Error in running Appium script

Issues/Bugs
1

Iam running the below appium script:

package appPackage;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.Test;
import io.appium.java_client.android.AndroidDriver;
public class App {

public static AndroidDriver driver = null;
@Test
public void tcase1() throws MalformedURLException
{
	
	File f=new File(System.getProperty("D:/Tejus/Projects/Omniprenuer/hausmart.apk"));
	
	DesiredCapabilities cap=new DesiredCapabilities();
	cap.setCapability("deviceName", "virtualdevice");
	cap.setCapability("platformName", "Android");
	cap.setCapability("app", f);
	cap.setCapability("automationName" , "uiautomator2");
	cap.setCapability("appPackage", "com.example.work.hausmart");
	cap.setCapability("activityName", "com.example.work.hausmart.Splash");
	
	driver = new AndroidDriver(new URL("http://0.0.0.0:4723/wd/hub"), cap); 
	driver.manage().timeouts().implicitlyWait(60, TimeUnit.SECONDS);

}
}

The below is the error which is showing in the console, Please suggest how to fix this issue:

[RemoteTestNG] detected TestNG version 6.14.3
FAILED: tcase1
java.lang.NullPointerException
at java.io.File.(Unknown Source)
at appPackage.App.tcase1(App.java:23)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:583)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:719)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:989)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:648)
at org.testng.TestRunner.run(TestRunner.java:505)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
at org.testng.SuiteRunner.run(SuiteRunner.java:364)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
at org.testng.TestNG.runSuites(TestNG.java:1049)
at org.testng.TestNG.run(TestNG.java:1017)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

===============================================
Default test
Tests run: 1, Failures: 1, Skips: 0

===============================================
Default suite
Total tests run: 1, Failures: 1, Skips: 0

2

Check your file path.

3

Try this

File f=new File(System.getProperty(“D://Tejus//Projects//Omniprenuer//hausmart.apk”));

4

Why are you using System.getproperty() ?
just use
File f=new File(“D:/Tejus/Projects/Omniprenuer/hausmart.apk”);