### How to read a text file in Java?

In short, Scanner.

### Demo code

Code below showing how to use `Scanner` class to read a text file line by line in Java.

```java
try {
	
	// init file
	File mFile = new File("/root/example.txt");
	
	// init scanner
	Scanner mScanner = new Scanner(mFile);
	
	// while has next line
	while( mScanner.hasNextLine() ) {
		
		// get line string
		String mLine = mScanner.nextLine();

		// do something
	}

} catch ( FileNotFoundException e ) {
	
	// trace error
	e.printStackTrace()
}
```