Java Program to find Smallest Number in an Array

by Online Tutorials Library July 22, 2014

Java Program to find Smallest Number in an Array

We can find the smallest element or number in an array in java by sorting the array and returning the 1st element. Let’s see the full example to find the smallest number in java array.

 public class SmallestInArrayExample{ public static int getSmallest(int[] a, int total){ int temp; for (int i = 0; i < total; i++)          {             for (int j = i + 1; j < total; j++)              {                 if (a[i] > a[j])                  {                     temp = a[i];                     a[i] = a[j];                     a[j] = temp;                 }             }         }        return a[0]; } public static void main(String args[]){ int a[]={1,2,5,6,3,2}; int b[]={44,66,99,77,33,22,55}; System.out.println(“Smallest: “+getSmallest(a,6)); System.out.println(“Smallest: “+getSmallest(b,7)); }} 

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Output:

Smallest: 1 Smallest: 22

Find Smallest Number in Array using Arrays

Let's see another example to get the smallest element or number in java array using Arrays.

 import java.util.*; public class SmallestInArrayExample1{ public static int getSmallest(int[] a, int total){ Arrays.sort(a); return a[0]; } public static void main(String args[]){ int a[]={1,2,5,6,3,2}; int b[]={44,66,99,77,33,22,55}; System.out.println("Smallest: "+getSmallest(a,6)); System.out.println("Smallest: "+getSmallest(b,7)); }} 

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Output:

Smallest: 1 Smallest: 22

Find Smallest Number in Array using Collections

Let's see another example to get smallest number in java array using collections.

 import java.util.*; public class SmallestInArrayExample2{ public static int getSmallest(Integer[] a, int total){ List list=Arrays.asList(a); Collections.sort(list); int element=list.get(0); return element; } public static void main(String args[]){ Integer a[]={1,2,5,6,3,2}; Integer b[]={44,66,99,77,33,22,55}; System.out.println("Smallest: "+getSmallest(a,6)); System.out.println("Smallest: "+getSmallest(b,7)); }} 

Test it Now

Output:

Smallest: 1 Smallest: 22

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