Assistantクラスを使い待機状態と再開を確認できるプログラムの作成 loafとrestartメソッドを設ける workメソッドが呼ばれる度loafを呼び出す Managerクラスを定義 checkメソッドを設け、Assistantをcheckし続ける loaf状態ならrestartさせる （Managerクラスはデーモンスレッド） ということなんですが、いまいちうまくいきません さぼっても復帰してくれません public class Assistant implements Runnable { private String name; private Chore c; public Assistant(String name, Chore c) { this.name = name; this.c = c; } public void run() { work(); } public void work() { while (true) { synchronized (c) { if (c.doEnd()) break; System.out.println(name + " : " + c.digest()); loaf(); } } } public synchronized void loaf() { try { c.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } public synchronized void restart() { c.notify(); } } public class Chore { private String name; private int step; private int id; public Chore(String name) { this.name = name; this.step = this.name.length(); this.id = 0; } public synchronized String digest() { String message = "" + id + name.charAt(id); try { Thread.sleep(500); } catch (InterruptedException ie) { } id++; return message; } public synchronized boolean doEnd() { return id >= step; } } public class Manager extends Thread { private String name; private Assistant a; public Manager(String name) { this.name = name; } public void run() { check(); } public void check() { a.restart(); } } public class Test { public static void main(String[] args) { Chore[] ch = { new Chore("掃除"), new Chore("プリント印刷"), new Chore("出欠データ入力") }; Assistant[] a = { new Assistant("あ", ch[0]), new Assistant("\tい", ch[1]), new Assistant("\t\tう", ch[2] }; Thread[] t = new Thread[a.length]; for (int i = 0; i < t.length; i++) { t[i] = new Thread(a[i]); } for (int i = 0; i < t.length; i++) { t[i].start(); } Manager m = new Manager("監査"); m.setDaemon(true); m.start(); for (int i = 0; i < t.length; i++) { try { t[i].join(); } catch( InterruptedException ie ) { } } }
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