Izmantojot Arrays.fill() metodi, mēs varam aizpildīt visu masīvu vai arī kādu tā daļu. Arrays.fill() metode spēj arī aizpildīt gan 2D, gan 3D masīvus.
Arrays fill() metodei ir šāda sintakse:
Java.util.Arrays.fill(boolean[] arr, int fromIndex, int toIndex, boolean val )
Šeit,
- The arr parametrs nosaka aizpildāmo masīvu.
- The formIndex parametrs nosaka pirmā elementa indeksu, kas jāaizpilda ar doto vērtību.
- The indeksēt parametrs definē pēdējā indeksa indeksu, kas jāaizpilda ar doto vērtību.
- The val parametrs nosaka vērtību, kas jāsaglabā visos dotā masīva elementos.
Apskatīsim dažus piemērus, lai saprastu, kā masīva aizpildīšanai var izmantot metodi Arrays.fill().
Aizpildiet visu 1-D masīvu
ArraysFillExample1.java
// import required classes and packages import java.util.Arrays; import java.util.Scanner; // create ArraysFillExample1 to fill sub-array to given array public class ArraysFillExample1 { //main() method start public static void main(String[] args) { int size, ele; Scanner sc = new Scanner(System.in); System.out.print('Enter the size of the array: '); size = sc.nextInt(); //creates an array of size 100 int[] array = new int[100]; System.out.println('Enter the elements in the array: '); for(int i = 0; i <size; i++) { array[i]="sc.nextInt();" } system.out.print('enter the element which you want to fill in array: '); ele="sc.nextInt();" complete array with arrays.fill(array, ele); system.out.println('after filling' +ele+ ' array: ' + arrays.tostring(array)); < pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/java-tutorial/03/java-arrays-fill.webp" alt="Java Arrays Fill"> <h3>Fill some part of 1-D Array</h3> <p> <strong>ArraysFillExample2.java</strong> </p> <pre> // import required classes and packages import java.util.Arrays; import java.util.Scanner; // create ArraysFillExample2 to fill some part of the array with the given value public class ArraysFillExample2 { //main() method start public static void main(String[] args) { int size, ele, index1, index2; Scanner sc = new Scanner(System.in); System.out.print('Enter the size of the array: '); size = sc.nextInt(); //creates an array of size 100 int[] array = new int[100]; System.out.println('Enter the elements in the array: '); for(int i = 0; i <size; i++) { array[i]="sc.nextInt();" } system.out.print('enter the element which you want to fill in array: '); ele="sc.nextInt();" system.out.print('from index '+ele+' index1="sc.nextInt();" system.out.print('to index2="sc.nextInt();" complete array with arrays.fill(array, index1, index2, ele); system.out.println('after filling' +ele+ ' array: ' + arrays.tostring(array)); < pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/java-tutorial/03/java-arrays-fill-2.webp" alt="Java Arrays Fill"> <h3>Fill multidimensional array (2D Array)</h3> <p>Just like a single-dimensional array, we can also fill the multidimensional array by using the Arrays.fill() method. In order to fill a multidimensional array, we use the for loop to fill each row of the multidimensional array.</p> <p>Let's take an example to understand how we can fill a multidimensional array using the Arrays.fill() method.</p> <p> <strong>ArraysFillExample3.java</strong> </p> <pre> // import required classes and packages package javaTpoint.MicrosoftJava; import java.util.Arrays; import java.util.Scanner; // create ArraysFillExample3 to fill the multidimensional array with the given value public class ArraysFillExample3 { //main() method start public static void main(String[] args) { int ele; // create scanner class object Scanner sc = new Scanner(System.in); System.out.print('Enter the size of the array: '); System.out.print('Enter size of row : '); int rows = sc.nextInt(); System.out.print('Enter size of column : '); int columns = sc.nextInt(); // create an array of size row*column int twoDArray[][] = new int[rows][columns]; System.out.println('Enter the elements in the array: '); for(int i = 0; i <rows; i++) { for(int j="0;" < columns; j++) system.out.println('enter element ['+i+']['+j+']'); twodarray[i][j]="sc.nextInt();" } system.out.print('enter the which you want to fill in array: '); ele="sc.nextInt();" system.out.println('multi-dimensional array after inserting elements: system.out.println(arrays.deeptostring(twodarray)); complete with for (int[] row : twodarray) arrays.fill(row, ele); system.out.println('after filling' +ele+ ' array: ' + arrays.deeptostring(twodarray)); sc.close(); pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/java-tutorial/03/java-arrays-fill-3.webp" alt="Java Arrays Fill"> <p> <strong>ArraysFillExample4.java</strong> </p> <pre> // import required classes and packages package javaTpoint.MicrosoftJava; import java.util.Arrays; import java.util.Scanner; // create ArraysFillExample4 to fill 3D array with the given value public class ArraysFillExample4 { //main() method start public static void main(String[] args) { int ele; // create scanner class object Scanner sc = new Scanner(System.in); System.out.print('Enter the size of the array: '); System.out.print('x : '); int x = sc.nextInt(); System.out.print('y : '); int y = sc.nextInt(); System.out.print('z : '); int z = sc.nextInt(); // create an array of size row*column int threeDArray[][][] = new int[x][y][z]; System.out.println('Enter the elements in the array: '); for(int i=0; i <threedarray.length; i++){ for(int j="0;" < threedarray[i].length; j++){ k="0;" threedarray[i][j].length; k++){ system.out.println('enter element ['+i+']['+j+']['+k+']'); threedarray[i][j][k]="sc.nextInt();" } system.out.print('enter the which you want to fill in array: '); ele="sc.nextInt();" system.out.println('3d array after inserting elements: system.out.println(arrays.deeptostring(threedarray)); complete with for (int[][] newrow : threedarray) { (int[] newrowcolumn newrow) arrays.fill(newrowcolumn, ele); system.out.println('after filling' +ele+ ' array: ' + arrays.deeptostring(threedarray)); sc.close(); pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/java-tutorial/03/java-arrays-fill-4.webp" alt="Java Arrays Fill"> <hr></threedarray.length;></pre></rows;></pre></size;></pre></size;>