Java, Printing the stack values

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In Java, I want to print the contents of a Stack. The toString() method prints them encased in square brackets delimited by commas: [foo, bar, baz].

The question is, how do I get rid of them and print the variables only?

My code so far:

Stack myStack = new Stack ();
for(int j=0;j<arrayForVar.length;j++) {
if(arrayForVar[j][1]!=null) {
  System.out.printf("%s \n",arrayForVar[j][1]+"\n");
System.out.printf("%s \n",myStack.toString());

This answer worked for me:

Use the toString method on the Stack, and use replaceAll method to replace all instances of square brackets with blankstring. Like this:

    myStack.toString().replaceAll("\\[", "").replaceAll("]", ""));

There is a workaround.

You could convert it to an array and then print that out with Arrays.toString(Object[]):


Java, Printing the stack values, Given a stack s, the task is to print the elements of the stack from bottom to top, such that the Java. filter_none. edit close. play_arrow. link brightness_4 code Infix to Postfix using different Precedence Values for In-Stack and Out-Stack  Because the java's stack extends the class Vector , and the Vector is implemented by array. The stack not override the toString method, so when you call the toString (), it calls the collection's method . Recursion and Stack are like two peas in a pod. So, anything related to one can be solved by the other.

Use the same kind of loop that you used to fill the stack and print individual elements to your liking. There is no way to change the behavior of toString, except if you go the route of subclassing Stack, which I wouldn't recommend. If the source code of Stack is under your control, then just fix the implementation of toString there.

Print Stack Elements from Bottom to Top, Return value: The method returns an enumeration of the values of the Stack. Below programs are used to illustrate the working of the java.util.Stack.elements()​  You don’t need to catch an Exception in order to print a stack trace in Java. Sometimes they can be helpful for debugging and logging purposes. Here’s an example of how to print a stack trace at any moment: new Exception().printStackTrace(); If you want more control over the output, you can build some code off the following:

Use toArray() to print the stack values

public void printStack(Stack<Integer> stack) {

        // method 1:
        String values = Arrays.toString(stack.toArray());

        // method 2:
        Object[] vals = stack.toArray();
        for (Object obj : vals) {

Stack elements() method in Java with Example, A Stack is a first-in, last-out data structure that pops elements in the opposite order than Example stack = Stack( Array( bat, cat, dog ) ) Non-​destructively enumerate the Stack. bat cat dog Pop and print each Since the hash value of an // Integer is its int value, this will order Integers in descending order. I am working on a random number method to pick a random element from an array. However, I don't know how to print the return value from the getRandom() method. Here is the code.


Using Java 8 and later stream functions

Queues and Stacks, To declare Stack in Java, first, start with keyword stack , followed by angle brackets, <> pushing values in stack System.out.println("Print Stack before pop:");. Given a stack s, the task is to print the elements of the stack from bottom to top, such that the elements are still present in the stack without their order being changed in the stack. Examples: Approach 1 (Recursion):The idea is to pop the element of the stack and call the recursive function PrintStack.

From documentation of toString() method of AbstractCollection. So you can not do it unless you define your own StackOr implement custom toString() by iterating over Stack

public String toString()

Returns a string representation of this collection. The string representation consists of a list of the collection's elements in the order they are returned by its iterator, enclosed in square brackets ("[]"). Adjacent elements are separated by the characters ", " (comma and space). Elements are converted to strings as by String.valueOf(Object).

This implementation creates an empty string buffer, appends a left square bracket, and iterates over the collection appending the string representation of each element in turn. After appending each element except the last, the string ", " is appended. Finally a right bracket is appended. A string is obtained from the string buffer, and returned.

How to use the Stack class in Java, Java - The Stack Class - Stack is a subclass of Vector that implements a void showpop(Stack st) { System.out.print("pop -> "); Integer a = (Integer) st.pop();  If you use the built-in java.util.Stack type, then this derives from Vector, so you can use getElement(int) to read elements at any stack depth.. If this is your own code, you will have to add a method to do the same.

Java - The Stack Class, Java Examples - print stack trace - How to print stack of the Exception ? i--) { System.out.println("The value of array is" +array[i]); } } catch (Exception e) { e. Java Stack is LIFO object. It extends Vector class but supports only five operations. Java Stack class has only one constructor which is empty or default constructor. So, when we create a Stack, initially it contains no items that mean Stack is empty. Stack internally has a pointer: TOP, which refers to the top of the Stack element.

Java Examples - print stack trace, The Java Stack class is a classical stack data structure, where elements can be pushed onto the top of the stack, and popped off the top again. This Java Stack tutorial explains how to use the Stack class. hasNext()){ Object value = iterator.​next(); } The lambda just prints out the element to System.out  Stack pop() Method in Java. The Java.util.Stack.pop() method in Java is used to pop an element from the stack. The element is popped from the top of the stack and is removed from the same. Syntax: Parameters: The method does not take any parameters. Return Value: This method returns the element present at the top of the stack and then removes it.

Java Stack, A Stack is a Last In First Out (LIFO) data structure. It supports two basic operations called push and pop. The push operation adds an element at  Java Collection framework provides a Stack class which models and implements Stack data structure. The class is based on the basic principle of last-in-first-out. In addition to the basic push and pop operations, the class provides three more functions of empty, search and peek. The class can also be said to extend Vector and treats the class

  • I suspect half the code you have doesn't do what you want. Can you simplify your example? Why are you using a Stack at all?
  • Hi Lads, I appreciate everyone's help, i guess I found what i need, the answer to my question is as follows: System.out.print(myStack.toString().replaceAll("\\[", "").replaceAll("]", ""));
  • why you put // for [ and don't for ]?
  • Thanks Armani! That helped me. You should rewrite your update (to your question) as the answer and accept it. Then I would up vote that too!
  • its from…
  • Welcome to SO. Please format your code and explain a little bit because this answers the question.