Beginner Java programming

 

I  need help with my code. can someone please help me by telling me how to fix it and explain the logic behind my errors. I don't know if my "if" statement is correct. my program doesn't run and I really need to learn this.

/import statement

import java.util.Scanner;

import java.lang.*;

//class variables

public class JavaCoffee {

private boolean On = (true);

private boolean Off = (false);

public JavaCoffee(boolean on,boolean off,boolean On,boolean Off){

  this.On=On;

  this.Off=Off;

  this.On=on;

  this.Off=off;

}

public JavaCoffee (boolean On){

if (On) {

System.out.println("Brewing" );

System.out.println(" (   (");

System.out.println(" )   )");

System.out.println(" ...........");

System.out.println(" |     |]");

System.out.println(" '.    /");

System.out.println("  `-----'");

}

 public JavaCoffee (boolean Off){

else (Off) {

System.out.println("***Off***");

System.exit(0);

}

}

}

----------------------------------------------

import java.util.Scanner;

class TestJavaCoffee{

public static void main(String[] args) {

JavaCoffee coffee = new JavaCoffee(boolean On, boolean Off);

System.out.println("Enter On to brew coffe, or Off to power off");

Scanner scanner = new Scanner (System.in);

String On = scanner.nextLine();

}

}