How to remove and print every item in an IntStack object until it is empty?

Question

I am having trouble figuring out how to remove and print every item in an IntStack object until it is empty. Would I need to use an if statement? I know the basics of stacks, for example: Suppose s refers to an IntStack object.

If I wanted to add the value 100 to the top of s, I would simply use s.push(100)

If I wanted to remove and print the top value of s, I would use s.pop()

If I wanted to print the top value without removing it, I would use s.peek()

I run into trouble once I try to remove and print every item in s until it is empty.

`IntStack` is not a standard JDK class. Which library are you using? — shmosel, Sep 20 '16 at 03:18

JTeam · Accepted Answer · 2016-09-20T03:24:25.480

1

Even If InStack is some third party stack, as per the description in question it implements all the standard stack methods, so following should work.

public void print(Stack s)
{
   while(!s.isEmpty())
   {
       System.out.println(s.pop());
   }

}

edited Sep 20 '16 at 03:24

answered Sep 20 '16 at 03:21

JTeam

1,455
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Why not `System.out.println(s.pop())`? – shmosel Sep 20 '16 at 03:21
@JTeam May I ask what the "!" does in (!s.isEmpty)? – Derrik Antrium Sep 21 '16 at 02:11
It is not operator of JAVA - execute the code inside while loop -> while stack is not empty. You can read the basic java operators on internet. – JTeam Sep 21 '16 at 06:20

score -1 · Answer 2 · answered Sep 20 '16 at 03:20

-1

Assumming when there is nothing in the stack, s.peek() will return null,

while(s.peek() != null){
    System.out.println(s.pop());
}

answered Sep 20 '16 at 03:20

Tan Li Hau

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Whatever `IntStack` is, it probably holds primitives. – shmosel Sep 20 '16 at 03:21

How to remove and print every item in an IntStack object until it is empty?

2 Answers2