Push: To insert a data item on the stack
Pop : To remove a data item from the top of the stack
Peek: Read the value from the top of the stack without removing it.
class Stack {
private int maxSize;
private double[] stackArray;
private int top;
public Stack(int s) {
maxSize = s;
stackArray = new double[maxSize];
top = -1;
}
public void push(double j) {
stackArray[++top] = j;
}
public double pop() {
return stackArray[top--];
}
public double peek() {
return stackArray[top];
}
public boolean isEmpty() {
return (top == -1);
}
public boolean isFull() {
return (top == maxSize - 1);
}
}
public class MainClass {
public static void main(String[] args) {
Stack theStack = new Stack(10);
theStack.push(20);
theStack.push(40);
theStack.push(60);
theStack.push(80);
while (!theStack.isEmpty()) {
double value = theStack.pop();
System.out.print(value);
System.out.print(" ");
}
System.out.println("");
}
}
80.0 60.0 40.0 20.0