Thread: someone can help me ?

hey , hope u guys doing well . i just want to ask for some help . its not about solving my coding but about understanding in java . my teacher had give me an exercise and ask me to type it using jcreator . i figured it out and the process complete . but the problem is i dont fully understand about the question that i had been gave . can anyone help me explain the coding that i've attach here with adding some comment in the coding ?

so this the first coding .

import java.util.*; 
class StackDemo {
static void showpush(Stack st, int a) {
st.push(new Integer(a));
System.out.println("push(" + a + ")");
System.out.println("Stack: " + st);
}
static void showpop(Stack st) {
System.out.print("pop -> ");
Integer a = (Integer) st.pop();
System.out.println(a);
System.out.println("stack: " + st);
}
public static void main(String args[]) {
Stack st = new Stack();
System.out.println("stack: " + st);
showpush(st, 42);
showpush(st, 66);
showpush(st, 99);
showpop(st);
showpop(st);
showpop(st);
try {
showpop(st);
} catch (EmptyStackException e) {
System.out.println("empty stack");
}
}
}

and this is the second conding .

import java.util.*;
 
public class StackDemo1{
	public static void main(String[] args) {
		Stack stack=new Stack();
		stack.push(new Integer(10));
		stack.push("a");
		System.out.println("The contents of Stack is " + stack);
		System.out.println("The size of an Stack is " + stack.size());
		System.out.println("The number poped out is " + stack.pop());
		System.out.println("The number poped out is " + stack.pop());
 
		System.out.println("The contents of stack is " + stack);
		System.out.println("The size of an stack is " + stack.size());
	}
}

Originally Posted by skyzred

but the problem is i dont fully understand about the question that i had been gave .

You might want to check out the link in my signature on asking smart questions, especially the bit about writing clearly. Many of our users do not speak English as a first language, and so it can be hard to understand incorrectly written posts.

That being said, what question? What's your question? What happened when you stepped through this with a debugger?