Getting error while verifying TOAST MESSAGES

Pre-requisites:
Appium version -> 1.13.0
Libraries: (Added to MAVEN Dependencies)
tess4j.jar -> 4.3.1
jna.jar -> 5.3.1
lept4j -> 1.10.0
Device Specification:
OS - Ubuntu 16.04
OS Type - 64 bit

ECLISPE CONSOLE:

Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'tesseract':
libtesseract.so: cannot open shared object file: No such file or directory
libtesseract.so: cannot open shared object file: No such file or directory
Native library (linux-x86-64/libtesseract.so) not found in resource path ([file:/home/<username>/workspace/Appium/target/classes/, ...])
	at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:302)
	at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:455)
	at com.sun.jna.Library$Handler.<init>(Library.java:192)
	at com.sun.jna.Native.loadLibrary(Native.java:646)
	at com.sun.jna.Native.loadLibrary(Native.java:630)
	at net.sourceforge.tess4j.util.LoadLibs.getTessAPIInstance(LoadLibs.java:85)
	at net.sourceforge.tess4j.TessAPI.<clinit>(TessAPI.java:42)
	at net.sourceforge.tess4j.Tesseract.init(Tesseract.java:426)
	at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:222)
	at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:194)
	at mobile_app.Toastmessages.OCR(Toastmessages.java:80)
	at mobile_app.Toastmessages.main(Toastmessages.java:46)
	Suppressed: java.lang.UnsatisfiedLinkError: libtesseract.so: cannot open shared object file: No such file or directory
		at com.sun.jna.Native.open(Native Method)
		at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:191)
		... 11 more
	Suppressed: java.lang.UnsatisfiedLinkError: libtesseract.so: cannot open shared object file: No such file or directory
		at com.sun.jna.Native.open(Native Method)
		at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:204)
		... 11 more

CODE: (for capturing Screenshot & creating a folder)

public class Toastmessages{
public void takeScreenshot(){
// Create a folder name to store Screenshots.
		String destDir = "Screenshots";
// Capture the Screenshot.
		File scrFile = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
// Set Date Format to set it as the Screenshot File Name.
		SimpleDateFormat dateFormat = new SimpleDateFormat("dd-mm--yyyy");
// Create folder under project (for storing the Screenshots)
		new File(destDir).mkdirs();
// Create a file name using Date Format.
		String destFile = dateFormat.format(new Date()) + ".png";
		
		try {
			FileUtils.copyFile(scrFile, new File(destDir + "/" + destFile));
			scrPath = destDir + "/" + destFile;
		} catch (IOException e) {
			e.printStackTrace();
		}		
	}
	public static String OCR(String Imgpath){
		String result = null;
		File imgfile = new File(Imgpath);
		ITesseract inst = new Tesseract();
		try {
			result = inst.doOCR(imgfile);
		} catch (Exception e) {
			System.err.println(e.getMessage());
		}
		return result;	
	}

	public static void main(){
		Toastmessages tmsg = new Toastmessages();
		tmsg.takeScreenshot();
		String Text = OCR(scrPath);
		System.out.println(Text);
		Assert.assertTrue(Text.contains("Activity1 will continue"), "Activity will continue");
	}
}

Unable to load library ‘tesseract’ - problem in your code.

Try any link to solve e.g. https://stackoverflow.com/questions/18419504/java-tesseract-error-in-linux-unable-to-load-library-tesseract-libtesseract