(w); } System.out.println('returning words:'); for(String w:s1.split('\s',2)){ System.out.println(w); } }} </pre> <span> Test it Now </span> <pre> returning words: welcome to split world returning words: welcome to split world returning words: welcome to split world </pre> <h2>Java String split() method with regex and length example 2</h2> <p>Here, we are passing split limit as a second argument to this function. This limits the number of splitted strings.</p> <pre> public class SplitExample3 { public static void main(String[] args) { String str = 'Javatpointtt'; System.out.println('Returning words:'); String[] arr = str.split('t', 0); for (String w : arr) { System.out.println(w); } System.out.println('Split array length: '+arr.length); } } </pre> <pre> Returning words: Java poin Split array length: 2 </pre></limit></0> Parametr
regulární výraz : regulární výraz, který má být aplikován na řetězec.
omezit : limit pro počet řetězců v poli. Pokud je nula, vrátí všechny řetězce odpovídající regulárnímu výrazu.
Návraty
pole řetězců
hází
PatternSyntaxException pokud je vzor regulárního výrazu neplatný
Od té doby
1.4
Příklad metody Java String split().
Uvedený příklad vrátí celkový počet slov v řetězci bez pouze mezery. Obsahuje také speciální znaky.
public class SplitExample{ public static void main(String args[]){ String s1='java string split method by javatpoint'; String[] words=s1.split('\s');//splits the string based on whitespace //using java foreach loop to print elements of string array for(String w:words){ System.out.println(w); } }} Otestujte to hned java string split method by javatpoint
Metoda Java String split() s příkladem regulárního výrazu a délky
public class SplitExample2{ public static void main(String args[]){ String s1='welcome to split world'; System.out.println('returning words:'); for(String w:s1.split('\s',0)){ System.out.println(w); } System.out.println('returning words:'); for(String w:s1.split('\s',1)){ System.out.println(w); } System.out.println('returning words:'); for(String w:s1.split('\s',2)){ System.out.println(w); } }} Otestujte to hned returning words: welcome to split world returning words: welcome to split world returning words: welcome to split world
Metoda Java String split() s regulárním výrazem a délkou příklad 2
Zde předáváme split limit jako druhý argument této funkci. To omezuje počet rozdělených řetězců.
public class SplitExample3 { public static void main(String[] args) { String str = 'Javatpointtt'; System.out.println('Returning words:'); String[] arr = str.split('t', 0); for (String w : arr) { System.out.println(w); } System.out.println('Split array length: '+arr.length); } } Returning words: Java poin Split array length: 2
