Jagged Array in Java
Java support Jagged Arrays. You can have a different length for each column do not need to have same no of the column for all rows.
Example:-
public class JaggedArray { public static void main(String ar[]) { int[][] a=new int[2][]; a[0]=new int[2]; a[1]=new int[4]; a[0][0]=1; a[0][1]=12; a[1][0]=10; a[1][1]=3; a[1][2]=12; a[1][3]=13; System.out.println("length-"+a.length); for (int i = 0; i < a.length; i++) { for (int k = 0; k < a[i].length; k++) { System.out.print(a[i][k]+" , "); } System.out.println(""); } } }
Output:-
length-2 1 , 12 , 10 , 3 , 12 , 13 ,
Curious why this happens? In Java, every 2D or 3D arrays is just an array having each element as an array. So if you create a 2D array with length 2,3 then it will create one array with length 2 and that array will have 2 different arrays with length 3 as it’s element.
Wanna know more about Arrays in java? Go here