java.util.Arrays.fill() mètode està en classe java.util.Arrays . Aquest mètode assigna el valor del tipus de dades especificat a cada element de l'interval especificat de la matriu especificada.
Syntax: // Makes all elements of a[] equal to 'val' public static void fill (int[] a, int val) // Makes elements from from_Index (inclusive) to to_Index // (exclusive) equal to 'val' public static void fill (int[] a, int from_Index, int to_Index, int val) This method doesn't return any value.>
Exceptions it Throws: IllegalArgumentException - if from_Index>to_Index ArrayIndexOutOfBoundsException - si from_Index a.length>
Exemples:
vora amb css
Podem omplir tota la matriu.
// Java program to fill a subarray of given array> import> java.util.Arrays;> > public> class> Main> {> >public> static> void> main(String[] args)> >{> >int> ar[] = {>2>,>2>,>1>,>8>,>3>,>2>,>2>,>4>,>2>};> > >// To fill complete array with a particular> >// value> >Arrays.fill(ar,>10>);> >System.out.println(>'Array completely filled'> +> >' with 10
'> + Arrays.toString(ar));> >}> }> |
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Sortida:
Array completely filled with 10 [10, 10, 10, 10, 10, 10, 10, 10, 10]>
Podem omplir part de la matriu.
// Java program to fill a subarray array with> // given value.> import> java.util.Arrays;> > public> class> Main> {> >public> static> void> main(String[] args)> >{> >int> ar[] = {>2>,>2>,>2>,>2>,>2>,>2>,>2>,>2>,>2>};> > >// Fill from index 1 to index 4.> >Arrays.fill(ar,>1>,>5>,>10>);> > >System.out.println(Arrays.toString(ar));> >}> }> |
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Sortida:
[2, 10, 10, 10, 10, 2, 2, 2, 2]>
Podem omplir una matriu multidimensional
Podem utilitzar un bucle per omplir una matriu multidimensional.
1) Ompliu la matriu 2D
// Java program to fill a multidimensional array with> // given value.> import> java.util.Arrays;> > public> class> Main> {> >public> static> void> main(String[] args)> >{> >int> [][]ar =>new> int> [>3>][>4>];> > >// Fill each row with 10.> >for> (>int>[] row : ar)> >Arrays.fill(row,>10>);> > >System.out.println(Arrays.deepToString(ar));> >}> }> |
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Sortida:
[[10, 10, 10, 10], [10, 10, 10, 10], [10, 10, 10, 10]]>
2) Ompliu la matriu 3D
com convertir string en int
// Java program to fill a multidimensional array with> // given value.> > import> java.util.Arrays;> > class> GFG {> > >public> static> void> main(String[] args) {> >int>[][][] ar =>new> int>[>3>][>4>][>5>];> > >// Fill each row with -1.> >for> (>int>[][] row : ar) {> >for> (>int>[] rowColumn : row) {> >Arrays.fill(rowColumn, ->1>);> >}> >}> > >System.out.println(Arrays.deepToString(ar));> >}> }> |
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Sortida:
[[[-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1]], [[-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1]], [[-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1], [-1, -1, -1, -1, -1]]]>