Finding the second smallest number in a Java array

To find the second smallest number in a Java array, we can follow a simple approach of sorting the array in ascending order and then returning the element at the second index.

public class SecondSmallestInArrayExample{ 
public static int getSecondSmallest(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[1];//2nd element because index starts from 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("Second smallest: "+getSecondSmallest(a,6)); 
System.out.println("Second smallest: "+getSecondSmallest(b,7)); 
}}

Output:

Second smallest: 2
Second smallest: 33

Finding the second smallest number in an array using Arrays in Java

import java.util.*; 
public class SecondSmallestInArrayExample1{ 
public static int getSecondSmallest(int[] a, int total){ 
Arrays.sort(a); 
return a[1]; 
} 
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("Second Smallest: "+getSecondSmallest(a,6)); 
System.out.println("Second Smallest: "+getSecondSmallest(b,7)); 
}}

Output:

Finding the second smallest number in an array using collections

import java.util.*;  
public class SecondSmallestInArrayExample2{  
public static int getSecondSmallest(Integer[] a, int total){  
List<Integer> list=Arrays.asList(a);  
Collections.sort(list);  
int element=list.get(1);  
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("Second Smallest: "+getSecondSmallest(a,6));  
System.out.println("Second Smallest: "+getSecondSmallest(b,7));  
}}

Output:

In conclusion, by sorting the array in ascending order using the Arrays.Sort() method and return the element at the second index, we can easily find the second smallest number in a Java array. Follow tutorials.freshersnow.com to learn more.