Buy and Sell Stock Only Once to Maximize Profit

package org.wesome.dsalgo;

public class StockBuySell {
    public static void maxProfit(int[] sharePrice) {
        if (sharePrice == null || sharePrice.length == 0) {
            System.out.println("invalid share Price = " + sharePrice);
            return;
        }
        int buyPrice = sharePrice[0];
        int sellPrice = sharePrice[0];
        int buyDay = 0;
        int sellDay = 0;
        int profit = Integer.MIN_VALUE;

        for (int i = 0; i < sharePrice.length; i++) {
            int todayPriceDiff = sharePrice[i] - buyPrice;
            if (todayPriceDiff > profit) {
                profit = todayPriceDiff;
                sellDay = i + 1;
                sellPrice = sharePrice[i];
            }
            if (sharePrice[i] < buyPrice) {
                buyPrice = sharePrice[i];
                buyDay = i + 1;
            }
        }
        System.out.println("buyPrice at = " + buyPrice + "Rs on = " + buyDay + " day and sellPrice at = " + sellPrice + " Rs on = " + sellDay + "day will give max profit of = " + profit);
    }
}

package org.wesome.dsalgo;

import org.junit.jupiter.api.Test;

public class StockBuySellTest {
    @Test
    void maxProfit() {
        StockBuySell.maxProfit(new int[]{100, 180, 260, 310, 40, 535, 695});
    }
}

plugins {
    id 'org.springframework.boot' version '2.5.4'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
}

group = 'org.wesome'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = JavaVersion.VERSION_1_8

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
    useJUnitPlatform()
}