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## CatInFile
### Instructions
Create a file named `CatInFile.java`.
Write a function `cat` that reads from standard input and write to file given as parameter.
> You may read from the input some binary content.
> 💡 Be aware of how much you read at once.
### Expected Functions
```java
import java.io.*;
public class CatInFile {
public static void cat(String[] args) throws IOException {
// your code here
}
}
```
### Usage
Here is a possible ExerciseRunner.java to test your function :
```java
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
public class ExerciseRunner {
public static void main(String[] args) throws IOException {
String input = "input file test\n";
ByteArrayInputStream in = new ByteArrayInputStream(input.getBytes());
System.setIn(in);
CatInFile.cat(new String[]{"output"});
String fileContent = new String(Files.readAllBytes(Paths.get("output")));
System.out.println(fileContent.equals(input));
}
}
```
and its output :
```shell
$ javac *.java -d build
$ java -cp build ExerciseRunner
true
$
```
### Notions
[Command-Line Arguments](https://docs.oracle.com/javase/tutorial/essential/environment/cmdLineArgs.html)
[File](https://docs.oracle.com/javase/7/docs/api/java/nio/file/Files.html)
[Standard Input](https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html)