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Java Program to find Second Smallest Number in an Array

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robaa
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2022-11-12
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We can find the second smallest number in an array in java by sorting the array and returning the 2nd element.

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robaa
2022-11-12
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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

 

Find 2nd Smallest Number in Array using Arrays

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

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:

Second smallest: 2
Second smallest: 33

 

Find 2nd Smallest Number in Array using Collections

Let's see another example to get second smallest number in java 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:

Second smallest: 2
Second smallest: 33

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