React 33-40

Please learn about @SpringBootApplication also

@SpringBootApplication
public class Application {

public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}

}

### 6. Add a main controller

java
package com.example.demo;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MainController {

@GetMapping("/")
public String index() {
return "Hello, World!";
}

}

### 7. Run the application

mvn spring-boot:run
`

### 8. Visit http://localhost:8080

You should see `Hello, World!`

@SpringBootApplication
public class App {

public static void main(String[] args) {
SpringApplication.run(App.class, args);
}

}
</code>
I have created a controller to test the basic rest call :
<code>package com.santhosh.rest.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HomeController {

@GetMapping("/")
public String home() {
return "Welcome to the world of rest";
}

}
</code>
When I hit the url <code>localhost:8080/</code> I am getting below error :
<code>Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Tue Apr 09 11:45:37 IST 2019
There was an unexpected error (type=Not Found, status=404).
No message available
</code>
Please help me to resolve this issue.


A:


verify if your application is running on the port 8080
check your mapping annotation
check if your application is not running multiple instances

if you are using eclipse, you can check the log console for more details about the error

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Do work on this part

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public class IndexOutOfBoundException {

public static void main(String[] args) {

int[] arr = {1,2,3,4,5};

try {
for(int i = 0; i <= arr.length; i++) {
System.out.println(arr[i]);
}
} catch(ArrayIndexOutOfBoundsException e) {
System.out.println("Index Out Of Bound Exception");
}

}

}

Throw this exception if you don't know the answer