The set() metoda java.util.ArrayLis t razred se uporablja za zamenjavo elementa na podanem mestu na tem seznamu s podanim elementom.
Sintaksa:
public E set(int index, E element)>
Parametri: Ta metoda sprejme naslednji argument kot parameter.
- index- indeks elementa za zamenjavo element- element, ki bo shranjen na določenem mestu
Vrne vrednost: Ta metoda vrne element prej na določenem mestu.
Izjema: Ta metoda vrže IndexOutOfBoundsException če indeks ni v obsegu velikosti seznama ArrayList.
Spodaj so primeri za ponazoritev set() metoda.
Primer 1:
java povratni niz
// Java program to demonstrate> // set() method> // for Integer value> > import> java.util.*;> > public> class> GFG1 {> >public> static> void> main(String[] argv)>throws> Exception> >{> >try> {> > >// Creating object of ArrayList> >ArrayList> >arrlist =>new> ArrayList();> > >// Populating arrlist1> >arrlist.add(>1>);> >arrlist.add(>2>);> >arrlist.add(>3>);> >arrlist.add(>4>);> >arrlist.add(>5>);> > >// print arrlist> >System.out.println(>'Before operation: '> >+ arrlist);> > >// Replacing element at the index 3 with 30> >// using method set()> >int> i = arrlist.set(>3>,>30>);> > >// Print the modified arrlist> >System.out.println(>'After operation: '> >+ arrlist);> > >// Print the Replaced element> >System.out.println(>'Replaced element: '> >+ i);> >}> > >catch> (IndexOutOfBoundsException e) {> >System.out.println(>'Exception thrown: '> >+ e);> >}> >}> }> |
kaj je sklad java
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bdrevo in b drevo
>Izhod:
Before operation : [1, 2, 3, 4, 5] After operation : [1, 2, 3, 30, 5] Replaced element : 4>
Primer 2: Za IndexOutOfBoundsException
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// Java program to demonstrate> // set() method> // for IndexOutOfBoundsException> > import> java.util.*;> > public> class> GFG1 {> >public> static> void> main(String[] argv)>throws> Exception> >{> >try> {> > >// Creating object of ArrayList> >ArrayList> >arrlist =>new> ArrayList();> > >// Populating arrlist1> >arrlist.add(>1>);> >arrlist.add(>2>);> >arrlist.add(>3>);> >arrlist.add(>4>);> >arrlist.add(>5>);> > >// print arrlist> >System.out.println(>'Before operation : '> >+ arrlist);> > >// Replacing element at the index 7 with 30> >// using method set()> >System.out.println(>'
Trying to Replace'> >+>' the element at'> >+>' (index>Zmogljivost) '>);> >int> i = arrlist.set(>7>,>30>);> > >// Print the modified arrlist> >System.out.println(>'After operation: '> >+ arrlist);> > >// Print the Replaced element> >System.out.println(>'Replaced element: '> >+ i);> >}> > >catch> (IndexOutOfBoundsException e) {> >System.out.println(>'Exception thrown : '> + e);> >}> >}> }> |
>
>Izhod:
Before operation : [1, 2, 3, 4, 5] Trying to Replace the element at (index>Kapaciteta) Vržena izjema: java.lang.IndexOutOfBoundsException: Indeks: 7, Velikost: 5>