public class MyStack {
private int top;
private int[] arr;
public MyStack(int size) {
arr = new int[size];
}
public boolean isEmpty() {
return top == 0;
}
public boolean isFull() {
return top == arr.length;
}
public void push(int data) {
if(isFull()){
throw new RuntimeException("数据满了");
}
arr[top++] = data;
}
public int pop() {
if(isEmpty()){
System.out.println("空了");
throw new RuntimeException("没数据了");
}
return arr[--top];
}
public int size() {
return top;
}
public static void main(String[]args){
MyStack myStack = new MyStack(6);
myStack.push(1);
myStack.push(2);
myStack.push(3);
myStack.push(4);
myStack.push(5);
myStack.push(6);
System.out.println("pop:"+myStack.pop());
System.out.println("size:"+myStack.size());
// System.out.println("pop:"+myStack.pop());
// System.out.println("pop:"+myStack.pop());
// System.out.println("pop:"+myStack.pop());
// System.out.println("pop:"+myStack.pop());
}
}
