read lines of file randomly java
import java.io.*;
import java.util.*;
public class GetLine {
public static void main(String[] args) throws FileNotFoundException {
System.out.println("Random Line : "+randomLine());
}
public static void randomLine() throws FileNotFoundException {
File f = new File("file.txt");
String result = null;
Random rand = new Random();
int n = 0;
Scanner sc = new Scanner(f);
while (sc.hasNext()) {
++n;
String line = sc.nextLine();
if (rand.nextInt(n) == 0)
result = line;
}
sc.close();
return result;
}
}