Mindmelt.java

import java.util.Stack;

public class Mindmelt {

	public static void main(String[] args) {

		//Scanner scanner = new Scanner(System.in);
		Interpreter i = new Interpreter(new char[0]/*scanner.nextLine().toCharArray()*/);

		int index = 0;
		char[] commands = ">+++++++++[<++++++++>-]<.>+++++++[<++++>-]<+.+++++++..+++.[-]>++++++++[<++++>-] <.>+++++++++++[<++++++++>-]<-.--------.+++.------.--------.[-]>++++++++[<++++>- ]<+.[-]++++++++++.".toCharArray();
		do {
			index = i.interpret(index, commands);
		} while (index > -1);
	}

	static class Interpreter {

		Interpreter(char[] i) {
			this.i = i;
		}

		char[] i;
		int[] m = new int[30_000];
		int p, r;
		Stack<Integer> s = new Stack<>();

		int interpret(int index, char[] command) {
			char c = command[index];
			switch (c) {
				case '+': m[p]++; break;
				case '-': m[p]--; break;
				case '>': p++; break;
				case '<': p--; break;
				case '[':
					if (m[p] != 0)
						s.push(index);
					break;
				case ']':
					int pos = s.pop();
					if (m[p] != 0)
						return pos;
					break;
				case '.': System.out.print(Character.toChars(m[p])); break;
				case ',': m[p] = i[r++]; break;
				default: break;
			}
			return index + 1 < command.length ? index + 1 : -1;
		}

	}

}