Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind Java How To - Second Largest Array Element?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Fill blank
Complete the missing token from the example code.
___[] nums = {12, 5, 9, 21, 21, 7};How To Find the Second Largest Element in an Array
Find the second highest number without sorting the whole array:
Example
int[] nums = {12, 5, 9, 21, 21, 7};
Integer first = null, second = null;
for (int n : nums) {
if (first == null || n > first) {
second = first;
first = n;
} else if ((second == null || n > second) && n != first) {
second = n;
}
}
if (second != null) {
System.out.println("Second largest: " + second);
} else {
System.out.println("No distinct second largest value.");
}