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Java String split()

The java string split() metóda rozdelí tento reťazec podľa daného regulárneho výrazu a vráti pole znakov.


Interná implementácia

 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&apos;s meta characters &apos;.$|()[{^?*+\&apos;, or (2)two-char String and the first char is the backslash and the second is not the ascii digit or ascii letter. */ char ch = 0; if (((regex.value.length == 1 &amp;&amp; &apos;.$|()[{^?*+\&apos;.indexOf(ch = regex.charAt(0)) == -1) || (regex.length() == 2 &amp;&amp; regex.charAt(0) == &apos;\&apos; &amp;&amp; (((ch = regex.charAt(1))-&apos;0&apos;)|(&apos;9&apos;-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=&apos;java string split method by javatpoint&apos;; String[] words=s1.split(&apos;\s&apos;);//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=&apos;welcome to split world&apos;; System.out.println(&apos;returning words:&apos;); for(String w:s1.split(&apos;\s&apos;,0)){ System.out.println(w); } System.out.println(&apos;returning words:&apos;); for(String w:s1.split(&apos;\s&apos;,1)){ System.out.println(w); } System.out.println(&apos;returning words:&apos;); for(String w:s1.split(&apos;\s&apos;,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 = &apos;Javatpointtt&apos;; System.out.println(&apos;Returning words:&apos;); String[] arr = str.split(&apos;t&apos;, 0); for (String w : arr) { System.out.println(w); } System.out.println(&apos;Split array length: &apos;+arr.length); } } </pre> <pre> Returning words: Java poin Split array length: 2 </pre></limit></0>

Parameter

regulárny výraz : regulárny výraz, ktorý sa má použiť na reťazec.

limit : limit pre počet reťazcov v poli. Ak je nula, vráti všetky reťazce zodpovedajúce regulárnemu výrazu.


Návraty

pole reťazcov


hádže

PatternSyntaxException ak je vzor pre regulárny výraz neplatný


Od r

1.4


Príklad metódy Java String split().

Daný príklad vráti celkový počet slov v reťazci okrem medzery. Obsahuje aj špeciálne znaky.

 public class SplitExample{ public static void main(String args[]){ String s1=&apos;java string split method by javatpoint&apos;; String[] words=s1.split(&apos;\s&apos;);//splits the string based on whitespace //using java foreach loop to print elements of string array for(String w:words){ System.out.println(w); } }} 
Vyskúšajte to
 java string split method by javatpoint 

Metóda Java String split() s príkladom regulárneho výrazu a dĺžky

 public class SplitExample2{ public static void main(String args[]){ String s1=&apos;welcome to split world&apos;; System.out.println(&apos;returning words:&apos;); for(String w:s1.split(&apos;\s&apos;,0)){ System.out.println(w); } System.out.println(&apos;returning words:&apos;); for(String w:s1.split(&apos;\s&apos;,1)){ System.out.println(w); } System.out.println(&apos;returning words:&apos;); for(String w:s1.split(&apos;\s&apos;,2)){ System.out.println(w); } }} 
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 returning words: welcome to split world returning words: welcome to split world returning words: welcome to split world 

Metóda Java String split() s regulárnym výrazom a dĺžkou príklad 2

Tu odovzdávame split limit ako druhý argument tejto funkcie. To obmedzuje počet rozdelených reťazcov.

 public class SplitExample3 { public static void main(String[] args) { String str = &apos;Javatpointtt&apos;; System.out.println(&apos;Returning words:&apos;); String[] arr = str.split(&apos;t&apos;, 0); for (String w : arr) { System.out.println(w); } System.out.println(&apos;Split array length: &apos;+arr.length); } } 
 Returning words: Java poin Split array length: 2