Compiling activities with Nested Switch

import java.util.Scanner;
public class Activitiesfusionswitch {

	public static void main(String[] args) {
		/* Combining All Activities using Switch method
		 * RnB Dela Pe�a
     	 */

		Scanner rnb = new Scanner(System.in);
		System.out.print("Choose Number 1-8 for Activities: ");
		int activity=rnb.nextInt();

		switch (activity) {
		case 1: System.out.println("\nYou Choose Activity 1 ADD or EVEN Number ");
				System.out.print("\nPlease Enter Number: ");
				int ae=rnb.nextInt();
				if (ae%2 == 0) {
				System.out.print(ae+ " is an even number");
				}
				else
				{
					System.out.print("This is an ODD number");
					}
			break;
			case 2: System.out.print("You Choose Activity 5 Colors Using Switch");
		System.out.print("Choose a letter from R O Y G B I V or r o y g b i v:: ");
		String InputColor = rnb.next();

		switch (InputColor){
		case "R": case "r":
		System.out.print("The color you have selected is Red");
		break;
		case "O": case "o":
		System.out.print("The color you have selected is Orange");
					break;
		case "Y": case "y":
		System.out.print("The color you have selected is Yellow");
					break;
		case "G": case "g":
		System.out.print("The color you have selected is Green");
					break;
		case "B": case "b":
		System.out.print("The color you have selected is Blue");
					break;

		case "I": case "i":
		System.out.print("The color you have selected is Indigo");
					break;
		case "V": case "v":
		System.out.print("The color you have selected is Violet");
		break;
		case 6:/* */
			int Val0 = rnb.nextInt();
			System.out.print("Please enter 2nd value: ");
			int Val1 = rnb.nextInt();
			System.out.print("Please enter 3rd value: ");
			int Val2 = rnb.nextInt();

			if ((Val0 >= Val2) && (Val1>=Val2))
			{
				System.out.print (Val0+ " is the largest among all values");
				}
			else if ((Val1>=Val0)&&(Val1>=Val2))
			{
				System.out.print(Val1+" is the largest among all values");
			}
			else if ((Val2>=Val0)&&(Val2>=Val1))
			{
				System.out.print(Val2+" is the largest among all values");
			}
		case 7:
			long val1 = rnb.nextLong();
			int digits = 1;

			if (val1 >=10 && val1<=10)
			{
				digits = 2;

				if (val1>=100 && val1<=100)
				{
					digits = 3;
				}
				else if (val1 >=1000 && val1 <=1000)
				{
					digits = 4;
				}
				System.out.print(val1+ " is a "+digits+" digit number");
				}
		case 8:
			int val1 = rnb.nextInt();
			System.out.print("Please enter the OPERATOR to be use: ");
			char operators = rnb.next().charAt(0);
			System.out.print("Please enter the 2nd value: ");
			int val2 = rnb.nextInt();
			int total = 0;

			switch(operators )
			{
			case '*':
				total = val1 * val2;
				System.out.print(val1+" "+operators+" "+val2+" = "+total);
			break;
			case '/':
				total = val1 / val2;
				System.out.print(val1+" "+operators+" "+val2+" = "+total);
			break;
			case '+':
				total = val1 + val2;
				System.out.print(val1+" "+operators+" "+val2+" = "+total);
			break;
			case '-':
				total = val1 - val2;
				System.out.print(val1+" "+operators+" "+val2+" = "+total);
			break;
			case '%':
				total = val1 % val2;
				System.out.print(val1+" "+operators+" "+val2+" = "+total);
			break;
		default:
				System.out.print("The number you entered is out of the list");
				break;
		}
	}
		}
	}
}