主要练习了队列数据结构,对象序列化和反序列化,多线程操作
import java.io.BufferedReader; java.io.File; java.io.FileInputStream; java.io.FileOutputStream; java.io.InputStream; java.io.InputStreamReader; java.io.ObjectInputStream; java.io.ObjectOutputStream; java.io.Serializable; public class QueueThreadDemp { static StringQueue names; static void main(String[] args) throws Exception { names=getQueueObj(); // 子线程循环队列 new Thread(new Runnable() { @Override void run() { while (true) { try { Thread.sleep(5000); names = QueueThreadDemp.getQueueObj(); System.out.println(names.toString()); } catch (Exception e) { e.printStackTrace(); } } } }).start(); 读取键盘输入 InputStream is = System.in; InputStreamReader isr = InputStreamReader(is); BufferedReader br = BufferedReader(isr); ) { String name = br.readLine(); names.push(name); File file = new File("E:\\queue.txt"); FileOutputStream fos = FileOutputStream(file); ObjectOutputStream oos = ObjectOutputStream(fos); oos.writeObject(names); oos.close(); fos.close(); } } static StringQueue getQueueObj() Exception { File file = ); if (file.exists() && file.length() > 0) { FileInputStream fis = FileInputStream(file); ObjectInputStream ois = ObjectInputStream(fis); names = (StringQueue) ois.readObject(); ois.close(); fis.close(); } else { names = new StringQueue(5); } return names; } } 数组队列 class StringQueue implements Serializable { private String[] mNames; private int index = 0; int nums; public StringQueue( nums) { mNames = String[nums]; this.nums = nums; } push(String name) { if (index >= nums) { pop(); } mNames[index] = name; index++; } pop() { for (int i = 1; i < index; i++) { mNames[i - 1] = mNames[i]; } index = index - 1public String toString() { String mes = ""; for (String name : mNames) { mes += name + ","; } mes; } }
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