Here is one of the first projects I made as starting in C coding, so you may find it useful to read it over, its highly conditional based.

Code:
import java.util.Random;
import java.util.Scanner;

public class RockPaperScissors
{
	public static void main(String[]args)
	{

		Random rand = new Random();
		Scanner scan = new Scanner(System.in);
		
		int Rock = 1;
		int Paper = 2;
		int Scissors = 3;
		int user = 0;
		int CPU = 4;
		
		System.out.println("---:Rock-Paper-Scissors Game:---");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 9 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
			
		System.out.println("Again? 8 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
		
		System.out.println("Again? 7 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 6 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 5 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 4 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 3 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 2 games left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
			
		System.out.println("Again? 1 game left.");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");
		
				System.out.println("Again? Last game!");
		System.out.println("Enter 1 for Rock.");
		System.out.println("Enter 2 for Paper.");
		System.out.println("Enter 3 for Scissors.");
		System.out.print("Enter your choice: ");
		
		user = scan.nextInt();
		
		if(user==1)
		{
			System.out.println("You entered Rock.");
		}
		else if(user==2)
			System.out.println("You entered Paper.");
		else if(user==3)
			System.out.println("You entered Scissors");
			
		CPU = rand.nextInt(3)+1;
			
		if(CPU==1)
		{
			System.out.println("The CPU chose Rock.");
		}
		else if(CPU==2)
			System.out.println("The CPU chose Paper.");
		else if(CPU==3)
			System.out.println("The CPU chose Scissors.");
		if(user==1 && CPU==1)
		{
			System.out.println("Tie game.");
		}
		else if(user==1 && CPU ==2)
			System.out.println("Paper covers Rock. You lose.");
		else if(user==1 && CPU==3)
			System.out.println("Rock smashes Scissors. You win!");
		else if(user==2 && CPU==1)
			System.out.println("Paper covers Rock. You win!");
		else if(user==2 && CPU==2)
			System.out.println("Tie game.");
		else if(user==2 && CPU==3)
			System.out.println("Scissors cuts Paper. You lose.");
		else if(user==3 && CPU==3)
			System.out.println("Tie game.");
		else if(user==3 && CPU==2)
			System.out.println("Scissors cuts Paper. You win!");
		else if(user==3 && CPU==1)
			System.out.println("Rock smashes Scissors. You lose.");
		else if(user<=0)
			System.out.println("Error, you cannot use negative numbers or \"0\".");
		else if(user<=4)
			System.out.println("Error, \"4\" is not a valid selection.");

	}
}