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:
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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.
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Java: Tips of the Day
countOccurrences
Counts the occurrences of a value in an array.
Use Arrays.stream().filter().count() to count total number of values that equals the specified value.
public static long countOccurrences(int[] numbers, int value) { return Arrays.stream(numbers) .filter(number -> number == value) .count(); }
Ref: https://bit.ly/3kCAgLb
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