I am trying to work out how to create an input validation where it won't let you enter the same number twice as well as being inside a range of numbers and that nothing can be entered unless it's an integer. I am currently creating a lottery program and I am unsure how to do this. Any help would be much appreciated. My number range validation works but the other two validations do not. I attempted the non duplicate number validation and i'm unsure how to do the numbers only validation. Can someone show me how to structure this please.
This method is in my Player class
public void choose() {
int temp = 0;
for (int i = 0; i<6; i++) {
System.out.println("Enter enter a number between 1 & 59");
temp = keyboard.nextInt();
keyboard.nextLine();
while ((temp<1) || (temp>59)) {
System.out.println("You entered an invalid number, please enter a number between 1 and 59");
temp = keyboard.nextInt();
keyboard.nextLine();
}
if (i > 0) {
while(temp == numbers[i-1]) {
System.out.println("Please enter a different number as you have already entered this");
temp = keyboard.nextInt();
keyboard.nextLine();
}
}
numbers[i] = temp;
}
}