设num个元素的进栈序列是(1, 2, 3,…, num),进栈过程中可以随时出栈元素 创建自定义栈类MyStack,进栈线程类InputStack和出栈线程类OutputStack,在测试类StackDemo模拟序列(1, 2, 3, …, 20)的出栈顺序,根据要求和代码注释补充代码,并输出至少5组不同结果
时间: 2024-02-18 11:06:05 浏览: 24
自定义栈类MyStack:
```java
import java.util.Stack;
public class MyStack {
private Stack<Integer> stack;
public MyStack() {
stack = new Stack<>();
}
// 入栈方法,将元素num入栈
public void push(int num) {
stack.push(num);
}
// 出栈方法,返回栈顶元素
public int pop() {
return stack.pop();
}
// 判断栈是否为空
public boolean isEmpty() {
return stack.isEmpty();
}
// 获取栈的大小
public int size() {
return stack.size();
}
}
```
进栈线程类InputStack:
```java
public class InputStack extends Thread {
private MyStack stack;
private int num;
public InputStack(MyStack stack, int num) {
this.stack = stack;
this.num = num;
}
@Override
public void run() {
// TODO: 实现入栈方法,将元素num入栈
stack.push(num);
}
}
```
出栈线程类OutputStack:
```java
public class OutputStack extends Thread {
private MyStack stack;
public OutputStack(MyStack stack) {
this.stack = stack;
}
@Override
public void run() {
// TODO: 实现出栈方法,输出栈顶元素
while (!stack.isEmpty()) {
System.out.print(stack.pop() + " ");
}
System.out.println();
}
}
```
测试类StackDemo:
```java
public class StackDemo {
public static void main(String[] args) {
int num = 20;
int[] arr = new int[num];
for (int i = 0; i < num; i++) {
arr[i] = i + 1;
}
// 创建自定义栈类对象
MyStack stack = new MyStack();
// 创建出栈线程对象
OutputStack outputStack = new OutputStack(stack);
// 创建进栈线程对象并启动线程
for (int i = 0; i < num; i++) {
InputStack inputStack = new InputStack(stack, arr[i]);
inputStack.start();
}
// 等待所有进栈线程执行完毕
while (Thread.activeCount() > 1) {
Thread.yield();
}
// 启动出栈线程
outputStack.start();
}
}
```
输出结果:
```
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
```