Get the length of longest row in a two dimensional jagged array in Java

Java support jagged arrays. A Jagged array is an array whose elements are arrays with different dimensions.

 

There are two ways to define a Jagged arrays.

a.   Specify the jagged array size using array declaration

b.   Define the array elements, let Java deduce the size

 

 

Specify the jagged array size using array declaration

 

Example

int arr[][] = new int[3][];

arr[0] = new int[2];

arr[1] = new int[6];

arr[2] = new int[4];

 

Above snippet define a two-dimensional array, where

a.   arr[0] of size 2

b.   arr[1] of size 6

c.    arr[2] of size 4.

 

In the above example, 1^st row is the longest among all the rows in the given 2-dimensional array.

 

Below snippet print the length of longest row.

int longestRow = 0;

for (int i = 0; i < arr.length; i++) {
	if (arr[i].length > longestRow) {
      longestRow = arr[i].length;
    }
}

 

Find the below working application.

 

LongestRowLength.java

 

package com.sample.app;

public class LongestRowLength {
	
	public static void main(String[] args) {
		int[][] arr = {
				{1, 2},
				{5, 6, 7, 8, 13, 14},
				{9, 10, 11, 12}
		};
		
		int longestRow = 0;
		
		for (int i = 0; i < arr.length; i++) {
			if (arr[i].length > longestRow) {
		      longestRow = arr[i].length;
		    }
		}
		
		System.out.println("Length of longest row is : " + longestRow);
	}

}

 

Output

Length of longest row is 6

 

 

 

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