Whether it is a number with all consecutive digits or not

import javax.swing.JOptionPane;

public class Consecutive {

	public static void main(String[] args) {
		int [] input = new int [4];
		int number= Integer.parseInt(JOptionPane.showInputDialog"Enter a 4 digit or less positive number:");
		
		
		for (int i=3; i>=0; i=i-1){
			input[i]=number%10;
			number=number/10;
		}
        if((IsConsecutive(input[3],input[2],input[1],input[0]))==true){
        	System.out.println("The number is Consecutive");
        }else{
        	System.out.println("The number is NOT Consecutive");
        }
	}
	
	public static boolean IsConsecutive(int ones,int tens,int hundreds, int thousands) {
	    if(    (ones==tens+1)    ||    ((ones==tens+1)&& (tens==hundreds+1))   ||     ((ones==tens+1) && (tens==hundreds+1) && (hundreds==thousands+1))   ){
	        return true;
	    }else{
	        return false;
	    }
	}

	}