underflowexception.java

this how we make stack and queue in java.

package stackqueue;

public class UnderflowException extends Exception {

	private String message = "";

	public UnderflowException() {
		this.message = "The stack is empty.";
	}
	public UnderflowException(String message) {
		this.message = message;
	}
	public String getMessage() {
		return this.message;
	}
	
}