IL sottolista() Il metodo dell'interfaccia elenco restituisce una vista della porzione di questo elenco compresa tra i parametri inclusivi ed esclusivi. Questo metodo elimina la necessità di operazioni di intervallo esplicite.
c# contiene una stringa
Sintassi
public List subList(int fromIndex, int toIndex)
Parametri
I parametri 'fromIndex' e 'toIndex' rappresentano il punto finale basso e alto della sottolista.
Ritorno
Il metodo subList() restituisce una visualizzazione dell'intervallo specificato all'interno di questo elenco.
Getta:
IndexOutOfBoundsException - Questa eccezione genererà un valore di indice endpoint non valido, ad esempio, dimensione fromIndex o fromIndex > toIndex.
Esempio 1
import java.util.LinkedList; import java.util.List; public class JavaListSubListExample1 { public static void main(String[] args) { int fromIndex=2; int toIndex=7; List list= new LinkedList(); for (int i=1;i<=10;i++){ 2 7 list.add(i); } system.out.println('list : '+list); it will return the elements present from index to at list.sublist(fromindex,toindex); system.out.println('elements position '+list.sublist(2,7)); < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> List : [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] Elements from 2 index position to 7 index position : [3, 4, 5, 6, 7] </pre> <h2>Example 2</h2> <pre> import java.util.LinkedList; import java.util.List; public class JavaListSubListExample_2 { public static void main(String[] args) { List list= new LinkedList(); for (char ch='a';chtoIndex it will throw an exception System.out.println('List : '+list.subList(18,12)); } } </pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> Total alphabets : 26 Exception in thread 'main' java.lang.IllegalArgumentException: fromIndex(18) >toIndex(12) atjava.util.SubList.(AbstractList.java:624) atjava.util.AbstractList.subList(AbstractList.java:484) at com.javaTpoint.JavaListSubListExample2.main(JavaListSubListExample2.java:12) </pre> <h2>Example 3</h2> <pre> import java.util.LinkedList; import java.util.List; public class JavaListSubListExample_3 { public static void main(String[] args) { List list= new LinkedList(); for (char ch='a';ch<='z';ch++){ list.add(ch); } system.out.println('total alphabets : '+list.size()); if fromindex<-1 || toindex< -1 it will throw an exception system.out.println('list '+list.sublist(-1,-1)); < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> Total alphabets : 26 Exception in thread 'main' java.lang.IndexOutOfBoundsException: fromIndex = -1 atjava.util.SubList.(AbstractList.java:620) atjava.util.AbstractList.subList(AbstractList.java:484) at com.javaTpoint.JavaListSubListExample3.main(JavaListSubListExample3.java:13) </pre></='z';ch++){></pre></=10;i++){> Esempio 2
import java.util.LinkedList; import java.util.List; public class JavaListSubListExample_2 { public static void main(String[] args) { List list= new LinkedList(); for (char ch='a';chtoIndex it will throw an exception System.out.println('List : '+list.subList(18,12)); } } Provalo adesso Produzione:
Total alphabets : 26 Exception in thread 'main' java.lang.IllegalArgumentException: fromIndex(18) >toIndex(12) atjava.util.SubList.(AbstractList.java:624) atjava.util.AbstractList.subList(AbstractList.java:484) at com.javaTpoint.JavaListSubListExample2.main(JavaListSubListExample2.java:12)
Esempio 3
import java.util.LinkedList; import java.util.List; public class JavaListSubListExample_3 { public static void main(String[] args) { List list= new LinkedList(); for (char ch='a';ch<=\'z\';ch++){ list.add(ch); } system.out.println(\'total alphabets : \'+list.size()); if fromindex<-1 || toindex< -1 it will throw an exception system.out.println(\'list \'+list.sublist(-1,-1)); < pre> <span> Test it Now </span> <p> <strong>Output:</strong> </p> <pre> Total alphabets : 26 Exception in thread 'main' java.lang.IndexOutOfBoundsException: fromIndex = -1 atjava.util.SubList.(AbstractList.java:620) atjava.util.AbstractList.subList(AbstractList.java:484) at com.javaTpoint.JavaListSubListExample3.main(JavaListSubListExample3.java:13) </pre></=\'z\';ch++){>