String Reverser Through Stack : Stack « Collections Data Structure « Java

1. Java
2. Collections Data Structure
3. Stack

String Reverser Through Stack

import java.io.IOException; publicclass StringReverserThroughStack { private String input; private String output; public StringReverserThroughStack(String in) { input = in; } public String doRev() { int stackSize = input.length(); Stack theStack = new Stack(stackSize); for (int i = 0; i < input.length(); i++) { char ch = input.charAt(i); theStack.push(ch); } output = ""; while (!theStack.isEmpty()) { char ch = theStack.pop(); output = output + ch; } return output; } publicstaticvoid main(String[] args) throws IOException { String input = "Java Source and Support"; String output; StringReverserThroughStack theReverser = new StringReverserThroughStack(input); output = theReverser.doRev(); System.out.println("Reversed: " + output); } class Stack { privateint maxSize; privatechar[] stackArray; privateint top; public Stack(int max) { maxSize = max; stackArray = newchar[maxSize]; top = -1; } publicvoid push(char j) { stackArray[++top] = j; } publicchar pop() { return stackArray[top--]; } publicchar peek() { return stackArray[top]; } publicboolean isEmpty() { return (top == -1); } } } 

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