Java Exercises: Find a specified element in a given array of elements using Binary Search
Java Search: Exercise-1 with Solution
Write a Java program to find a specified element in a given array of elements using Binary Search.
Sample Solution:
Java Code:
public class Main {
public static int binarySearch(int[] nums, int flag) {
int hi_num = nums.length - 1;
int lo_num = 0;
while (hi_num >= lo_num) {
int guess = (lo_num + hi_num) >>> 1;
if (nums[guess] > flag) {
hi_num = guess - 1;
} else if (nums[guess] < flag) {
lo_num = guess + 1;
} else {
return guess;
}
}
return -1;
}
public static void main(String[] args) {
int[] nums = {1, 5, 6, 7, 8, 11};
int search_num = 7;
int index = binarySearch(nums, search_num);
if (index == -1) {
System.out.println(search_num + " is not in the array");
} else {
System.out.println(search_num + " is at index " + index);
}
}
}
Sample Output:
7 is at index 3
Flowchart:
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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