Java Array Exercises: Form the largest number from a given list of non negative integers

Java Array: Exercise-71 with Solution

Write a Java program to form the largest number from a given list of non negative integers.

Example:
Input :
nums = {1, 2, 3, 0, 4, 6}
Output:
Largest number using the said array numbers: 643210

Sample Solution:

Java Code:

import java.util.*;
public class solution {
	
 public static String  largest_Numbers(int[] num) {
        String[] array_nums = Arrays.stream(num).mapToObj(String::valueOf).toArray(String[]::new);
        Arrays.sort(array_nums, (String str1, String str2) -> (str2 + str1).compareTo(str1 + str2));
        return Arrays.stream(array_nums).reduce((a, b) -> a.equals("0") ? b : a + b).get();
    }	
	
  public static void main(String[] args)
  {
    int[] nums = {1, 2, 3, 0, 4, 6};
	System.out.printf("\nOriginal array: "+Arrays.toString(nums));	
	System.out.printf("\nLargest number using the said array numbers: "+largest_Numbers(nums));
   }  
}

Sample Output:

Original array: [1, 2, 3, 0, 4, 6]
Largest number using the said array numbers: 643210

Flowchart:

Java Code Editor:

Improve this sample solution and post your code through Disqus

Previous: Write a Java program to find the smallest length of a contiguous subarray of which the sum is greater than or equal to specified value. Return 0 instead.
Next: Write a Java program to find and print one continuous subarray (from a given array of integers) that if you only sort the said subarray in ascending order then the entire array will be sorted in ascending order.