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public class JavaStackTest { public static void main(String[] args) { Stack<String> stack = new Stack<String>(); stack.push("Item1"); stack.push("Item2"); stack.push("Item3"); System.out.println(stack.pop()); // Item3 stack.push("Item4"); stack.push("Item5"); System.out.println(stack.pop()); // Item5 System.out.println(stack.pop()); // Item4 System.out.println(stack.pop()); // Item2 stack.push("Item6"); System.out.println(stack.pop()); // Item6 System.out.println(stack.pop()); // Item1 } }
> javac JavaStackTest.java > java JavaStackTest Item3 Item5 Item4 Item2 Item6 Item1
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public class IntStack { private int[] data = new int[256]; private int sp = 0; public int pop() { return data[--sp]; } public void push(int value) { data[sp++] = value; } }
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public class IntStackTest { public static void main(String[] args) { IntStack stack = new IntStack(); stack.push(1); stack.push(2); stack.push(3); System.out.println(stack.pop()); // 3 stack.push(4); stack.push(5); System.out.println(stack.pop()); // 5 System.out.println(stack.pop()); // 4 System.out.println(stack.pop()); // 2 stack.push(6); System.out.println(stack.pop()); // 6 System.out.println(stack.pop()); // 1 } }
> javac IntStackTest.java > java IntStackTest 3 5 4 2 6 1
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