⬅ Decimal To Binary using Stack | A Helpful Line-by-Line Code Tutorial

import java.util.Scanner;

public class DecimalToBinary {
	
	static Scanner scan;
	static int decValue;
	static Stack stack;
	
	public static void main(String[] args){
		
		scan = new Scanner(System.in);
		stack = new Stack();
		
		System.out.println("Enter a number! ");
		
		decValue = scan.nextInt();
		
		while(decValue != 0){
			
			stack.push(decValue%2);
			decValue = decValue/2;
			
		}
		
		System.out.println("The binary value is! ");
		
		while(!(stack.isStackEmpty())){
			
			System.out.print(stack.pop());
			
		}
		
	}
	
}


public class Stack {
	
	static final int max = 30;
	int[] stack = new int[max];
	int top;
	
	Stack(){
		
		top = 0;
	
	}
	
	int pop(){
		
		try{
			
			return stack[--top];
		
		}catch(Exception e){
			
			System.out.println("Cannot pop anymore!");
			return -1;
			
		}
	
	}
	
	void push(int num){
		
		if(top<max){
			
			stack[top++] = num;
			
		}else{
			
			System.out.println("Elements cannot be added!");
			
		}
	
	}
	
	boolean isStackFull(){
		
		if(top==max-1){
			
			return true;
			
		}else{
			
			return false;
			
		}
		
	}
	
	//Another function!
	boolean isStackEmpty(){
		
		if(top<=0){
			
			return true;
			
		}else{
			
			return false;
			
		}
		
	}
	
}