IL suddivisione della stringa Java() Il metodo divide questa stringa in base a una determinata espressione regolare e restituisce un array di caratteri.
Implementazione interna
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> Parametro
espressione regolare : espressione regolare da applicare sulla stringa.
limite : limite per il numero di stringhe nell'array. Se è zero, restituirà tutte le stringhe corrispondenti alla regex.
ritorna
serie di stringhe
Lancia
PatternSyntaxException se il modello per l'espressione regolare non è valido
Da
1.4
Esempio del metodo Java String split()
L'esempio fornito restituisce il numero totale di parole in una stringa escluso solo lo spazio. Include anche caratteri speciali.
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); } }} Provalo adesso java string split method by javatpoint
Metodo Java String split() con regex e esempio di lunghezza
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); } }} Provalo adesso returning words: welcome to split world returning words: welcome to split world returning words: welcome to split world
Metodo Java String split() con regex e lunghezza esempio 2
Qui stiamo passando il limite diviso come secondo argomento di questa funzione. Ciò limita il numero di stringhe divise.
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