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Copy pathBinarySearch.java
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42 lines (31 loc) · 985 Bytes
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public class BinarySearch {
public static int binarySearch(int arr[], int low, int high, int key) {
int mid = (low + high) / 2;
while (low <= high) {
if (arr[mid] < key) {
low = mid + 1;
} else if (arr[mid] == key) {
return mid;
} else {
high = mid - 1;
}
mid = (low + high) / 2;
}
if (low > high) {
return -1;
}
return -1;
}
public static void main(String[] args) {
int intArray[] = {7, 8, 9};
int key = 5;
if (binarySearch(intArray, 0, 5, key) != -1) {
System.out.print("searching `");
System.out.print(key);
System.out.print("` in the array... it's at index ");
System.out.println(binarySearch(intArray, 0, 5, key));
} else {
System.out.println("index not found");
}
}
}