💥Find Second Largest(Maximum) in Array ☕Java Interview Programs👨🎓Campus Interview Programs 🎁👩🏫Java
🎯 Java Program – Find Second Maximum Element in Array
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In this video, we learn how to find the Second Largest (Second Maximum) element in an Array using Java.
This is a very popular Java interview program and helps beginners clearly understand:
✅ Array traversal
✅ Comparison logic
✅ Using two variables (first and second)
✅ Finding second largest in a single loop
This program is very useful for:
✔ Freshers
✔ College students
✔ Java beginners
✔ Campus placements
Please watch till the end and practice on your own laptop.
🧠 What is Second Maximum?
Second Maximum means:
👉 The second biggest number in the array.
Example:
Array:
2, 1, 4, 3, 9, 7, 8, 0, 10
Largest = 10
Second Largest = 9
🧠 Variables Used
arr → array elements
first → stores largest value
second → stores second largest value
i → loop counter
✅ Logic Explanation Step by Step
Step 1 – Declare array
int[] arr = {2,1,4,3,9,7,8,0,10};
Step 2 – Initialize variables
int first = 0;
int second = 0;
first holds maximum
second holds second maximum
Step 3 – Loop through array
for(int i=0; i is less than arr.length; i++)
Loop checks every element.
Step 4 – Compare with first (largest)
if(arr[i] is greater than first)
Then:
second = first;
first = arr[i];
Meaning:
Old largest moves to second
New value becomes largest
Step 5 – Compare with second
else if(arr[i] is greater than second)
Then:
second = arr[i];
This handles values between first and second.
🧪 Dry Run
Array:
2, 1, 4, 3, 9, 7, 8, 0, 10
Start:
first = 0
second = 0
Process:
2 → first becomes 2
1 → second becomes 1
4 → second becomes 2, first becomes 4
3 → second becomes 3
9 → second becomes 4, first becomes 9
7 → second becomes 7
8 → second becomes 8
0 → no change
10 → second becomes 9, first becomes 10
Final:
first = 10
second = 9
Step 6 – Print result
System.out.println(second);
Output:
9
⭐ Why Interviewers Ask This?
Tests:
✔ Array traversal
✔ Nested comparison
✔ Logical thinking
✔ Optimized single loop
⚠ Common Mistakes
❌ Forgetting to update second before first
❌ Using sorting instead of logic
❌ Initializing wrongly
❌ Missing else condition
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